commit 2dc41ed4fa61fcb0f2b5da200a68984958e565d1
Author: Nurfog <juan.allende@gmail.com>
Date:   Tue Oct 13 17:32:55 2026 -0300

    feat: modulo de proyectos frontend (Next 16 + Bootstrap 5)

diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..1459104
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,19 @@
+# Configuración local de desarrollo (no se commitea: ver .gitignore).
+#
+# SAM_API_URL y SAM_API_KEY NO llevan prefijo NEXT_PUBLIC_: solo las ve el
+# servidor (el route handler src/app/api/proyectos/[...path]/route.ts), así
+# que la API key no se empaqueta en el JavaScript del navegador.
+
+# URL base de SAM.API (el backend compartido de SAM).
+SAM_API_URL=http://127.0.0.1:5000
+
+# API key global de SAM, enviada en el header X-Api-Key por el proxy.
+# Defínela como variable de entorno real en producción, no en este archivo.
+SAM_API_KEY=
+
+# Muestra la UI con datos mock en memoria, sin backend.
+# Descomenta solo para desarrollar sin SAM.API levantado:
+# NEXT_PUBLIC_USE_MOCK=true
+
+# Identificador del módulo (informativo, lo usa el deployer de SAM).
+NEXT_PUBLIC_MODULE=proyectos
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b634ead
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,28 @@
+# dependencies
+/.pnp
+.pnp.*
+node_modules
+
+# next.js
+/.next/
+/out/
+next-env.d.ts
+
+# production
+build/
+dist/
+
+# misc
+.DS_Store
+*.pem
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# env
+.env
+.env*.local
+
+# typescript
+*.tsbuildinfo
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..ee20047
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,32 @@
+FROM node:22-alpine AS base
+
+# Deps
+FROM base AS deps
+WORKDIR /app
+COPY package.json package-lock.json* ./
+RUN npm ci || npm install
+
+# Build
+FROM base AS builder
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+RUN npm run build
+
+# Production
+FROM base AS runner
+WORKDIR /app
+ENV NODE_ENV=production
+
+RUN addgroup --system --gid 1001 nodejs
+RUN adduser --system --uid 1001 nextjs
+
+COPY --from=builder /app/public ./public
+COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
+COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
+
+USER nextjs
+EXPOSE 3000
+ENV PORT=3000
+
+CMD ["node", "server.js"]
diff --git a/README.md b/README.md
new file mode 100644
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--- /dev/null
+++ b/README.md
@@ -0,0 +1,132 @@
+# Proyectos · SAM
+
+Frontend del módulo de gestión de proyectos de la plataforma **SAM**, con
+estética y flujo de trabajo al estilo [Linear](https://linear.app).
+
+Es una aplicación **Next.js 16 + Bootstrap 5** (App Router, TypeScript). No
+tiene backend propio: se apoya en `SAM.API`, la API compartida de SAM.
+
+## Características
+
+- **Issues**: lista agrupada por estado, con filtros y edición en línea.
+- **Detalle**: descripción, propiedades editables y comentarios.
+- **Tablero Kanban**: arrastrar y soltar entre columnas de estado.
+- **Ciclos**: sprints con progreso y issues asignados.
+- **Proyectos**: agrupan issues, con lead, fechas y barra de progreso.
+- **Bandeja**: issues abiertos asignados al usuario actual.
+- **Palette de comandos**: `Cmd/Ctrl + K` para navegar y crear issues.
+
+## Requisitos
+
+- Node.js 22+
+- npm
+
+## Desarrollo
+
+```bash
+npm install
+npm run dev
+```
+
+La app queda en `http://localhost:3000`.
+
+### Scripts
+
+| Comando             | Descripción                        |
+| ------------------- | ---------------------------------- |
+| `npm run dev`       | Servidor de desarrollo             |
+| `npm run build`     | Build de producción (standalone)   |
+| `npm run start`     | Sirve el build de producción       |
+| `npm run typecheck` | Comprueba tipos sin emitir         |
+
+## Arquitectura
+
+```
+src/
+├── app/                  # Rutas (App Router)
+│   ├── inbox/            # Issues asignados al usuario
+│   ├── issues/           # Lista de issues
+│   │   └── [id]/         # Detalle de un issue
+│   ├── board/            # Tablero Kanban
+│   ├── cycles/           # Ciclos / sprints
+│   └── projects/         # Proyectos
+│       └── [id]/         # Detalle de proyecto
+├── components/
+│   ├── layout/           # Sidebar, Topbar, AppShell, palette
+│   ├── issues/           # IssueList, IssueRow
+│   ├── board/            # Tablero Kanban
+│   └── ui/               # Avatar, iconos, etiquetas, progreso
+├── hooks/
+│   └── useIssues.ts      # Carga de issues con filtros y refresco
+└── lib/
+    ├── types.ts          # Modelo de dominio (contrato con SAM)
+    ├── meta.ts           # Definiciones de estado/prioridad/tipo
+    ├── format.ts         # Helpers de formato de fechas
+    ├── seed.ts           # Datos de ejemplo (mock)
+    ├── store.tsx         # Contexto de datos de referencia
+    └── api/
+        ├── client.ts     # Interfaz ProyectosApi
+        ├── mock.ts       # Implementación en memoria
+        └── index.ts      # Selección de implementación
+```
+
+### Capa de datos
+
+Toda la app habla contra la interfaz `ProyectosApi` (`src/lib/api/client.ts`),
+nunca contra una implementación concreta. Hay dos implementaciones:
+
+- `httpApi` (`src/lib/api/http.ts`): la real, contra `SAM.API`. Es la que se
+  usa por defecto.
+- `mockApi` (`src/lib/api/mock.ts`): datos en memoria sobre `src/lib/seed.ts`,
+  para desarrollar la UI sin backend. Se activa con `NEXT_PUBLIC_USE_MOCK=true`.
+
+La selección está en `src/lib/api/index.ts`. Para cambiar de implementación
+no hay que tocar componentes, hooks ni páginas: el contrato no cambia.
+
+### Autenticación
+
+La API key global de SAM (`X-Api-Key`) **nunca llega al navegador**.
+
+El navegador llama a `/api/proyectos/*` en el mismo origen. Ese route handler
+(`src/app/api/proyectos/[...path]/route.ts`) reenvía la petición a `SAM.API`
+añadiendo la cabecera en el servidor.
+
+La clave vive en `SAM_API_KEY`, sin prefijo `NEXT_PUBLIC_`. Next.js solo
+inyecta en el bundle JS las variables `NEXT_PUBLIC_*`, así que esta queda
+restringida al proceso del servidor.
+
+### Sesión de usuario
+
+`AuthProvider` (`src/lib/auth.tsx`) guarda en localStorage el miembro devuelto
+por `POST /api/proyectos/auth/login`, que valida contra `sige_sam_v3.usuario`.
+Ese `idUsuario` es quien firma los comentarios y filtra la bandeja.
+
+> **Nota**: los tipos de `src/lib/types.ts` son el contrato esperado del
+> backend. Los endpoints de `SAM.API` devuelven esta misma forma.
+
+## Despliegue en SAM
+
+Sigue el patrón de módulo de SAM: frontend independiente conectado a la API
+compartida a través de la red `sam-net`.
+
+- `Dockerfile`: build standalone de Next.js.
+- `docker-compose.module.yml`: servicio `proyectos-frontend` con healthcheck.
+
+Dentro de la red `sam-net` el frontend alcanza el backend por nombre de
+contenedor: `SAM_API_URL=http://sam-api:5000`.
+
+`SAM_API_KEY` se inyecta desde el entorno del host (`${SAM_API_KEY}` en el
+compose); no se escribe en el archivo.
+
+## Variables de entorno
+
+| Variable               | Quién la lee | Descripción                                            |
+| ---------------------- | ------------ | ------------------------------------------------------ |
+| `SAM_API_URL`          | servidor     | URL base de `SAM.API`. Por defecto `http://127.0.0.1:5000`. |
+| `SAM_API_KEY`          | servidor     | API key global de SAM (`X-Api-Key`). Sin ella el proxy responde 503. |
+| `NEXT_PUBLIC_MODULE`   | cliente      | Identificador del módulo (informativo).                |
+| `NEXT_PUBLIC_USE_MOCK` | cliente      | `true` para usar datos mock en memoria sin backend.    |
+
+> `SAM_API_URL` y `SAM_API_KEY` no llevan prefijo `NEXT_PUBLIC_` a propósito:
+> solo las ve el proceso del servidor, así que la clave no se empaqueta en el
+> JavaScript que descarga el navegador.
diff --git a/docker-compose.module.yml b/docker-compose.module.yml
new file mode 100644
index 0000000..abe55ad
--- /dev/null
+++ b/docker-compose.module.yml
@@ -0,0 +1,32 @@
+# ============================================================
+# Módulo: proyectos (frontend)
+# Solo Frontend Next.js (backend compartido SAM.API)
+# ============================================================
+
+services:
+  proyectos-frontend:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    container_name: proyectos-frontend
+    restart: unless-stopped
+    environment:
+      # La URL de SAM.API y su API key NO llevan prefijo NEXT_PUBLIC_:
+      # las lee solo el servidor (route handler src/app/api/proyectos/[...path]/route.ts).
+      # Así la clave no se empaqueta en el bundle JS del navegador.
+      # Dentro de sam-net el backend es alcanzable por nombre de contenedor.
+      SAM_API_URL: http://sam-api:5000
+      # Se inyecta desde el entorno del host; nunca se escribe aquí.
+      SAM_API_KEY: ${SAM_API_KEY}
+      NEXT_PUBLIC_MODULE: proyectos
+    networks:
+      - sam-net
+    healthcheck:
+      test: ["CMD", "wget", "-q", "--spider", "http://localhost:3000"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+
+networks:
+  sam-net:
+    external: true
diff --git a/next.config.ts b/next.config.ts
new file mode 100644
index 0000000..3df43b8
--- /dev/null
+++ b/next.config.ts
@@ -0,0 +1,8 @@
+import type { NextConfig } from "next";
+
+const nextConfig: NextConfig = {
+  output: "standalone",
+  reactStrictMode: true,
+};
+
+export default nextConfig;
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..e880897
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1382 @@
+{
+  "name": "sam-proyectos",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "sam-proyectos",
+      "version": "1.0.0",
+      "dependencies": {
+        "bootstrap": "^5.3.8",
+        "boxicons": "^2.1.4",
+        "next": "^16.0.0",
+        "react": "^19.0.0",
+        "react-dom": "^19.0.0"
+      },
+      "devDependencies": {
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+        "@types/react": "^19.0.0",
+        "@types/react-dom": "^19.0.0",
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+      }
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+      "license": "MIT"
+    },
+    "node_modules/tslib": {
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+      "license": "0BSD"
+    },
+    "node_modules/typescript": {
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+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
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+        "tsserver": "bin/tsserver"
+      },
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+      }
+    },
+    "node_modules/undici-types": {
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+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/value-equal": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/value-equal/-/value-equal-1.0.1.tgz",
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+      "license": "MIT"
+    },
+    "node_modules/warning": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/warning/-/warning-4.0.3.tgz",
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+      "license": "MIT",
+      "dependencies": {
+        "loose-envify": "^1.0.0"
+      }
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..1fbe02f
--- /dev/null
+++ b/package.json
@@ -0,0 +1,25 @@
+{
+  "name": "sam-proyectos",
+  "version": "1.0.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "lint": "next lint",
+    "typecheck": "tsc --noEmit"
+  },
+  "dependencies": {
+    "bootstrap": "^5.3.8",
+    "boxicons": "^2.1.4",
+    "next": "^16.0.0",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0"
+  },
+  "devDependencies": {
+    "@types/node": "^24.0.0",
+    "@types/react": "^19.0.0",
+    "@types/react-dom": "^19.0.0",
+    "typescript": "^5.6.0"
+  }
+}
diff --git a/src/app/api/proyectos/[...path]/route.ts b/src/app/api/proyectos/[...path]/route.ts
new file mode 100644
index 0000000..c173388
--- /dev/null
+++ b/src/app/api/proyectos/[...path]/route.ts
@@ -0,0 +1,87 @@
+import { NextRequest, NextResponse } from "next/server";
+
+/**
+ * Proxy servidor <-> SAM.API para el módulo de Proyectos.
+ *
+ * Motivo de existir: la API key global de SAM (`X-Api-Key`) no debe llegar
+ * jamás al navegador. Si el frontend la enviara directamente quedaría embebida
+ * en el bundle JS (NEXT_PUBLIC_* se inyecta en build time) y cualquier
+ * visitante podría leerla con las DevTools.
+ *
+ * Aquí la clave se lee de `SAM_API_KEY`, que NO lleva prefijo NEXT_PUBLIC_:
+ * Next.js solo expone al cliente las variables NEXT_PUBLIC_*, así que esta
+ * vive únicamente en el proceso del servidor (Node, no Edge).
+ *
+ * El navegador habla contra `/api/proyectos/*` en el mismo origen y este
+ * route handler reenvía la petición a SAM.API añadiendo la cabecera.
+ */
+
+// Node runtime: la variable de servidor solo está disponible aquí.
+export const runtime = "nodejs";
+
+// Nunca cachear: son datos vivos y peticiones con credenciales.
+export const dynamic = "force-dynamic";
+
+const API_URL = (process.env.SAM_API_URL ?? "http://127.0.0.1:5000").replace(/\/+$/, "");
+const API_KEY = (process.env.SAM_API_KEY ?? "").trim();
+
+/** Métodos que admiten cuerpo. */
+const WITH_BODY = new Set(["POST", "PUT", "PATCH", "DELETE"]);
+
+async function proxy(req: NextRequest, path: string[]) {
+  if (!API_KEY) {
+    // Fail-closed: sin clave configurada no se tiene sentido hablar con la API.
+    return NextResponse.json(
+      { message: "SAM_API_KEY no configurada en el servidor." },
+      { status: 503 },
+    );
+  }
+
+  // Reconstruye la ruta preservando el query string original.
+  const target = new URL(`${API_URL}/api/proyectos/${path.join("/")}${req.nextUrl.search}`);
+
+  const headers: Record<string, string> = { "X-Api-Key": API_KEY };
+  const contentType = req.headers.get("content-type");
+  if (contentType) headers["Content-Type"] = contentType;
+
+  const body = WITH_BODY.has(req.method) ? await req.text() : undefined;
+
+  try {
+    const upstream = await fetch(target, {
+      method: req.method,
+      headers,
+      body,
+      cache: "no-store",
+    });
+
+    // Reenvía la respuesta tal cual (código y cuerpo), sin interpretarla.
+    const text = await upstream.text();
+    return new NextResponse(text, {
+      status: upstream.status,
+      headers: {
+        "Content-Type": upstream.headers.get("content-type") ?? "application/json",
+      },
+    });
+  } catch {
+    return NextResponse.json(
+      { message: "No se pudo contactar con SAM.API." },
+      { status: 502 },
+    );
+  }
+}
+
+export function GET(req: NextRequest, { params }: { params: Promise<{ path: string[] }> }) {
+  return params.then((p) => proxy(req, p.path));
+}
+
+export function POST(req: NextRequest, { params }: { params: Promise<{ path: string[] }> }) {
+  return params.then((p) => proxy(req, p.path));
+}
+
+export function PATCH(req: NextRequest, { params }: { params: Promise<{ path: string[] }> }) {
+  return params.then((p) => proxy(req, p.path));
+}
+
+export function DELETE(req: NextRequest, { params }: { params: Promise<{ path: string[] }> }) {
+  return params.then((p) => proxy(req, p.path));
+}
diff --git a/src/app/board/page.tsx b/src/app/board/page.tsx
new file mode 100644
index 0000000..7e708c4
--- /dev/null
+++ b/src/app/board/page.tsx
@@ -0,0 +1,56 @@
+"use client";
+
+import { useCallback, useEffect, useState } from "react";
+import { api } from "@/lib/api";
+import type { Issue, IssueStatus } from "@/lib/types";
+import { AppShell } from "@/components/layout/AppShell";
+import { Board } from "@/components/board/Board";
+
+/**
+ * Vista de tablero Kanban.
+ *
+ * Mueve los issues de columna arrastrando y soltar. El cambio se aplica de
+ * forma optimista y se persiste contra la API.
+ */
+export default function BoardPage() {
+  const [issues, setIssues] = useState<Issue[]>([]);
+  const [loading, setLoading] = useState(true);
+
+  useEffect(() => {
+    let cancelled = false;
+
+    void api.listIssues().then((result) => {
+      if (!cancelled) {
+        setIssues(result);
+        setLoading(false);
+      }
+    });
+
+    return () => {
+      cancelled = true;
+    };
+  }, []);
+
+  const handleMove = useCallback(async (issueId: string, status: IssueStatus) => {
+    // Actualización optimista: reflejar el cambio al instante.
+    setIssues((current) =>
+      current.map((issue) => (issue.id === issueId ? { ...issue, status } : issue)),
+    );
+
+    try {
+      const updated = await api.updateIssue(issueId, { status });
+      setIssues((current) =>
+        current.map((issue) => (issue.id === issueId ? updated : issue)),
+      );
+    } catch {
+      // Revertir consultando de nuevo si falla la escritura.
+      setIssues(await api.listIssues());
+    }
+  }, []);
+
+  return (
+    <AppShell title="Tablero">
+      <Board issues={issues} loading={loading} onMove={handleMove} />
+    </AppShell>
+  );
+}
diff --git a/src/app/cycles/page.tsx b/src/app/cycles/page.tsx
new file mode 100644
index 0000000..5ce9dee
--- /dev/null
+++ b/src/app/cycles/page.tsx
@@ -0,0 +1,131 @@
+"use client";
+
+import Link from "next/link";
+import { useEffect, useState } from "react";
+import { api } from "@/lib/api";
+import type { Cycle, Issue } from "@/lib/types";
+import { formatShortDate } from "@/lib/format";
+import { percent } from "@/lib/format";
+import { AppShell } from "@/components/layout/AppShell";
+import { EmptyState } from "@/components/ui/EmptyState";
+import { ProgressBar } from "@/components/ui/ProgressBar";
+
+const CICLO_META: Record<Cycle["status"], { label: string; color: string }> = {
+  upcoming: { label: "Próximo", color: "#95a2b3" },
+  active: { label: "Activo", color: "#4cb782" },
+  completed: { label: "Completado", color: "#5e6ad2" },
+};
+
+/**
+ * Ciclos (sprints) con su progreso.
+ *
+ * Carga los ciclos y los issues asociados, y calcula el porcentaje de
+ * completados por ciclo para mostrar la barra de progreso.
+ */
+export default function CyclesPage() {
+  const [cycles, setCycles] = useState<Cycle[]>([]);
+  const [issues, setIssues] = useState<Issue[]>([]);
+  const [loading, setLoading] = useState(true);
+
+  useEffect(() => {
+    let cancelled = false;
+
+    void Promise.all([api.listCycles(), api.listIssues()]).then(([cycleData, issueData]) => {
+      if (!cancelled) {
+        setCycles(cycleData);
+        setIssues(issueData);
+        setLoading(false);
+      }
+    });
+
+    return () => {
+      cancelled = true;
+    };
+  }, []);
+
+  // Ciclos ordenados: activo primero, luego próximos, luego completados.
+  const order: Record<Cycle["status"], number> = { active: 0, upcoming: 1, completed: 2 };
+  const sorted = [...cycles].sort((a, b) => order[a.status] - order[b.status]);
+
+  return (
+    <AppShell title="Ciclos">
+      {loading && (
+        <div className="p-4">
+          {Array.from({ length: 3 }).map((_, index) => (
+            <div key={index} className="skeleton mb-3" style={{ height: 96, borderRadius: 10 }} />
+          ))}
+        </div>
+      )}
+
+      {!loading && sorted.length === 0 && (
+        <EmptyState
+          icon="bx-reset"
+          title="No hay ciclos definidos"
+          description="Los ciclos agrupan los issues por periodos de trabajo."
+        />
+      )}
+
+      {!loading && (
+        <div className="p-4 d-flex flex-column gap-3">
+          {sorted.map((cycle) => {
+            const cycleIssues = issues.filter((issue) => issue.cycleId === cycle.id);
+            const doneCount = cycleIssues.filter((issue) => issue.status === "done").length;
+            const meta = CICLO_META[cycle.status];
+
+            return (
+              <article
+                key={cycle.id}
+                className="border rounded-3 p-3"
+                style={{ background: "var(--lp-bg-elevated)", borderColor: "var(--lp-border)" }}
+              >
+                <div className="d-flex align-items-center gap-2 mb-2">
+                  <span style={{ fontWeight: 600, fontSize: 14 }}>{cycle.name}</span>
+                  <span
+                    className="label-chip"
+                    style={{ color: meta.color, borderColor: meta.color }}
+                  >
+                    {meta.label}
+                  </span>
+                  <span style={{ fontSize: 12.5, color: "var(--lp-text-faint)" }}>
+                    {formatShortDate(cycle.startsAt)} – {formatShortDate(cycle.endsAt)}
+                  </span>
+                  <span className="ms-auto" style={{ fontSize: 12.5, color: "var(--lp-text-faint)" }}>
+                    {doneCount}/{cycleIssues.length} issues
+                  </span>
+                </div>
+
+                <ProgressBar
+                  value={percent(doneCount, cycleIssues.length)}
+                  color={cycle.status === "completed" ? "#5e6ad2" : undefined}
+                />
+
+                {cycleIssues.length > 0 && (
+                  <ul className="list-unstyled mt-3 mb-0">
+                    {cycleIssues.slice(0, 4).map((issue) => (
+                      <li key={issue.id} className="py-1">
+                        <Link
+                          href={`/issues/${issue.id}`}
+                          className="d-flex align-items-center gap-2"
+                          style={{ color: "var(--lp-text-muted)", fontSize: 13 }}
+                        >
+                          <span className="issue-identifier">{issue.identifier}</span>
+                          <span className="text-truncate">{issue.title}</span>
+                        </Link>
+                      </li>
+                    ))}
+
+                    {cycleIssues.length > 4 && (
+                      <li style={{ fontSize: 12.5, color: "var(--lp-text-faint)" }}>
+                        +{cycleIssues.length - 4} más
+                      </li>
+                    )}
+                  </ul>
+                )}
+              </article>
+            );
+          })}
+        </div>
+      )}
+    </AppShell>
+  );
+}
diff --git a/src/app/globals.css b/src/app/globals.css
new file mode 100644
index 0000000..fac1baa
--- /dev/null
+++ b/src/app/globals.css
@@ -0,0 +1,844 @@
+@import url("https://fonts.googleapis.com/css2?family=Work+Sans:wght@400;500;600;700&display=swap");
+
+/* ============================================================
+   Proyectos — tema SAM (igual que sam-portal / SistemaCalidad)
+   Sidebar #00285D colapsable 78px <-> 250px, iconos boxicons,
+   hero sam-toolbar, fondo #e9edf4. Bootstrap 5 para el resto.
+   ============================================================ */
+
+:root {
+  --primary: #00285d;
+  --primary-light: #1a3f7a;
+  --primary-gradient: linear-gradient(135deg, #00285d 0%, #1a4a8a 100%);
+  --inv-blue: #015fc9;
+  --inv-muted: #6c788b;
+  --card-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
+  --card-shadow-hover: 0 6px 24px rgba(0, 0, 0, 0.14);
+  --radius: 12px;
+  --transition: 0.25s ease;
+
+  --sidebar-collapsed: 78px;
+  --sidebar-expanded: 250px;
+}
+
+* {
+  -webkit-tap-highlight-color: transparent;
+}
+
+body {
+  font-family: "Work Sans", system-ui, sans-serif;
+  background-color: #e9edf4;
+  color: #16243d;
+  min-height: 100vh;
+  font-size: 14px;
+}
+
+a {
+  color: var(--inv-blue);
+  text-decoration: none;
+}
+
+a:hover {
+  color: #014ea3;
+}
+
+/* ---------------------------------------------------------------
+   Estructura: SamShell
+   --------------------------------------------------------------- */
+
+.sam-shell .sam-sidebar {
+  position: fixed;
+  top: 0;
+  left: 0;
+  height: 100vh;
+  width: var(--sidebar-collapsed);
+  background: var(--primary);
+  z-index: 1030;
+  transition: width var(--transition), transform var(--transition);
+  display: flex;
+  flex-direction: column;
+  overflow-x: hidden;
+}
+
+.sam-shell.open .sam-sidebar {
+  width: var(--sidebar-expanded);
+}
+
+.sam-sidebar .logo-details {
+  height: 60px;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 0 14px;
+  color: #fff;
+  white-space: nowrap;
+}
+
+.sam-sidebar .logo-details .logo_name {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  font-weight: 700;
+  font-size: 1.1rem;
+  opacity: 0;
+  transition: opacity var(--transition);
+}
+
+.sam-shell.open .logo-details .logo_name {
+  opacity: 1;
+}
+
+.sam-sidebar .logo-details #btn {
+  font-size: 1.5rem;
+  cursor: pointer;
+  min-width: 50px;
+  text-align: center;
+  color: #fff;
+}
+
+.sam-sidebar .nav-list {
+  list-style: none;
+  padding: 8px;
+  margin: 0;
+  overflow-y: auto;
+  flex: 1;
+}
+
+.sam-sidebar .nav-list li {
+  position: relative;
+  margin: 4px 0;
+}
+
+.sam-sidebar .nav-list li a {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 10px 12px;
+  border-radius: 8px;
+  color: #dbe4f3;
+  text-decoration: none;
+  white-space: nowrap;
+  font-size: 0.9rem;
+}
+
+.sam-sidebar .nav-list li a i {
+  font-size: 1.4rem;
+  min-width: 30px;
+  text-align: center;
+}
+
+.sam-sidebar .nav-list li a:hover {
+  background: rgba(255, 255, 255, 0.12);
+  color: #fff;
+}
+
+.sam-sidebar .nav-list li a.active {
+  background: #fff;
+  color: var(--primary);
+  font-weight: 600;
+}
+
+.sam-sidebar .links_name {
+  opacity: 0;
+  transition: opacity var(--transition);
+  white-space: nowrap;
+}
+
+.sam-shell.open .links_name {
+  opacity: 1;
+}
+
+.sam-shell:not(.open) .links_name,
+.sam-shell:not(.open) .name_job,
+.sam-shell:not(.open) .brand-text {
+  display: none;
+}
+
+.sam-shell:not(.open) .logo-details {
+  justify-content: center;
+  padding: 0;
+}
+
+.sam-shell:not(.open) .profile-details {
+  justify-content: center;
+}
+
+.sam-shell:not(.open) .profile-details .bx-log-out {
+  margin-left: 0 !important;
+}
+
+.sam-sidebar .tooltip {
+  position: absolute;
+  left: calc(100% + 12px);
+  top: 50%;
+  transform: translateY(-50%);
+  background: #fff;
+  color: var(--primary);
+  padding: 4px 10px;
+  border-radius: 6px;
+  font-size: 0.85rem;
+  white-space: nowrap;
+  opacity: 0;
+  pointer-events: none;
+  box-shadow: var(--card-shadow);
+  z-index: 10;
+}
+
+.sam-shell:not(.open) .nav-list li:hover .tooltip {
+  opacity: 1;
+}
+
+.sam-shell.open .tooltip {
+  display: none;
+}
+
+.sam-sidebar .profile {
+  padding: 12px;
+  border-top: 1px solid rgba(255, 255, 255, 0.15);
+  color: #dbe4f3;
+}
+
+.sam-sidebar .profile-details {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  white-space: nowrap;
+}
+
+.sam-sidebar .profile-details > i {
+  font-size: 1.8rem;
+}
+
+.sam-sidebar .name_job {
+  opacity: 0;
+}
+
+.sam-shell.open .name_job {
+  opacity: 1;
+}
+
+.sam-sidebar .name_job .name {
+  font-size: 0.9rem;
+  font-weight: 600;
+  color: #fff;
+}
+
+.sam-sidebar .name_job .job {
+  font-size: 0.75rem;
+  opacity: 0.7;
+}
+
+.sam-shell .home-section {
+  margin-left: var(--sidebar-collapsed);
+  min-height: 100vh;
+  transition: margin-left var(--transition);
+}
+
+.sam-shell.open .home-section {
+  margin-left: var(--sidebar-expanded);
+}
+
+/* Contador de una cifra en el sidebar */
+.nav-badge {
+  margin-left: auto;
+  background: rgba(255, 255, 255, 0.15);
+  color: #fff;
+  border-radius: 10px;
+  font-size: 0.7rem;
+  padding: 1px 7px;
+  opacity: 0;
+  transition: opacity var(--transition);
+}
+
+.sam-shell.open .nav-badge {
+  opacity: 1;
+}
+
+/* ---------------------------------------------------------------
+   Toolbar (hero)
+   --------------------------------------------------------------- */
+
+.sam-toolbar {
+  background: linear-gradient(135deg, #16243d 0%, #015fc9 100%);
+  border-radius: var(--radius);
+  box-shadow: 0 0.3rem 0.8rem rgba(22, 36, 61, 0.12);
+  padding: 0.6rem 1rem;
+  color: #fff;
+}
+
+.sam-hero-main {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  min-width: 0;
+}
+
+.sam-hero-icon {
+  width: 34px;
+  height: 34px;
+  flex-shrink: 0;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  background: rgba(255, 255, 255, 0.15);
+  border-radius: 8px;
+  font-size: 1.2rem;
+}
+
+.sam-hero-title {
+  font-size: 1rem;
+  font-weight: 700;
+  line-height: 1.2;
+}
+
+.sam-hero-sub {
+  font-size: 0.78rem;
+  opacity: 0.8;
+  line-height: 1.2;
+}
+
+/* ---------------------------------------------------------------
+   Contenido
+   --------------------------------------------------------------- */
+
+.page-pad {
+  padding: 16px 20px 40px;
+}
+
+.lp-card {
+  background: #fff;
+  border-radius: var(--radius);
+  box-shadow: var(--card-shadow);
+  transition: box-shadow var(--transition);
+}
+
+.lp-card:hover {
+  box-shadow: var(--card-shadow-hover);
+}
+
+.section-header {
+  border-radius: var(--radius);
+  border-left: 4px solid var(--primary);
+  font-weight: 600;
+  font-size: 1.05rem;
+  background: #fff;
+}
+
+/* ---------------------------------------------------------------
+   Filas de issue
+   --------------------------------------------------------------- */
+
+.issue-table {
+  --table-border-color: #e6eaf1;
+}
+
+.issue-row {
+  cursor: pointer;
+  transition: background 0.12s ease;
+}
+
+.issue-row:hover {
+  background: #f4f7fb;
+}
+
+.issue-cell {
+  padding: 9px 12px;
+  vertical-align: middle;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  max-width: 0;
+}
+
+.issue-title-cell {
+  white-space: normal;
+}
+
+.issue-identifier {
+  font-size: 0.78rem;
+  color: var(--inv-muted);
+  font-variant-numeric: tabular-nums;
+}
+
+.issue-title {
+  font-size: 0.88rem;
+  color: #16243d;
+}
+
+.issue-title-input {
+  background: transparent;
+  border: none;
+  border-bottom: 1px solid transparent;
+  color: #16243d;
+  font-size: 0.88rem;
+  padding: 2px 0;
+  width: 100%;
+}
+
+.issue-title-input:focus {
+  outline: none;
+  border-bottom-color: var(--inv-blue);
+}
+
+/* ---------------------------------------------------------------
+   Agrupación por estado
+   --------------------------------------------------------------- */
+
+.group-header {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 8px 16px;
+  background: #f0f3f8;
+  border-top: 1px solid #e6eaf1;
+  border-bottom: 1px solid #e6eaf1;
+  font-size: 0.8rem;
+  font-weight: 600;
+  color: var(--inv-muted);
+}
+
+/* ---------------------------------------------------------------
+   Avatares y etiquetas
+   --------------------------------------------------------------- */
+
+.avatar {
+  width: 24px;
+  height: 24px;
+  border-radius: 50%;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 0.68rem;
+  font-weight: 600;
+  color: #fff;
+  flex-shrink: 0;
+  letter-spacing: 0.02em;
+}
+
+.avatar-lg {
+  width: 34px;
+  height: 34px;
+  font-size: 0.82rem;
+}
+
+.avatar-unassigned {
+  background: #eef1f6;
+  border: 1px dashed #c3cbd9;
+  color: var(--inv-muted);
+}
+
+.label-chip {
+  display: inline-flex;
+  align-items: center;
+  gap: 5px;
+  font-size: 0.72rem;
+  padding: 1px 8px;
+  border-radius: 10px;
+  background: #eef1f6;
+  color: var(--inv-muted);
+  border: 1px solid #e0e5ee;
+}
+
+.label-dot {
+  width: 7px;
+  height: 7px;
+  border-radius: 50%;
+  flex-shrink: 0;
+}
+
+/* ---------------------------------------------------------------
+   Kanban
+   --------------------------------------------------------------- */
+
+.board {
+  display: flex;
+  gap: 12px;
+  overflow-x: auto;
+  align-items: flex-start;
+}
+
+.board-column {
+  width: 300px;
+  flex-shrink: 0;
+  background: #f5f7fb;
+  border: 1px solid #e0e5ee;
+  border-radius: 10px;
+  display: flex;
+  flex-direction: column;
+  max-height: calc(100vh - 200px);
+}
+
+.board-column-header {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 10px 12px;
+  border-bottom: 1px solid #e0e5ee;
+  font-size: 0.8rem;
+  font-weight: 600;
+  color: var(--inv-muted);
+}
+
+.board-column-body {
+  padding: 8px;
+  overflow-y: auto;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  min-height: 80px;
+}
+
+.board-column.drag-over {
+  outline: 2px dashed var(--inv-blue);
+  outline-offset: -2px;
+}
+
+.board-card {
+  background: #fff;
+  border: 1px solid #e0e5ee;
+  border-radius: 8px;
+  padding: 10px;
+  cursor: grab;
+  box-shadow: var(--card-shadow);
+  transition: border-color 0.12s ease;
+}
+
+.board-card:hover {
+  border-color: #b9c4d6;
+}
+
+.board-card:active {
+  cursor: grabbing;
+}
+
+.board-card.dragging {
+  opacity: 0.4;
+}
+
+.board-card-title {
+  font-size: 0.85rem;
+  color: #16243d;
+  margin: 6px 0 8px;
+}
+
+/* ---------------------------------------------------------------
+   Barra de progreso
+   --------------------------------------------------------------- */
+
+.progress-lp {
+  height: 6px;
+  background: #e3e8f0;
+  border-radius: 3px;
+  overflow: hidden;
+}
+
+.progress-lp-bar {
+  height: 100%;
+  background: var(--inv-blue);
+  border-radius: 3px;
+  transition: width 0.3s ease;
+}
+
+/* ---------------------------------------------------------------
+   Detalle de issue
+   --------------------------------------------------------------- */
+
+.detail-grid {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) 300px;
+  gap: 32px;
+}
+
+.detail-title {
+  font-size: 1.5rem;
+  font-weight: 700;
+  line-height: 1.3;
+  margin: 0;
+  color: #16243d;
+}
+
+.detail-description {
+  color: var(--inv-muted);
+  font-size: 0.9rem;
+  white-space: pre-wrap;
+  line-height: 1.65;
+}
+
+.detail-section-title {
+  font-size: 0.72rem;
+  font-weight: 600;
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+  color: var(--inv-muted);
+  margin-bottom: 8px;
+}
+
+.prop-row {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 8px;
+  padding: 5px 0;
+  font-size: 0.85rem;
+}
+
+.prop-label {
+  color: var(--inv-muted);
+}
+
+.prop-select {
+  background: transparent;
+  border: 1px solid transparent;
+  border-radius: 6px;
+  color: #16243d;
+  font-size: 0.85rem;
+  padding: 3px 6px;
+  max-width: 170px;
+  cursor: pointer;
+}
+
+.prop-select:hover,
+.prop-select:focus {
+  background: #f4f7fb;
+  border-color: #e0e5ee;
+  outline: none;
+}
+
+.comment {
+  display: flex;
+  gap: 12px;
+  padding: 14px 0;
+  border-top: 1px solid #e6eaf1;
+}
+
+.comment-body {
+  font-size: 0.88rem;
+  color: var(--inv-muted);
+  white-space: pre-wrap;
+}
+
+/* ---------------------------------------------------------------
+   Estados vacíos y loading
+   --------------------------------------------------------------- */
+
+.empty-state {
+  text-align: center;
+  padding: 64px 24px;
+  color: var(--inv-muted);
+}
+
+.empty-state-icon {
+  font-size: 1.8rem;
+  margin-bottom: 12px;
+  opacity: 0.6;
+}
+
+.skeleton {
+  background: linear-gradient(90deg, #e9edf4 25%, #f3f6fa 50%, #e9edf4 75%);
+  background-size: 200% 100%;
+  animation: lp-shimmer 1.4s infinite;
+  border-radius: 4px;
+}
+
+@keyframes lp-shimmer {
+  0% {
+    background-position: 200% 0;
+  }
+  100% {
+    background-position: -200% 0;
+  }
+}
+
+/* ---------------------------------------------------------------
+   Command palette (Cmd/Ctrl + K)
+   --------------------------------------------------------------- */
+
+.palette-backdrop {
+  position: fixed;
+  inset: 0;
+  background: rgba(22, 36, 61, 0.45);
+  z-index: 1050;
+  display: flex;
+  justify-content: center;
+  padding-top: 12vh;
+}
+
+.palette {
+  width: min(620px, 92vw);
+  background: #fff;
+  border-radius: var(--radius);
+  overflow: hidden;
+  box-shadow: 0 24px 60px rgba(22, 36, 61, 0.28);
+}
+
+.palette-input {
+  width: 100%;
+  background: transparent;
+  border: none;
+  border-bottom: 1px solid #e6eaf1;
+  color: #16243d;
+  font-size: 0.95rem;
+  padding: 14px 16px;
+}
+
+.palette-input:focus {
+  outline: none;
+}
+
+.palette-list {
+  max-height: 340px;
+  overflow-y: auto;
+  padding: 6px;
+  margin: 0;
+  list-style: none;
+}
+
+.palette-item {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 8px 10px;
+  border-radius: 7px;
+  cursor: pointer;
+  font-size: 0.88rem;
+  color: var(--inv-muted);
+}
+
+.palette-item.selected {
+  background: #e8f0fd;
+  color: #16243d;
+}
+
+.palette-item i {
+  width: 18px;
+  text-align: center;
+  flex-shrink: 0;
+}
+
+/* ---------------------------------------------------------------
+   Filtros
+   --------------------------------------------------------------- */
+
+.filter-bar {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  flex-wrap: wrap;
+}
+
+.filter-chip {
+  display: inline-flex;
+  align-items: center;
+  gap: 5px;
+  font-size: 0.78rem;
+  padding: 3px 10px;
+  border-radius: 6px;
+  border: 1px solid #e0e5ee;
+  background: #fff;
+  color: var(--inv-muted);
+  transition: all 0.12s ease;
+}
+
+.filter-chip:hover {
+  background: #f4f7fb;
+  color: #16243d;
+}
+
+.filter-chip.active {
+  background: #e8f0fd;
+  border-color: var(--inv-blue);
+  color: var(--primary);
+}
+
+/* ---------------------------------------------------------------
+   Botones
+   --------------------------------------------------------------- */
+
+.btn-lp {
+  --bs-btn-bg: #fff;
+  --bs-btn-border-color: #dbe1ec;
+  --bs-btn-color: #16243d;
+  --bs-btn-hover-bg: #f4f7fb;
+  --bs-btn-hover-border-color: #c3cbd9;
+  --bs-btn-hover-color: #16243d;
+  --bs-btn-active-bg: #eaeff7;
+  --bs-btn-active-color: #16243d;
+  --bs-btn-focus-shadow-rgb: 1, 95, 201;
+  font-size: 0.82rem;
+}
+
+.btn-accent {
+  --bs-btn-bg: var(--inv-blue);
+  --bs-btn-border-color: var(--inv-blue);
+  --bs-btn-color: #fff;
+  --bs-btn-hover-bg: #014ea3;
+  --bs-btn-hover-border-color: #014ea3;
+  --bs-btn-hover-color: #fff;
+  --bs-btn-active-bg: #014a99;
+  --bs-btn-active-border-color: #014a99;
+  --bs-btn-focus-shadow-rgb: 1, 95, 201;
+  font-size: 0.82rem;
+}
+
+/* ---------------------------------------------------------------
+   Login
+   --------------------------------------------------------------- */
+
+.login-page .sidenav {
+  background: var(--primary);
+}
+
+.login-page .login-main-text {
+  padding: 60px 40px;
+  color: #fff;
+}
+
+.login-page .login-main-text img {
+  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
+  width: 80px;
+  height: 80px;
+  object-fit: contain;
+}
+
+/* ---------------------------------------------------------------
+   Responsive
+   --------------------------------------------------------------- */
+
+@media screen and (max-width: 767px) {
+  .sam-shell .sam-sidebar {
+    width: var(--sidebar-expanded);
+    transform: translateX(-100%);
+  }
+
+  .sam-shell.open .sam-sidebar {
+    transform: translateX(0);
+  }
+
+  .sam-shell .home-section,
+  .sam-shell.open .home-section {
+    margin-left: 0;
+  }
+
+  .detail-grid {
+    grid-template-columns: 1fr;
+    gap: 24px;
+  }
+
+  .issue-cell-secondary {
+    display: none;
+  }
+}
+
+@media screen and (min-width: 768px) {
+  .login-page .sidenav {
+    width: 40%;
+    position: fixed;
+    top: 0;
+    left: 0;
+    height: 100vh;
+  }
+
+  .login-page .main {
+    margin-left: 40%;
+  }
+}
diff --git a/src/app/inbox/page.tsx b/src/app/inbox/page.tsx
new file mode 100644
index 0000000..9c6c362
--- /dev/null
+++ b/src/app/inbox/page.tsx
@@ -0,0 +1,69 @@
+"use client";
+
+import { useEffect, useMemo, useState } from "react";
+import { api } from "@/lib/api";
+import type { Issue } from "@/lib/types";
+import { useAuth } from "@/lib/auth";
+import { AppShell } from "@/components/layout/AppShell";
+import { IssueList } from "@/components/issues/IssueList";
+
+/**
+ * Bandeja personal: los issues abiertos asignados al usuario en sesión,
+ * ordenados por prioridad y fecha de actualización.
+ */
+export default function InboxPage() {
+  const { user } = useAuth();
+  const [issues, setIssues] = useState<Issue[]>([]);
+  const [loading, setLoading] = useState(true);
+
+  const userId = user?.id;
+
+  useEffect(() => {
+    // Sin sesión todavía no hay a quién filtrar.
+    if (!userId) return;
+
+    let cancelled = false;
+
+    void api.listIssues({ assigneeId: [userId] }).then((result) => {
+      if (!cancelled) {
+        setIssues(result);
+        setLoading(false);
+      }
+    });
+
+    return () => {
+      cancelled = true;
+    };
+  }, [userId]);
+
+  const openIssues = useMemo(() => {
+    const open = issues.filter((issue) => issue.status !== "done" && issue.status !== "canceled");
+
+    // Mayor prioridad primero; dentro de un mismo nivel, lo más reciente.
+    return [...open].sort((a, b) => {
+      if (a.priority !== b.priority) return b.priority - a.priority;
+      return b.updatedAt.localeCompare(a.updatedAt);
+    });
+  }, [issues]);
+
+  return (
+    <AppShell title="Bandeja" subtitle={user?.name}>
+      <div className="filter-bar px-4 py-3 border-bottom">
+        <span style={{ fontSize: "0.85rem", color: "var(--inv-muted)" }}>
+          {openIssues.length}{" "}
+          {openIssues.length === 1 ? "issue abierto asignado" : "issues abiertos asignados"} a ti
+        </span>
+      </div>
+
+      <div className="page-pad pt-3">
+        <IssueList
+          issues={openIssues}
+          loading={loading || !userId}
+          groupBy="status"
+          emptyTitle="Bandeja limpia"
+          emptyDescription="No tienes issues abiertos asignados."
+        />
+      </div>
+    </AppShell>
+  );
+}
diff --git a/src/app/issues/[id]/page.tsx b/src/app/issues/[id]/page.tsx
new file mode 100644
index 0000000..81df2e5
--- /dev/null
+++ b/src/app/issues/[id]/page.tsx
@@ -0,0 +1,336 @@
+"use client";
+
+import Link from "next/link";
+import { useParams, useRouter } from "next/navigation";
+import { useCallback, useEffect, useState } from "react";
+import { api } from "@/lib/api";
+import type { Comment, Issue, IssueStatus } from "@/lib/types";
+import { PRIORITY_META, STATUS_META, STATUS_ORDER, TYPE_META } from "@/lib/meta";
+import { formatLongDate, formatRelative } from "@/lib/format";
+import { useReference, useReferenceLookups } from "@/lib/store";
+import { useAuth } from "@/lib/auth";
+import { AppShell } from "@/components/layout/AppShell";
+import { Avatar } from "@/components/ui/Avatar";
+import { EmptyState } from "@/components/ui/EmptyState";
+import { TypeIcon } from "@/components/ui/Icons";
+
+/**
+ * Detalle de un issue: descripción, propiedades editables y comentarios.
+ *
+ * Carga el issue por id y lo mantiene en estado local, de modo que cada
+ * cambio de propiedad se refleja al instante sin volver a consultar.
+ */
+export default function IssueDetailPage() {
+  const params = useParams<{ id: string }>();
+  const issueId = params.id;
+
+  return (
+    <AppShell title="Issue" subtitle={`#${issueId}`}>
+      <IssueDetail issueId={issueId} />
+    </AppShell>
+  );
+}
+
+function IssueDetail({ issueId }: { issueId: string }) {
+  const router = useRouter();
+  const { user } = useAuth();
+  const { users, projects, cycles, labels } = useReference();
+  const { projectById, userById } = useReferenceLookups();
+
+  const [issue, setIssue] = useState<Issue | null>(null);
+  const [comments, setComments] = useState<Comment[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [draft, setDraft] = useState("");
+
+  const load = useCallback(async () => {
+    setLoading(true);
+    const [found, issueComments] = await Promise.all([
+      api.getIssue(issueId),
+      api.listComments(issueId),
+    ]);
+
+    setIssue(found);
+    setComments(issueComments);
+    setLoading(false);
+  }, [issueId]);
+
+  useEffect(() => {
+    void load();
+  }, [load]);
+
+  /** Aplica un parche al issue local y lo persiste en segundo plano. */
+  async function patch(partial: Partial<Issue>) {
+    if (!issue) return;
+
+    // Actualización optimista.
+    setIssue((current) => (current ? { ...current, ...partial } : current));
+
+    try {
+      const updated = await api.updateIssue(issue.id, partial);
+      setIssue(updated);
+    } catch {
+      // Revertir si el backend rechaza el cambio.
+      void load();
+    }
+  }
+
+  async function handleComment(event: React.FormEvent) {
+    event.preventDefault();
+    const body = draft.trim();
+    // Sin sesión no hay autor válido: el backend lo rechazaría.
+    if (!body || !user) return;
+
+    setDraft("");
+    const created = await api.addComment(issueId, body, user.id);
+    setComments((current) => [...current, created]);
+  }
+
+  if (loading) {
+    return (
+      <div className="p-4">
+        <div className="skeleton mb-3" style={{ height: 28, width: "60%" }} />
+        <div className="skeleton mb-2" style={{ height: 14, width: "90%" }} />
+        <div className="skeleton" style={{ height: 14, width: "75%" }} />
+      </div>
+    );
+  }
+
+  if (!issue) {
+    return (
+      <EmptyState
+        icon="bx-error-circle"
+        title="Issue no encontrado"
+        description={`No existe el issue ${issueId}.`}
+        action={
+          <button type="button" className="btn btn-lp btn-sm" onClick={() => router.push("/issues")}>
+            Volver a Issues
+          </button>
+        }
+      />
+    );
+  }
+
+  const project = issue.projectId ? projectById.get(issue.projectId) : undefined;
+
+  return (
+    <div className="detail-grid">
+      {/* Columna principal */}
+      <div>
+        <div className="d-flex align-items-center gap-2 mb-2">
+          {project && (
+            <Link
+              href={`/projects/${project.id}`}
+              className="issue-identifier d-flex align-items-center gap-1"
+            >
+              <i className="bx bx-folder" />
+              {project.name}
+            </Link>
+          )}
+          <span className="issue-identifier">/</span>
+          <span className="issue-identifier">{issue.identifier}</span>
+        </div>
+
+        <h1 className="detail-title mb-3">{issue.title}</h1>
+
+        <div className="d-flex align-items-center gap-2 mb-4">
+          <TypeIcon type={issue.type} size={16} />
+          <span style={{ fontSize: 13, color: "var(--lp-text-muted)" }}>
+            {TYPE_META[issue.type].label}
+          </span>
+          <span style={{ color: "var(--lp-text-faint)" }}>·</span>
+          <span style={{ fontSize: 13, color: "var(--lp-text-faint)" }}>
+            Creado {formatRelative(issue.createdAt)}
+          </span>
+        </div>
+
+        <div className="detail-description mb-5">
+          {issue.description || (
+            <span style={{ color: "var(--lp-text-faint)" }}>Sin descripción.</span>
+          )}
+        </div>
+
+        {/* Comentarios */}
+        <section>
+          <div className="detail-section-title">Actividad</div>
+
+          {comments.length === 0 && (
+            <p style={{ color: "var(--lp-text-faint)", fontSize: 13 }}>
+              Sin comentarios todavía.
+            </p>
+          )}
+
+          {comments.map((comment) => {
+            const author = userById.get(comment.authorId);
+            return (
+              <div key={comment.id} className="comment">
+                <Avatar user={author} size="lg" />
+                <div className="flex-grow-1">
+                  <div className="d-flex align-items-baseline gap-2 mb-1">
+                    <span style={{ fontSize: 13, fontWeight: 600 }}>
+                      {author?.name ?? "Desconocido"}
+                    </span>
+                    <span style={{ fontSize: 12, color: "var(--lp-text-faint)" }}>
+                      {formatRelative(comment.createdAt)}
+                    </span>
+                  </div>
+                  <div className="comment-body">{comment.body}</div>
+                </div>
+              </div>
+            );
+          })}
+
+          <form onSubmit={handleComment} className="mt-3">
+            <textarea
+              className="form-control"
+              rows={3}
+              placeholder="Escribe un comentario…"
+              value={draft}
+              onChange={(event) => setDraft(event.target.value)}
+              style={{
+                background: "var(--lp-bg-elevated)",
+                border: "1px solid var(--lp-border)",
+                color: "var(--lp-text)",
+                fontSize: 13.5,
+              }}
+            />
+            <button
+              type="submit"
+              className="btn btn-accent btn-sm mt-2"
+              disabled={!draft.trim() || !user}
+            >
+              Comentar
+            </button>
+          </form>
+        </section>
+      </div>
+
+      {/* Columna de propiedades */}
+      <aside>
+        <div className="detail-section-title">Propiedades</div>
+
+        <div className="prop-row">
+          <span className="prop-label">Estado</span>
+          <select
+            className="prop-select"
+            value={issue.status}
+            onChange={(event) => patch({ status: event.target.value as IssueStatus })}
+          >
+            {STATUS_ORDER.map((status) => (
+              <option key={status} value={status}>
+                {STATUS_META[status].label}
+              </option>
+            ))}
+          </select>
+        </div>
+
+        <div className="prop-row">
+          <span className="prop-label">Prioridad</span>
+          <select
+            className="prop-select"
+            value={issue.priority}
+            onChange={(event) =>
+              patch({ priority: Number(event.target.value) as Issue["priority"] })
+            }
+          >
+            {[0, 4, 3, 2, 1].map((priority) => (
+              <option key={priority} value={priority}>
+                {PRIORITY_META[priority as Issue["priority"]].label}
+              </option>
+            ))}
+          </select>
+        </div>
+
+        <div className="prop-row">
+          <span className="prop-label">Asignado</span>
+          <select
+            className="prop-select"
+            value={issue.assigneeId ?? ""}
+            onChange={(event) => patch({ assigneeId: event.target.value || null })}
+          >
+            <option value="">Sin asignar</option>
+            {users.map((user) => (
+              <option key={user.id} value={user.id}>
+                {user.name}
+              </option>
+            ))}
+          </select>
+        </div>
+
+        <div className="prop-row">
+          <span className="prop-label">Proyecto</span>
+          <select
+            className="prop-select"
+            value={issue.projectId ?? ""}
+            onChange={(event) => patch({ projectId: event.target.value || null })}
+          >
+            <option value="">Sin proyecto</option>
+            {projects.map((projectOption) => (
+              <option key={projectOption.id} value={projectOption.id}>
+                {projectOption.name}
+              </option>
+            ))}
+          </select>
+        </div>
+
+        <div className="prop-row">
+          <span className="prop-label">Ciclo</span>
+          <select
+            className="prop-select"
+            value={issue.cycleId ?? ""}
+            onChange={(event) => patch({ cycleId: event.target.value || null })}
+          >
+            <option value="">Sin ciclo</option>
+            {cycles.map((cycleOption) => (
+              <option key={cycleOption.id} value={cycleOption.id}>
+                {cycleOption.name}
+              </option>
+            ))}
+          </select>
+        </div>
+
+        <hr className="my-3" style={{ borderColor: "var(--lp-border)" }} />
+
+        <div className="prop-row">
+          <span className="prop-label">Etiquetas</span>
+          <span className="d-flex flex-wrap gap-1 justify-content-end">
+            {issue.labelIds.length === 0 && (
+              <span style={{ fontSize: 13, color: "var(--lp-text-faint)" }}>—</span>
+            )}
+            {issue.labelIds
+              .map((id) => labels.find((l) => l.id === id))
+              .filter((label): label is NonNullable<typeof label> => Boolean(label))
+              .map((label) => (
+                <span key={label.id} className="label-chip">
+                  <span className="label-dot" style={{ background: label.color }} />
+                  {label.name}
+                </span>
+              ))}
+          </span>
+        </div>
+
+        <div className="prop-row">
+          <span className="prop-label">Creado</span>
+          <span style={{ fontSize: 13, color: "var(--lp-text-faint)" }}>
+            {formatLongDate(issue.createdAt)}
+          </span>
+        </div>
+
+        <div className="prop-row">
+          <span className="prop-label">Actualizado</span>
+          <span style={{ fontSize: 13, color: "var(--lp-text-faint)" }}>
+            {formatLongDate(issue.updatedAt)}
+          </span>
+        </div>
+
+        {issue.completedAt && (
+          <div className="prop-row">
+            <span className="prop-label">Completado</span>
+            <span style={{ fontSize: 13, color: "var(--lp-text-faint)" }}>
+              {formatLongDate(issue.completedAt)}
+            </span>
+          </div>
+        )}
+      </aside>
+    </div>
+  );
+}
diff --git a/src/app/issues/page.tsx b/src/app/issues/page.tsx
new file mode 100644
index 0000000..a00784f
--- /dev/null
+++ b/src/app/issues/page.tsx
@@ -0,0 +1,157 @@
+"use client";
+
+import { useRouter, useSearchParams } from "next/navigation";
+import { Suspense, useEffect, useState } from "react";
+import { api } from "@/lib/api";
+import type { Issue, IssueInput, IssueStatus } from "@/lib/types";
+import { STATUS_META, STATUS_ORDER } from "@/lib/meta";
+import { useIssues } from "@/hooks/useIssues";
+import { AppShell } from "@/components/layout/AppShell";
+import { IssueList } from "@/components/issues/IssueList";
+
+/**
+ * Página principal de issues.
+ *
+ * Agrupa por estado y permite filtrar. Acepta `?new=1` en la URL para abrir
+ * el formulario de creación directamente (usado por el botón «Nuevo issue» y
+ * por la palette de comandos).
+ */
+export default function IssuesPage() {
+  return (
+    <Suspense fallback={null}>
+      <IssuesPageInner />
+    </Suspense>
+  );
+}
+
+function IssuesPageInner() {
+  const router = useRouter();
+  const searchParams = useSearchParams();
+
+  const [statusFilter, setStatusFilter] = useState<IssueStatus[]>([]);
+  const [refreshKey, setRefreshKey] = useState(0);
+  const [creating, setCreating] = useState(false);
+  const [title, setTitle] = useState("");
+
+  // Abrir el formulario cuando la URL lo indica.
+  useEffect(() => {
+    if (searchParams.get("new") === "1") {
+      setCreating(true);
+      // Quitar el parámetro para no reabrirlo al navegar dentro de la página.
+      router.replace("/issues");
+    }
+  }, [searchParams, router]);
+
+  const { issues, loading } = useIssues(
+    statusFilter.length ? { status: statusFilter } : undefined,
+    refreshKey,
+  );
+
+  function toggleStatus(status: IssueStatus) {
+    setStatusFilter((current) =>
+      current.includes(status)
+        ? current.filter((s) => s !== status)
+        : [...current, status],
+    );
+  }
+
+  async function handleCreate(event: React.FormEvent) {
+    event.preventDefault();
+    const trimmed = title.trim();
+    if (!trimmed) return;
+
+    const input: IssueInput = { title: trimmed, status: "todo" };
+    await api.createIssue(input);
+
+    setTitle("");
+    setCreating(false);
+    setRefreshKey((key) => key + 1);
+  }
+
+  const actions = (
+    <div className="d-flex align-items-center gap-2">
+      {STATUS_ORDER.map((status) => (
+        <button
+          key={status}
+          type="button"
+          className={`filter-chip${statusFilter.includes(status) ? " active" : ""}`}
+          onClick={() => toggleStatus(status)}
+        >
+          <span
+            className="label-dot"
+            style={{ background: STATUS_META[status].color }}
+          />
+          {STATUS_META[status].label}
+        </button>
+      ))}
+    </div>
+  );
+
+  return (
+    <AppShell title="Issues" actions={actions}>
+      {creating && (
+        <div className="border-bottom p-3" style={{ background: "var(--lp-bg-elevated)" }}>
+          <form onSubmit={handleCreate}>
+            <input
+              autoFocus
+              className="issue-title-input"
+              style={{ fontSize: 15 }}
+              placeholder="Issue title…"
+              value={title}
+              onChange={(event) => setTitle(event.target.value)}
+              onKeyDown={(event) => {
+                if (event.key === "Escape") setCreating(false);
+              }}
+            />
+            <div className="d-flex gap-2 mt-3">
+              <button type="submit" className="btn btn-accent btn-sm" disabled={!title.trim()}>
+                Crear issue
+              </button>
+              <button
+                type="button"
+                className="btn btn-lp btn-sm"
+                onClick={() => setCreating(false)}
+              >
+                Cancelar
+              </button>
+            </div>
+          </form>
+        </div>
+      )}
+
+      {!creating && (
+        <div className="filter-bar">
+          <button type="button" className="filter-chip" onClick={() => setCreating(true)}>
+            <i className="bx bx-plus" />
+            Nuevo issue
+          </button>
+
+          {statusFilter.length > 0 && (
+            <button
+              type="button"
+              className="filter-chip"
+              onClick={() => setStatusFilter([])}
+            >
+              <i className="bx bx-x" />
+              Limpiar filtros
+            </button>
+          )}
+        </div>
+      )}
+
+      <IssueList
+        issues={issues}
+        loading={loading}
+        groupBy="status"
+        emptyTitle={
+          statusFilter.length > 0 ? "Ningún issue coincide con los filtros" : "No hay issues aquí"
+        }
+        emptyDescription={
+          statusFilter.length > 0
+            ? "Prueba a ampliar la selección de estados."
+            : "Crea un nuevo issue para empezar."
+        }
+      />
+    </AppShell>
+  );
+}
diff --git a/src/app/layout.tsx b/src/app/layout.tsx
new file mode 100644
index 0000000..0821de7
--- /dev/null
+++ b/src/app/layout.tsx
@@ -0,0 +1,35 @@
+import type { Metadata } from "next";
+import "bootstrap/dist/css/bootstrap.min.css";
+import "boxicons/css/boxicons.min.css";
+import "./globals.css";
+import { AuthProvider } from "@/lib/auth";
+import { ReferenceProvider } from "@/lib/store";
+
+export const metadata: Metadata = {
+  title: {
+    default: "Proyectos · SAM",
+    template: "%s · Proyectos · SAM",
+  },
+  description: "Gestor de proyectos estilo Linear para la plataforma SAM.",
+};
+
+/**
+ * Layout raíz.
+ *
+ * Importa Bootstrap y los iconos a nivel global (cachéados por Next entre
+ * rutas) y monta el proveedor de datos de referencia usado por todas las
+ * páginas del módulo.
+ */
+export default function RootLayout({
+  children,
+}: Readonly<{ children: React.ReactNode }>) {
+  return (
+    <html lang="es">
+      <body>
+        <AuthProvider>
+          <ReferenceProvider>{children}</ReferenceProvider>
+        </AuthProvider>
+      </body>
+    </html>
+  );
+}
diff --git a/src/app/login/page.tsx b/src/app/login/page.tsx
new file mode 100644
index 0000000..18731f0
--- /dev/null
+++ b/src/app/login/page.tsx
@@ -0,0 +1,133 @@
+"use client";
+
+import { useRouter } from "next/navigation";
+import { useEffect, useState } from "react";
+import { useAuth } from "@/lib/auth";
+
+/**
+ * Acceso al módulo. Valida contra sige_sam_v3.usuario en el backend
+ * (POST /api/proyectos/auth/login), igual que el resto de módulos SAM.
+ *
+ * Patrón visual de sam-portal / SistemaCalidad: sidenav azul con la marca
+ * a la izquierda y la tarjeta de acceso a la derecha.
+ */
+export default function LoginPage() {
+  const router = useRouter();
+  const { user, loading, login } = useAuth();
+
+  const [idUsuario, setIdUsuario] = useState("");
+  const [password, setPassword] = useState("");
+  const [error, setError] = useState<string | null>(null);
+  const [submitting, setSubmitting] = useState(false);
+
+  // Si ya hay sesión, no tiene sentido mostrar el login.
+  useEffect(() => {
+    if (!loading && user) router.replace("/inbox");
+  }, [loading, user, router]);
+
+  async function handleSubmit(event: React.FormEvent) {
+    event.preventDefault();
+    if (submitting) return;
+
+    setError(null);
+    setSubmitting(true);
+
+    try {
+      await login(idUsuario, password);
+      router.push("/inbox");
+    } catch (err) {
+      setError(err instanceof Error ? err.message : "Error al ingresar");
+      setSubmitting(false);
+    }
+  }
+
+  return (
+    <div className="login-page">
+      <div className="container-fluid">
+        <div className="row min-vh-100">
+          {/* Marca */}
+          <div className="col-md-5 sidenav d-flex flex-column justify-content-center">
+            <div className="login-main-text text-center">
+              <i className="bx bx-briefcase" style={{ fontSize: "5rem" }} />
+              <h1 className="fw-bold mt-3">Proyectos</h1>
+              <p className="mb-0" style={{ opacity: 0.8 }}>
+                Gestión de proyectos · SAM
+              </p>
+              <p style={{ opacity: 0.5, fontSize: "0.85rem" }}>
+                Organismo Técnico de Capacitación
+              </p>
+            </div>
+          </div>
+
+          {/* Formulario */}
+          <div className="col-md-7 d-flex align-items-center justify-content-center">
+            <div className="lp-card p-4 p-md-5" style={{ maxWidth: 420, width: "100%" }}>
+              <h2 className="h5 fw-bold mb-1">Acceso al sistema</h2>
+              <p className="small mb-4" style={{ color: "var(--inv-muted)" }}>
+                Use su RUT y clave del sistema central (SIGE).
+              </p>
+
+              <form onSubmit={handleSubmit}>
+                {error && (
+                  <div className="alert alert-danger d-flex align-items-center gap-2 py-2" role="alert">
+                    <i className="bx bx-error" />
+                    <span className="small">{error}</span>
+                  </div>
+                )}
+
+                <div className="mb-3">
+                  <label htmlFor="idUsuario" className="form-label">
+                    Usuario (RUT o legajo)
+                  </label>
+                  <input
+                    type="text"
+                    id="idUsuario"
+                    className="form-control"
+                    autoComplete="username"
+                    value={idUsuario}
+                    onChange={(event) => setIdUsuario(event.target.value)}
+                    required
+                    autoFocus
+                  />
+                </div>
+
+                <div className="mb-4">
+                  <label htmlFor="password" className="form-label">
+                    Clave
+                  </label>
+                  <input
+                    type="password"
+                    id="password"
+                    className="form-control"
+                    autoComplete="current-password"
+                    value={password}
+                    onChange={(event) => setPassword(event.target.value)}
+                    required
+                  />
+                </div>
+
+                <button
+                  type="submit"
+                  className="btn btn-accent w-100 py-2 d-flex align-items-center justify-content-center gap-2"
+                  disabled={submitting}
+                >
+                  {submitting ? (
+                    <>
+                      <span className="spinner-border spinner-border-sm" role="status" />
+                      Verificando…
+                    </>
+                  ) : (
+                    <>
+                      <i className="bx bx-log-in" />
+                      Ingresar
+                    </>
+                  )}
+                </button>
+              </form>
+            </div>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/src/app/page.tsx b/src/app/page.tsx
new file mode 100644
index 0000000..4841917
--- /dev/null
+++ b/src/app/page.tsx
@@ -0,0 +1,8 @@
+import { redirect } from "next/navigation";
+
+/**
+ * La raíz redirige a la bandeja, que es la página de inicio del módulo.
+ */
+export default function Home() {
+  redirect("/inbox");
+}
diff --git a/src/app/projects/[id]/page.tsx b/src/app/projects/[id]/page.tsx
new file mode 100644
index 0000000..2741f28
--- /dev/null
+++ b/src/app/projects/[id]/page.tsx
@@ -0,0 +1,132 @@
+"use client";
+
+import { useParams } from "next/navigation";
+import { useEffect, useState } from "react";
+import { api } from "@/lib/api";
+import type { Issue, Project } from "@/lib/types";
+import { PROJECT_STATUS_META } from "@/lib/meta";
+import { formatLongDate, percent } from "@/lib/format";
+import { useReferenceLookups } from "@/lib/store";
+import { useIssues } from "@/hooks/useIssues";
+import { AppShell } from "@/components/layout/AppShell";
+import { IssueList } from "@/components/issues/IssueList";
+import { Avatar } from "@/components/ui/Avatar";
+import { EmptyState } from "@/components/ui/EmptyState";
+import { ProgressBar } from "@/components/ui/ProgressBar";
+
+/**
+ * Detalle de un proyecto: cabecera con estado, lead y progreso, más la lista
+ * de issues filtrada por proyecto.
+ */
+export default function ProjectDetailPage() {
+  const params = useParams<{ id: string }>();
+  const projectId = params.id;
+
+  const [project, setProject] = useState<Project | null>(null);
+  const [loading, setLoading] = useState(true);
+  const { userById } = useReferenceLookups();
+  const { issues, loading: issuesLoading } = useIssues({ projectId: [projectId] });
+
+  useEffect(() => {
+    let cancelled = false;
+
+    void api.listProjects().then((projects) => {
+      if (!cancelled) {
+        setProject(projects.find((p) => p.id === projectId) ?? null);
+        setLoading(false);
+      }
+    });
+
+    return () => {
+      cancelled = true;
+    };
+  }, [projectId]);
+
+  if (loading) {
+    return (
+      <AppShell title="Proyecto">
+        <div className="p-4">
+          <div className="skeleton mb-3" style={{ height: 28, width: "40%" }} />
+          <div className="skeleton" style={{ height: 14, width: "70%" }} />
+        </div>
+      </AppShell>
+    );
+  }
+
+  if (!project) {
+    return (
+      <AppShell title="Proyecto">
+        <EmptyState
+          icon="bx-folder-x"
+          title="Proyecto no encontrado"
+          description={`No existe el proyecto ${projectId}.`}
+        />
+      </AppShell>
+    );
+  }
+
+  const lead = project.leadId ? userById.get(project.leadId) : undefined;
+  const meta = PROJECT_STATUS_META[project.status];
+  const doneCount = issues.filter((issue) => issue.status === "done").length;
+
+  return (
+    <AppShell title={project.name} subtitle={project.key}>
+      <div className="p-4 border-bottom" style={{ borderColor: "var(--lp-border)" }}>
+        <div className="d-flex align-items-center gap-2 mb-2">
+          <span className="label-chip" style={{ color: meta.color }}>
+            <i className={`bx ${meta.icon}`} />
+            {meta.label}
+          </span>
+
+          <span className="ms-auto d-flex align-items-center gap-2">
+            {lead && (
+              <>
+                <Avatar user={lead} />
+                <span style={{ fontSize: 13, color: "var(--lp-text-muted)" }}>{lead.name}</span>
+              </>
+            )}
+          </span>
+        </div>
+
+        <p style={{ fontSize: 14, color: "var(--lp-text-muted)", maxWidth: 760 }}>
+          {project.description}
+        </p>
+
+        <div className="row g-4 mt-1">
+          <div className="col-md-6">
+            <ProgressBar
+              value={percent(doneCount, issues.length)}
+              label={`Progreso · ${doneCount}/${issues.length} issues`}
+            />
+          </div>
+
+          <div className="col-md-6">
+            <div className="d-flex gap-5">
+              {project.startDate && (
+                <div>
+                  <div className="detail-section-title">Inicio</div>
+                  <div style={{ fontSize: 13 }}>{formatLongDate(project.startDate)}</div>
+                </div>
+              )}
+
+              {project.targetDate && (
+                <div>
+                  <div className="detail-section-title">Fecha objetivo</div>
+                  <div style={{ fontSize: 13 }}>{formatLongDate(project.targetDate)}</div>
+                </div>
+              )}
+            </div>
+          </div>
+        </div>
+      </div>
+
+      <IssueList
+        issues={issues}
+        loading={issuesLoading}
+        groupBy="status"
+        emptyTitle="Este proyecto aún no tiene issues"
+        emptyDescription="Crea un issue nuevo y asíignalo a este proyecto."
+      />
+    </AppShell>
+  );
+}
diff --git a/src/app/projects/page.tsx b/src/app/projects/page.tsx
new file mode 100644
index 0000000..adf5062
--- /dev/null
+++ b/src/app/projects/page.tsx
@@ -0,0 +1,135 @@
+"use client";
+
+import Link from "next/link";
+import { useEffect, useMemo, useState } from "react";
+import { api } from "@/lib/api";
+import type { Issue, Project } from "@/lib/types";
+import { PROJECT_STATUS_META } from "@/lib/meta";
+import { formatShortDate, percent } from "@/lib/format";
+import { useReferenceLookups } from "@/lib/store";
+import { AppShell } from "@/components/layout/AppShell";
+import { Avatar } from "@/components/ui/Avatar";
+import { EmptyState } from "@/components/ui/EmptyState";
+import { ProgressBar } from "@/components/ui/ProgressBar";
+
+/**
+ * Listado de proyectos con su progreso calculado a partir de los issues
+ * completados sobre el total.
+ */
+export default function ProjectsPage() {
+  const [projects, setProjects] = useState<Project[]>([]);
+  const [issues, setIssues] = useState<Issue[]>([]);
+  const [loading, setLoading] = useState(true);
+  const { userById } = useReferenceLookups();
+
+  useEffect(() => {
+    let cancelled = false;
+
+    void Promise.all([api.listProjects(), api.listIssues()]).then(([projectData, issueData]) => {
+      if (!cancelled) {
+        setProjects(projectData);
+        setIssues(issueData);
+        setLoading(false);
+      }
+    });
+
+    return () => {
+      cancelled = true;
+    };
+  }, []);
+
+  const progressByProject = useMemo(() => {
+    const map = new Map<string, { total: number; done: number }>();
+
+    for (const issue of issues) {
+      if (!issue.projectId) continue;
+      const entry = map.get(issue.projectId) ?? { total: 0, done: 0 };
+      entry.total += 1;
+      if (issue.status === "done") entry.done += 1;
+      map.set(issue.projectId, entry);
+    }
+
+    return map;
+  }, [issues]);
+
+  return (
+    <AppShell title="Proyectos">
+      {loading && (
+        <div className="p-4">
+          {Array.from({ length: 3 }).map((_, index) => (
+            <div key={index} className="skeleton mb-3" style={{ height: 88, borderRadius: 10 }} />
+          ))}
+        </div>
+      )}
+
+      {!loading && projects.length === 0 && (
+        <EmptyState
+          icon="bx-folder"
+          title="No hay proyectos"
+          description="Crea un proyecto para agrupar issues relacionados."
+        />
+      )}
+
+      {!loading && (
+        <div className="p-4 d-flex flex-column gap-3">
+          {projects.map((project) => {
+            const progress = progressByProject.get(project.id) ?? { total: 0, done: 0 };
+            const lead = project.leadId ? userById.get(project.leadId) : undefined;
+            const meta = PROJECT_STATUS_META[project.status];
+
+            return (
+              <Link
+                key={project.id}
+                href={`/projects/${project.id}`}
+                className="border rounded-3 p-3 text-decoration-none"
+                style={{
+                  background: "var(--lp-bg-elevated)",
+                  borderColor: "var(--lp-border)",
+                  display: "block",
+                }}
+              >
+                <div className="d-flex align-items-center gap-2 mb-1">
+                  <span style={{ fontWeight: 600, fontSize: 14, color: "var(--lp-text)" }}>
+                    {project.name}
+                  </span>
+                  <span className="issue-identifier">{project.key}</span>
+                  <span className="label-chip ms-1" style={{ color: meta.color }}>
+                    <i className={`bx ${meta.icon}`} />
+                    {meta.label}
+                  </span>
+
+                  <span className="ms-auto d-flex align-items-center gap-2">
+                    <span style={{ fontSize: 12.5, color: "var(--lp-text-faint)" }}>
+                      {progress.done}/{progress.total}
+                    </span>
+                    <Avatar user={lead} />
+                  </span>
+                </div>
+
+                <p
+                  className="mb-3"
+                  style={{ fontSize: 13, color: "var(--lp-text-muted)", maxWidth: 720 }}
+                >
+                  {project.description}
+                </p>
+
+                <div className="d-flex align-items-center gap-3">
+                  <div className="flex-grow-1">
+                    <ProgressBar value={percent(progress.done, progress.total)} />
+                  </div>
+
+                  {project.targetDate && (
+                    <span style={{ fontSize: 12, color: "var(--lp-text-faint)", whiteSpace: "nowrap" }}>
+                      <i className="bx bx-calendar me-1" />
+                      {formatShortDate(project.targetDate)}
+                    </span>
+                  )}
+                </div>
+              </Link>
+            );
+          })}
+        </div>
+      )}
+    </AppShell>
+  );
+}
diff --git a/src/components/board/Board.tsx b/src/components/board/Board.tsx
new file mode 100644
index 0000000..775f7ae
--- /dev/null
+++ b/src/components/board/Board.tsx
@@ -0,0 +1,159 @@
+"use client";
+
+import { useRouter } from "next/navigation";
+import { useState } from "react";
+import { STATUS_META, STATUS_ORDER } from "@/lib/meta";
+import type { Issue, IssueStatus } from "@/lib/types";
+import { useReferenceLookups } from "@/lib/store";
+import { Avatar } from "@/components/ui/Avatar";
+import { PriorityIcon, StatusIcon } from "@/components/ui/Icons";
+
+interface BoardProps {
+  issues: Issue[];
+  loading?: boolean;
+  /** Invocado al soltar una tarjeta en otra columna. */
+  onMove?: (issueId: string, status: IssueStatus) => void;
+}
+
+/**
+ * Tablero Kanban con arrastrar y soltar nativo del navegador (HTML5 DnD).
+ *
+ * No depende de librerías externas: cada tarjeta arrastrable transmite su id
+ * y cada columna actúa como zona de destino, actualizando el estado del issue
+ * al soltar.
+ */
+export function Board({ issues, loading, onMove }: BoardProps) {
+  const router = useRouter();
+  const { userById, projectById, labelById } = useReferenceLookups();
+  const [draggingId, setDraggingId] = useState<string | null>(null);
+  const [overStatus, setOverStatus] = useState<IssueStatus | null>(null);
+
+  function handleDrop(event: React.DragEvent, status: IssueStatus) {
+    event.preventDefault();
+    const issueId = event.dataTransfer.getData("text/plain");
+
+    if (issueId) onMove?.(issueId, status);
+
+    setDraggingId(null);
+    setOverStatus(null);
+  }
+
+  return (
+    <div className="board">
+      {STATUS_ORDER.map((status) => {
+        const columnIssues = issues.filter((issue) => issue.status === status);
+        const meta = STATUS_META[status];
+
+        return (
+          <div
+            key={status}
+            className={`board-column${overStatus === status ? " drag-over" : ""}`}
+            onDragOver={(event) => {
+              event.preventDefault();
+              setOverStatus(status);
+            }}
+            onDragLeave={(event) => {
+              // Ignorar eventos que salen hacia un hijo de la columna.
+              if (!event.currentTarget.contains(event.relatedTarget as Node)) {
+                setOverStatus(null);
+              }
+            }}
+            onDrop={(event) => handleDrop(event, status)}
+          >
+            <div className="board-column-header">
+              <StatusIcon status={status} />
+              <span>{meta.label}</span>
+              <span className="ms-auto" style={{ color: "var(--lp-text-faint)" }}>
+                {columnIssues.length}
+              </span>
+            </div>
+
+            <div className="board-column-body">
+              {loading &&
+                Array.from({ length: 2 }).map((_, index) => (
+                  <div key={index} className="skeleton" style={{ height: 76, borderRadius: 8 }} />
+                ))}
+
+              {!loading && columnIssues.length === 0 && (
+                <div
+                  className="text-center py-4"
+                  style={{ color: "var(--lp-text-faint)", fontSize: 12.5 }}
+                >
+                  Arrastra un issue aquí
+                </div>
+              )}
+
+              {!loading &&
+                columnIssues.map((issue) => {
+                  const assignee = issue.assigneeId
+                    ? userById.get(issue.assigneeId)
+                    : undefined;
+                  const project = issue.projectId
+                    ? projectById.get(issue.projectId)
+                    : undefined;
+
+                  return (
+                    <article
+                      key={issue.id}
+                      className={`board-card${draggingId === issue.id ? " dragging" : ""}`}
+                      draggable
+                      onDragStart={(event) => {
+                        event.dataTransfer.setData("text/plain", issue.id);
+                        event.dataTransfer.effectAllowed = "move";
+                        setDraggingId(issue.id);
+                      }}
+                      onDragEnd={() => {
+                        setDraggingId(null);
+                        setOverStatus(null);
+                      }}
+                      onClick={() => router.push(`/issues/${issue.id}`)}
+                    >
+                      <div className="d-flex align-items-center gap-2">
+                        <span className="issue-identifier">{issue.identifier}</span>
+                        {project && (
+                          <span
+                            className="text-truncate"
+                            style={{ fontSize: 11.5, color: "var(--lp-text-faint)" }}
+                          >
+                            {project.name}
+                          </span>
+                        )}
+                        <span className="ms-auto">
+                          <PriorityIcon priority={issue.priority} size={13} />
+                        </span>
+                      </div>
+
+                      <div className="board-card-title">{issue.title}</div>
+
+                      <div className="d-flex align-items-center">
+                        {issue.labelIds
+                          .map((id) => labelById.get(id))
+                          .filter((label): label is NonNullable<typeof label> => Boolean(label))
+                          .slice(0, 2)
+                          .map((label) => (
+                            <span
+                              key={label.id}
+                              className="label-chip me-1"
+                              style={{ fontSize: 10.5 }}
+                            >
+                              <span
+                                className="label-dot"
+                                style={{ background: label.color }}
+                              />
+                              {label.name}
+                            </span>
+                          ))}
+                        <span className="ms-auto">
+                          <Avatar user={assignee} />
+                        </span>
+                      </div>
+                    </article>
+                  );
+                })}
+            </div>
+          </div>
+        );
+      })}
+    </div>
+  );
+}
diff --git a/src/components/issues/IssueList.tsx b/src/components/issues/IssueList.tsx
new file mode 100644
index 0000000..a500062
--- /dev/null
+++ b/src/components/issues/IssueList.tsx
@@ -0,0 +1,145 @@
+"use client";
+
+import { STATUS_META, STATUS_ORDER } from "@/lib/meta";
+import type { Issue } from "@/lib/types";
+import { useReferenceLookups } from "@/lib/store";
+import { EmptyState } from "@/components/ui/EmptyState";
+import { StatusIcon } from "@/components/ui/Icons";
+import { IssueRow } from "./IssueRow";
+
+interface IssueListProps {
+  issues: Issue[];
+  loading?: boolean;
+  /** Campo por el que agrupar. Por defecto, estado. */
+  groupBy?: "status" | "project" | "none";
+  /** Texto alternativo para el estado vacío (p. ej. al filtrar). */
+  emptyTitle?: string;
+  emptyDescription?: string;
+}
+
+/**
+ * Tabla de issues agrupada.
+ *
+ * Renderiza un encabezado pegajoso por grupo y delega el pintado de cada fila
+ * en `IssueRow`. Con `groupBy: "none"` emite una única tabla continua.
+ */
+export function IssueList({
+  issues,
+  loading,
+  groupBy = "status",
+  emptyTitle = "No hay issues aquí",
+  emptyDescription = "Crea un nuevo issue para empezar.",
+}: IssueListProps) {
+  const { projectById, userById, labelById } = useReferenceLookups();
+
+  if (loading) {
+    return <IssueListSkeleton />;
+  }
+
+  if (issues.length === 0) {
+    return (
+      <EmptyState
+        icon="bx-check-circle"
+        title={emptyTitle}
+        description={emptyDescription}
+      />
+    );
+  }
+
+  /** Tabla simple con las filas dadas. */
+  const table = (groupIssues: Issue[]) => (
+    <table className="table table-borderless issue-table mb-0">
+      <tbody>
+        {groupIssues.map((issue) => (
+          <IssueRow
+            key={issue.id}
+            issue={issue}
+            assignee={issue.assigneeId ? userById.get(issue.assigneeId) : undefined}
+            labels={issue.labelIds
+              .map((id) => labelById.get(id))
+              .filter((label): label is NonNullable<typeof label> => Boolean(label))}
+            showProject={groupBy !== "project"}
+          />
+        ))}
+      </tbody>
+    </table>
+  );
+
+  /** Encabezado de grupo pegajoso con icono y contador. */
+  const header = (icon: React.ReactNode, label: string, count: number) => (
+    <div className="group-header">
+      {icon}
+      <span>{label}</span>
+      <span style={{ color: "var(--lp-text-faint)", fontWeight: 400 }}>{count}</span>
+    </div>
+  );
+
+  if (groupBy === "none") {
+    return table(issues);
+  }
+
+  if (groupBy === "status") {
+    return (
+      <div>
+        {STATUS_ORDER.map((status) => {
+          const groupIssues = issues.filter((issue) => issue.status === status);
+          if (groupIssues.length === 0) return null;
+
+          return (
+            <section key={status}>
+              {header(
+                <StatusIcon status={status} />,
+                STATUS_META[status].label,
+                groupIssues.length,
+              )}
+              {table(groupIssues)}
+            </section>
+          );
+        })}
+      </div>
+    );
+  }
+
+  // Agrupar por proyecto, conservando el orden de aparición.
+  const projectIds = [...new Set(issues.map((issue) => issue.projectId))];
+
+  return (
+    <div>
+      {projectIds.map((projectId) => {
+        const groupIssues = issues.filter((issue) => issue.projectId === projectId);
+        const project = projectId ? projectById.get(projectId) : undefined;
+
+        return (
+          <section key={projectId ?? "none"}>
+            {header(
+              <i className="bx bx-folder" style={{ color: "var(--inv-blue)" }} />,
+              project?.name ?? "Sin proyecto",
+              groupIssues.length,
+            )}
+            {table(groupIssues)}
+          </section>
+        );
+      })}
+    </div>
+  );
+}
+
+/** Esqueleto de carga con filas fantasma, mientras llegan los datos. */
+function IssueListSkeleton() {
+  return (
+    <div className="p-3">
+      {Array.from({ length: 8 }).map((_, index) => (
+        <div key={index} className="d-flex align-items-center gap-3 py-2">
+          <div className="skeleton" style={{ width: 14, height: 14, borderRadius: "50%" }} />
+          <div className="skeleton" style={{ width: 14, height: 14, borderRadius: "50%" }} />
+          <div className="skeleton" style={{ width: 64, height: 12 }} />
+          <div className="skeleton" style={{ width: `${30 + ((index * 7) % 40)}%`, height: 12 }} />
+          <div
+            className="skeleton ms-auto"
+            style={{ width: 22, height: 22, borderRadius: "50%" }}
+          />
+        </div>
+      ))}
+    </div>
+  );
+}
diff --git a/src/components/issues/IssueRow.tsx b/src/components/issues/IssueRow.tsx
new file mode 100644
index 0000000..ad9c37d
--- /dev/null
+++ b/src/components/issues/IssueRow.tsx
@@ -0,0 +1,63 @@
+"use client";
+
+import { useRouter } from "next/navigation";
+import type { Issue, Label, User } from "@/lib/types";
+import { PRIORITY_META } from "@/lib/meta";
+import { Avatar } from "@/components/ui/Avatar";
+import { PriorityIcon, StatusIcon, TypeIcon } from "@/components/ui/Icons";
+import { LabelChip } from "@/components/ui/LabelChip";
+
+interface IssueRowProps {
+  issue: Issue;
+  assignee?: User;
+  labels: Label[];
+  /** Columnas secundarias (proyecto, ciclo) ocultas en pantallas pequeñas. */
+  showProject?: boolean;
+}
+
+/** Fila de una tabla de issues. Al hacer clic navega al detalle. */
+export function IssueRow({ issue, assignee, labels, showProject = true }: IssueRowProps) {
+  const router = useRouter();
+
+  return (
+    <tr
+      className="issue-row"
+      onClick={() => router.push(`/issues/${issue.id}`)}
+      title={PRIORITY_META[issue.priority].label}
+    >
+      <td className="issue-cell" style={{ width: 34 }}>
+        <PriorityIcon priority={issue.priority} />
+      </td>
+
+      <td className="issue-cell" style={{ width: 34 }}>
+        <StatusIcon status={issue.status} />
+      </td>
+
+      <td className="issue-cell issue-title-cell">
+        <div className="d-flex align-items-center gap-2 flex-wrap">
+          <span className="issue-identifier">{issue.identifier}</span>
+          <span className="issue-title">{issue.title}</span>
+          {labels.map((label) => (
+            <LabelChip key={label.id} label={label} />
+          ))}
+        </div>
+      </td>
+
+      {showProject && (
+        <td className="issue-cell issue-cell-secondary" style={{ width: 130 }}>
+          <span style={{ fontSize: 12.5, color: "var(--lp-text-faint)" }}>
+            {issue.type !== "task" && <TypeIcon type={issue.type} size={13} />}
+          </span>
+        </td>
+      )}
+
+      <td className="issue-cell issue-cell-secondary" style={{ width: 110 }}>
+        <span className="issue-identifier">{issue.createdAt.slice(0, 10)}</span>
+      </td>
+
+      <td className="issue-cell" style={{ width: 44 }}>
+        <Avatar user={assignee} />
+      </td>
+    </tr>
+  );
+}
diff --git a/src/components/layout/AppShell.tsx b/src/components/layout/AppShell.tsx
new file mode 100644
index 0000000..5296347
--- /dev/null
+++ b/src/components/layout/AppShell.tsx
@@ -0,0 +1,211 @@
+"use client";
+
+import { usePathname, useRouter } from "next/navigation";
+import { useCallback, useEffect, useMemo, useState } from "react";
+import { api } from "@/lib/api";
+import type { Issue } from "@/lib/types";
+import { useAuth } from "@/lib/auth";
+import { useReference } from "@/lib/store";
+import { CommandPalette } from "./CommandPalette";
+import { Sidebar } from "./Sidebar";
+
+interface AppShellProps {
+  /** Título de la sección, mostrado en el hero. */
+  title: string;
+  /** Bajada del hero. */
+  subtitle?: string;
+  /** Acciones alineadas a la derecha del hero. */
+  actions?: React.ReactNode;
+  icon?: string;
+  children: React.ReactNode;
+}
+
+/**
+ * Estructura común de todas las páginas: sidebar colapsable, hero
+ * (sam-toolbar) y palette de comandos. Patrón SamShell de la plataforma.
+ *
+ * Protege la sesión: sin usuario redirige a /login.
+ *
+ * Carga la lista completa de issues una sola vez para alimentar los
+ * contadores del sidebar y el buscador de la palette. Las páginas que
+ * necesiten issues con filtros propios hacen su consulta aparte.
+ */
+export function AppShell({ title, subtitle, actions, icon = "bx-briefcase", children }: AppShellProps) {
+  const router = useRouter();
+  const pathname = usePathname();
+  const { user, loading: authLoading, logout } = useAuth();
+  const { projects } = useReference();
+
+  const [open, setOpen] = useState(true);
+  const [issues, setIssues] = useState<Issue[]>([]);
+  const [paletteOpen, setPaletteOpen] = useState(false);
+
+  // Cargar issues solo cuando hay sesión (los endpoints exigen API key y
+  // los datos no tienen sentido anónimos).
+  useEffect(() => {
+    if (!user) return;
+    let cancelled = false;
+
+    void api.listIssues().then((result) => {
+      if (!cancelled) setIssues(result);
+    });
+
+    return () => {
+      cancelled = true;
+    };
+  }, [user]);
+
+  // Atajo global Cmd/Ctrl + K para abrir la palette.
+  useEffect(() => {
+    function onKeyDown(event: KeyboardEvent) {
+      if ((event.metaKey || event.ctrlKey) && event.key.toLowerCase() === "k") {
+        event.preventDefault();
+        setPaletteOpen((openState) => !openState);
+      }
+    }
+
+    window.addEventListener("keydown", onKeyDown);
+    return () => window.removeEventListener("keydown", onKeyDown);
+  }, []);
+
+  // Cerrar la palette al navegar.
+  useEffect(() => {
+    setPaletteOpen(false);
+  }, [pathname]);
+
+  const counts = useMemo(() => {
+    const openIssues = issues.filter((i) => i.status !== "done" && i.status !== "canceled");
+    return {
+      inbox: user ? openIssues.filter((i) => i.assigneeId === user.id).length : 0,
+      issues: openIssues.length,
+      board: openIssues.length,
+      cycles: openIssues.filter((i) => i.cycleId).length,
+      projects: projects.length,
+    };
+  }, [issues, projects, user]);
+
+  const closePalette = useCallback(() => setPaletteOpen(false), []);
+
+  const paletteIssues = useMemo(
+    () => issues.map((issue) => ({ id: issue.id, identifier: issue.identifier, title: issue.title })),
+    [issues],
+  );
+
+  // Mientras se restaura la sesión, nada que renderizar todavía.
+  if (authLoading) {
+    return (
+      <div className="d-flex align-items-center justify-content-center vh-100">
+        <div className="spinner-border" role="status" aria-label="Cargando" />
+      </div>
+    );
+  }
+
+  // Sin sesión: volver al login.
+  if (!user) {
+    router.replace("/login");
+    return (
+      <div className="d-flex align-items-center justify-content-center vh-100">
+        <div className="spinner-border" role="status" aria-label="Redirigiendo" />
+      </div>
+    );
+  }
+
+  return (
+    <div className={`sam-shell${open ? " open" : ""}`}>
+      <Sidebar counts={counts} projects={projects.map((p) => ({ id: p.id, name: p.name }))} open={open} />
+
+      <div className="home-section">
+        <div className="page-pad pb-0">
+          <div className="sam-toolbar d-flex align-items-center gap-3 flex-wrap">
+            <div className="sam-hero-main">
+              <span className="sam-hero-icon">
+                <i className={`bx ${icon}`} />
+              </span>
+              <div className="min-w-0">
+                <div className="sam-hero-title text-truncate">{title}</div>
+                {subtitle && <div className="sam-hero-sub text-truncate">{subtitle}</div>}
+              </div>
+            </div>
+
+            <div className="ms-auto d-flex align-items-center gap-2 flex-wrap">
+              <button
+                type="button"
+                className="btn btn-sm d-flex align-items-center gap-2"
+                onClick={() => setPaletteOpen(true)}
+                style={{
+                  background: "rgba(255,255,255,0.15)",
+                  border: "none",
+                  color: "#fff",
+                  fontSize: "0.8rem",
+                }}
+              >
+                <i className="bx bx-search" />
+                <span style={{ opacity: 0.8 }}>Buscar…</span>
+                <kbd
+                  style={{
+                    fontSize: "0.65rem",
+                    border: "1px solid rgba(255,255,255,0.35)",
+                    borderRadius: 4,
+                    padding: "0 5px",
+                    opacity: 0.8,
+                  }}
+                >
+                  ⌘K
+                </kbd>
+              </button>
+
+              <button
+                type="button"
+                className="btn btn-sm d-flex align-items-center gap-1"
+                onClick={() => router.push("/issues?new=1")}
+                style={{
+                  background: "#fff",
+                  border: "none",
+                  color: "var(--primary)",
+                  fontSize: "0.8rem",
+                  fontWeight: 600,
+                }}
+              >
+                <i className="bx bx-plus" />
+                Nuevo issue
+              </button>
+
+              {actions}
+            </div>
+          </div>
+        </div>
+
+        <div className="page-pad pt-3">{children}</div>
+      </div>
+
+      {/* Botón de sesión en la esquina, visible con el sidebar colapsado */}
+      <button
+        type="button"
+        onClick={logout}
+        title={`Cerrar sesión de ${user.name}`}
+        style={{
+          position: "fixed",
+          bottom: 16,
+          left: open ? "calc(var(--sidebar-expanded) - 46px)" : "16px",
+          zIndex: 1040,
+          width: 30,
+          height: 30,
+          borderRadius: "50%",
+          border: "none",
+          background: "#fff",
+          color: "var(--primary)",
+          boxShadow: "var(--card-shadow)",
+          display: "inline-flex",
+          alignItems: "center",
+          justifyContent: "center",
+          transition: "left var(--transition)",
+        }}
+        aria-label="Cerrar sesión"
+      >
+        <i className="bx bx-log-out" />
+      </button>
+
+      <CommandPalette open={paletteOpen} onClose={closePalette} issues={paletteIssues} />
+    </div>
+  );
+}
diff --git a/src/components/layout/CommandPalette.tsx b/src/components/layout/CommandPalette.tsx
new file mode 100644
index 0000000..b0fa81c
--- /dev/null
+++ b/src/components/layout/CommandPalette.tsx
@@ -0,0 +1,168 @@
+"use client";
+
+import { useRouter } from "next/navigation";
+import { useEffect, useMemo, useRef, useState } from "react";
+
+interface CommandPaletteProps {
+  open: boolean;
+  onClose: () => void;
+  /** Issues recientes para navegar directamente a su detalle. */
+  issues: Array<{ id: string; identifier: string; title: string }>;
+}
+
+interface PaletteItem {
+  id: string;
+  icon: string;
+  label: string;
+  hint?: string;
+  run: () => void;
+}
+
+/**
+ * Palette de comandos al estilo Linear.
+ *
+ * Se abre con Cmd/Ctrl + K (el atajo se registra en el layout raíz). Filtra
+ * por texto y navega con las flechas, ejecutando la acción con Enter.
+ */
+export function CommandPalette({ open, onClose, issues }: CommandPaletteProps) {
+  const router = useRouter();
+  const [query, setQuery] = useState("");
+  const [selected, setSelected] = useState(0);
+  const inputRef = useRef<HTMLInputElement>(null);
+  const listRef = useRef<HTMLUListElement>(null);
+
+  // Limpiar el estado al abrir/cerrar y enfocar el input.
+  useEffect(() => {
+    if (open) {
+      setQuery("");
+      setSelected(0);
+      // El input solo existe cuando `open` es true.
+      requestAnimationFrame(() => inputRef.current?.focus());
+    }
+  }, [open]);
+
+  const items = useMemo<PaletteItem[]>(() => {
+    const navigation: PaletteItem[] = [
+      { id: "nav-inbox", icon: "bx-inbox", label: "Ir a Bandeja", hint: "G", run: () => router.push("/inbox") },
+      { id: "nav-issues", icon: "bx-list-ul", label: "Ir a Issues", hint: "I", run: () => router.push("/issues") },
+      { id: "nav-board", icon: "bx-columns", label: "Ir a Tablero", hint: "B", run: () => router.push("/board") },
+      { id: "nav-cycles", icon: "bx-reset", label: "Ir a Ciclos", hint: "C", run: () => router.push("/cycles") },
+      { id: "nav-projects", icon: "bx-folder", label: "Ir a Proyectos", hint: "P", run: () => router.push("/projects") },
+      {
+        id: "new-issue",
+        icon: "bx-plus-circle",
+        label: "Crear nuevo issue",
+        hint: "N",
+        run: () => router.push("/issues?new=1"),
+      },
+    ];
+
+    const issueItems: PaletteItem[] = issues.map((issue) => ({
+      id: `issue-${issue.id}`,
+      icon: "bx-radio-circle",
+      label: issue.title,
+      hint: issue.identifier,
+      run: () => router.push(`/issues/${issue.id}`),
+    }));
+
+    const all = [...navigation, ...issueItems];
+    if (!query.trim()) return all;
+
+    const q = query.trim().toLowerCase();
+    return all.filter(
+      (item) => item.label.toLowerCase().includes(q) || item.hint?.toLowerCase().includes(q),
+    );
+  }, [issues, query, router]);
+
+  // Reiniciar la selección cuando cambia el resultado del filtro.
+  useEffect(() => {
+    setSelected(0);
+  }, [query]);
+
+  // Mantener el elemento seleccionado visible en el scroll.
+  useEffect(() => {
+    const node = listRef.current?.children[selected] as HTMLElement | undefined;
+    node?.scrollIntoView({ block: "nearest" });
+  }, [selected]);
+
+  function handleKeyDown(event: React.KeyboardEvent) {
+    if (event.key === "Escape") {
+      event.preventDefault();
+      onClose();
+      return;
+    }
+
+    if (event.key === "ArrowDown") {
+      event.preventDefault();
+      setSelected((current) => (current + 1) % Math.max(items.length, 1));
+      return;
+    }
+
+    if (event.key === "ArrowUp") {
+      event.preventDefault();
+      setSelected((current) => (current - 1 + items.length) % Math.max(items.length, 1));
+      return;
+    }
+
+    if (event.key === "Enter") {
+      event.preventDefault();
+      const item = items[selected];
+      if (item) {
+        onClose();
+        item.run();
+      }
+    }
+  }
+
+  if (!open) return null;
+
+  return (
+    <div
+      className="palette-backdrop"
+      onClick={(event) => {
+        // Cerrar al pulsar fuera del panel.
+        if (event.target === event.currentTarget) onClose();
+      }}
+    >
+      <div className="palette" role="dialog" aria-modal="true" aria-label="Paleta de comandos">
+        <input
+          ref={inputRef}
+          className="palette-input"
+          placeholder="Buscar un issue o escribir un comando…"
+          value={query}
+          onChange={(event) => setQuery(event.target.value)}
+          onKeyDown={handleKeyDown}
+        />
+
+        <ul className="palette-list" ref={listRef}>
+          {items.length === 0 && (
+            <li className="palette-item" style={{ cursor: "default", color: "var(--lp-text-faint)" }}>
+              <i className="bx bx-search" />
+              Sin resultados para «{query}»
+            </li>
+          )}
+
+          {items.map((item, index) => (
+            <li
+              key={item.id}
+              className={`palette-item${index === selected ? " selected" : ""}`}
+              onMouseEnter={() => setSelected(index)}
+              onClick={() => {
+                onClose();
+                item.run();
+              }}
+            >
+              <i className={`bx ${item.icon}`} />
+              <span className="text-truncate">{item.label}</span>
+              {item.hint && (
+                <span className="ms-auto" style={{ fontSize: 11.5, color: "var(--lp-text-faint)" }}>
+                  {item.hint}
+                </span>
+              )}
+            </li>
+          ))}
+        </ul>
+      </div>
+    </div>
+  );
+}
diff --git a/src/components/layout/Sidebar.tsx b/src/components/layout/Sidebar.tsx
new file mode 100644
index 0000000..e26925e
--- /dev/null
+++ b/src/components/layout/Sidebar.tsx
@@ -0,0 +1,101 @@
+"use client";
+
+import Link from "next/link";
+import { usePathname } from "next/navigation";
+
+interface SidebarProps {
+  /** Contadores de issues por sección, para mostrar junto a cada enlace. */
+  counts: {
+    inbox: number;
+    issues: number;
+    board: number;
+    cycles: number;
+    projects: number;
+  };
+  projects: Array<{ id: string; name: string }>;
+  /** Controla el estado abierto/colapsado del shell. */
+  open: boolean;
+}
+
+/**
+ * Navegación lateral, patrón SamShell de la plataforma: sidebar #00285D
+ * colapsable (78px <-> 250px) con iconos boxicons y tooltip al colapsar.
+ *
+ * El enlace activo se determina con `usePathname`, sin estado propio.
+ */
+export function Sidebar({ counts, projects, open }: SidebarProps) {
+  const pathname = usePathname();
+
+  const mainLinks = [
+    { href: "/inbox", icon: "bx-inbox", label: "Bandeja", count: counts.inbox },
+    { href: "/issues", icon: "bx-list-ul", label: "Issues", count: counts.issues },
+    { href: "/board", icon: "bx-columns", label: "Tablero", count: counts.board },
+    { href: "/cycles", icon: "bx-reset", label: "Ciclos", count: counts.cycles },
+    { href: "/projects", icon: "bx-folder", label: "Proyectos", count: counts.projects },
+  ];
+
+  const isActive = (href: string) =>
+    pathname === href || (href !== "/" && pathname.startsWith(`${href}/`));
+
+  return (
+    <aside className="sam-sidebar">
+      <div className="logo-details">
+        <span className="logo_name">
+          <i className="bx bx-briefcase" style={{ fontSize: "1.3rem" }} />
+          <span className="brand-text">Proyectos</span>
+        </span>
+        <i
+          className={`bx ${open ? "bx-menu-alt-right" : "bx-menu"}`}
+          id="btn"
+          role="button"
+          aria-label="Alternar menú"
+        />
+      </div>
+
+      <ul className="nav-list">
+        {mainLinks.map((link) => (
+          <li key={link.href}>
+            <Link href={link.href} className={isActive(link.href) ? "active" : ""}>
+              <i className={`bx ${link.icon}`} />
+              <span className="links_name">{link.label}</span>
+              {link.count > 0 && <span className="nav-badge">{link.count}</span>}
+            </Link>
+            <span className="tooltip">{link.label}</span>
+          </li>
+        ))}
+
+        {projects.length > 0 && (
+          <>
+            <li style={{ margin: "14px 12px 4px" }}>
+              <span
+                className="links_name"
+                style={{
+                  fontSize: "0.68rem",
+                  textTransform: "uppercase",
+                  letterSpacing: "0.05em",
+                  color: "rgba(219,228,243,0.55)",
+                  fontWeight: 600,
+                }}
+              >
+                Proyectos
+              </span>
+            </li>
+
+            {projects.map((project) => (
+              <li key={project.id}>
+                <Link
+                  href={`/projects/${project.id}`}
+                  className={isActive(`/projects/${project.id}`) ? "active" : ""}
+                >
+                  <i className="bx bx-folder" />
+                  <span className="links_name text-truncate">{project.name}</span>
+                </Link>
+                <span className="tooltip">{project.name}</span>
+              </li>
+            ))}
+          </>
+        )}
+      </ul>
+    </aside>
+  );
+}
diff --git a/src/components/ui/Avatar.tsx b/src/components/ui/Avatar.tsx
new file mode 100644
index 0000000..f163e89
--- /dev/null
+++ b/src/components/ui/Avatar.tsx
@@ -0,0 +1,31 @@
+import type { User } from "@/lib/types";
+
+interface AvatarProps {
+  user: User | null | undefined;
+  size?: "sm" | "lg";
+  title?: string;
+}
+
+/** Avatar circular con iniciales. Muestra un placeholder si no hay asignado. */
+export function Avatar({ user, size = "sm", title }: AvatarProps) {
+  const className = `avatar${size === "lg" ? " avatar-lg" : ""}`;
+
+  if (!user) {
+    return (
+      <span className={`${className} avatar-unassigned`} title={title ?? "Sin asignar"} aria-label="Sin asignar">
+        <i className="bx bx-user" />
+      </span>
+    );
+  }
+
+  return (
+    <span
+      className={className}
+      style={{ background: user.color }}
+      title={title ?? user.name}
+      aria-label={user.name}
+    >
+      {user.initials}
+    </span>
+  );
+}
diff --git a/src/components/ui/EmptyState.tsx b/src/components/ui/EmptyState.tsx
new file mode 100644
index 0000000..541d507
--- /dev/null
+++ b/src/components/ui/EmptyState.tsx
@@ -0,0 +1,20 @@
+interface EmptyStateProps {
+  icon?: string;
+  title: string;
+  description?: string;
+  action?: React.ReactNode;
+}
+
+/** Estado vacío centrado para listas sin resultados. */
+export function EmptyState({ icon = "bx-inbox", title, description, action }: EmptyStateProps) {
+  return (
+    <div className="empty-state">
+      <div className="empty-state-icon">
+        <i className={`bx ${icon}`} />
+      </div>
+      <div style={{ color: "var(--lp-text)", fontWeight: 600, marginBottom: 4 }}>{title}</div>
+      {description && <div style={{ fontSize: 13 }}>{description}</div>}
+      {action && <div className="mt-3">{action}</div>}
+    </div>
+  );
+}
diff --git a/src/components/ui/Icons.tsx b/src/components/ui/Icons.tsx
new file mode 100644
index 0000000..d8b510d
--- /dev/null
+++ b/src/components/ui/Icons.tsx
@@ -0,0 +1,61 @@
+import { PRIORITY_META, STATUS_META, TYPE_META } from "@/lib/meta";
+import type { IssuePriority, IssueStatus, IssueType } from "@/lib/types";
+
+/**
+ * Iconografía con boxicons, igual que sam-portal y SistemaCalidad.
+ * Cada icono se compone con `bx bx-<nombre>`.
+ */
+
+interface StatusIconProps {
+  status: IssueStatus;
+  size?: number;
+}
+
+/** Icono de estado del issue. */
+export function StatusIcon({ status, size = 16 }: StatusIconProps) {
+  const meta = STATUS_META[status];
+  return (
+    <i
+      className={`bx ${meta.icon}`}
+      style={{ color: meta.color, fontSize: size }}
+      title={meta.label}
+      aria-label={meta.label}
+    />
+  );
+}
+
+interface PriorityIconProps {
+  priority: IssuePriority;
+  size?: number;
+}
+
+/** Icono de prioridad. */
+export function PriorityIcon({ priority, size = 16 }: PriorityIconProps) {
+  const meta = PRIORITY_META[priority];
+  return (
+    <i
+      className={`bx ${meta.icon}`}
+      style={{ color: meta.color, fontSize: size }}
+      title={meta.label}
+      aria-label={meta.label}
+    />
+  );
+}
+
+interface TypeIconProps {
+  type: IssueType;
+  size?: number;
+}
+
+/** Icono de tipo de issue: bug, feature, tarea o chore. */
+export function TypeIcon({ type, size = 16 }: TypeIconProps) {
+  const meta = TYPE_META[type];
+  return (
+    <i
+      className={`bx ${meta.icon}`}
+      style={{ color: meta.color, fontSize: size }}
+      title={meta.label}
+      aria-label={meta.label}
+    />
+  );
+}
diff --git a/src/components/ui/LabelChip.tsx b/src/components/ui/LabelChip.tsx
new file mode 100644
index 0000000..c3f6807
--- /dev/null
+++ b/src/components/ui/LabelChip.tsx
@@ -0,0 +1,15 @@
+import type { Label } from "@/lib/types";
+
+interface LabelChipProps {
+  label: Label;
+}
+
+/** Etiqueta pequeña con punto de color, estilo Linear. */
+export function LabelChip({ label }: LabelChipProps) {
+  return (
+    <span className="label-chip">
+      <span className="label-dot" style={{ background: label.color }} />
+      {label.name}
+    </span>
+  );
+}
diff --git a/src/components/ui/ProgressBar.tsx b/src/components/ui/ProgressBar.tsx
new file mode 100644
index 0000000..83a2ec9
--- /dev/null
+++ b/src/components/ui/ProgressBar.tsx
@@ -0,0 +1,28 @@
+interface ProgressBarProps {
+  value: number;
+  /** Color de la barra. Por defecto el acento de la app. */
+  color?: string;
+  label?: string;
+}
+
+/** Barra de progreso fina reutilizable. */
+export function ProgressBar({ value, color, label }: ProgressBarProps) {
+  const clamped = Math.max(0, Math.min(100, value));
+
+  return (
+    <div>
+      {label && (
+        <div className="d-flex justify-content-between mb-1" style={{ fontSize: 12 }}>
+          <span style={{ color: "var(--lp-text-faint)" }}>{label}</span>
+          <span style={{ color: "var(--lp-text-muted)" }}>{clamped}%</span>
+        </div>
+      )}
+      <div className="progress-lp">
+        <div
+          className="progress-lp-bar"
+          style={{ width: `${clamped}%`, background: color }}
+        />
+      </div>
+    </div>
+  );
+}
diff --git a/src/hooks/useIssues.ts b/src/hooks/useIssues.ts
new file mode 100644
index 0000000..8db1890
--- /dev/null
+++ b/src/hooks/useIssues.ts
@@ -0,0 +1,40 @@
+"use client";
+
+import { useCallback, useEffect, useState } from "react";
+import { api } from "@/lib/api";
+import type { Issue, IssueFilters } from "@/lib/types";
+
+/**
+ * Carga issues con los filtros dados y expone un `refresh` para volver a
+ * consultar tras mutaciones locales (crear issue, cambiar estado, etc.).
+ *
+ * `refreshKey` permite forzar una recarga desde el exterior sin recrear el
+ * objeto de filtros.
+ */
+export function useIssues(filters?: IssueFilters, refreshKey = 0) {
+  const [issues, setIssues] = useState<Issue[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+
+  const filtersKey = JSON.stringify(filters ?? {});
+
+  const load = useCallback(async () => {
+    setLoading(true);
+    setError(null);
+
+    try {
+      const result = await api.listIssues(filters ? JSON.parse(filtersKey) : undefined);
+      setIssues(result);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : "Error cargando issues");
+    } finally {
+      setLoading(false);
+    }
+  }, [filtersKey, filters]);
+
+  useEffect(() => {
+    void load();
+  }, [load, refreshKey]);
+
+  return { issues, loading, error, refresh: load };
+}
diff --git a/src/lib/api/client.ts b/src/lib/api/client.ts
new file mode 100644
index 0000000..1374e7a
--- /dev/null
+++ b/src/lib/api/client.ts
@@ -0,0 +1,41 @@
+import type {
+  Comment,
+  Cycle,
+  ID,
+  Issue,
+  IssueFilters,
+  IssueInput,
+  Label,
+  Project,
+  User,
+} from "@/lib/types";
+
+/**
+ * Contrato del backend de SAM para el módulo de Proyectos.
+ *
+ * La app solo habla contra esta interfaz. La implementación concreta se
+ * elige en `src/lib/api/index.ts`: hoy hay una mock en memoria, y cuando
+ * SAM exponga los endpoints reales bastará con añadir `HttpProyectosApi`.
+ */
+export interface ProyectosApi {
+  // Sesión
+  /** Valida credenciales contra sige_sam_v3.usuario y devuelve el miembro. */
+  login(idUsuario: string, password: string): Promise<User>;
+
+  // Datos de referencia
+  listUsers(): Promise<User[]>;
+  listLabels(): Promise<Label[]>;
+  listProjects(): Promise<Project[]>;
+  listCycles(): Promise<Cycle[]>;
+
+  // Issues
+  listIssues(filters?: IssueFilters): Promise<Issue[]>;
+  getIssue(id: ID): Promise<Issue | null>;
+  createIssue(input: IssueInput): Promise<Issue>;
+  updateIssue(id: ID, patch: Partial<IssueInput>): Promise<Issue>;
+
+  // Comentarios
+  listComments(issueId: ID): Promise<Comment[]>;
+  /** `authorId` es el idUsuario del usuario en sesión. */
+  addComment(issueId: ID, body: string, authorId: ID): Promise<Comment>;
+}
diff --git a/src/lib/api/http.ts b/src/lib/api/http.ts
new file mode 100644
index 0000000..155b1f3
--- /dev/null
+++ b/src/lib/api/http.ts
@@ -0,0 +1,146 @@
+import type {
+  Comment,
+  Cycle,
+  ID,
+  Issue,
+  IssueFilters,
+  IssueInput,
+  Label,
+  Project,
+  User,
+} from "@/lib/types";
+import type { ProyectosApi } from "./client";
+
+/**
+ * Implementación HTTP del contrato `ProyectosApi`, contra `SAM.API`.
+ *
+ * Endpoints (módulo `ProyectosController`, schema `proyectos.*`):
+ *   GET   /api/proyectos/members
+ *   GET   /api/proyectos/labels
+ *   GET   /api/proyectos/projects
+ *   GET   /api/proyectos/cycles
+ *   GET   /api/proyectos/issues?status=&priority=&assigneeId=&...
+ *   GET   /api/proyectos/issues/{id}
+ *   POST  /api/proyectos/issues
+ *   PATCH /api/proyectos/issues/{id}
+ *   GET   /api/proyectos/issues/{id}/comments
+ *   POST  /api/proyectos/issues/{id}/comments
+ *
+ * Autenticación: NUNCA se manda la API key desde el navegador. Las peticiones
+ * van al proxy de mismo origen (`src/app/api/proyectos/[...path]/route.ts`),
+ * que añade `X-Api-Key` en el servidor usando `SAM_API_KEY` (sin prefijo
+ * NEXT_PUBLIC_, por eso no se empaqueta en el bundle JS).
+ */
+
+// Mismo origen: el proxy del servidor se encarga de hablar con SAM.API.
+const BASE_URL = "";
+
+/** Error de la API con el código HTTP y el mensaje devuelto por el backend. */
+export class ApiError extends Error {
+  constructor(
+    public readonly status: number,
+    message: string,
+  ) {
+    super(message);
+    this.name = "ApiError";
+  }
+}
+
+async function request<T>(path: string, init?: RequestInit): Promise<T> {
+  const response = await fetch(`${BASE_URL}${path}`, {
+    ...init,
+    headers: {
+      "Content-Type": "application/json",
+      ...init?.headers,
+    },
+    // La app cliente siempre quiere datos frescos.
+    cache: "no-store",
+  });
+
+  if (!response.ok) {
+    // El backend devuelve { message } en los errores.
+    const body = (await response.json().catch(() => null)) as { message?: string } | null;
+    throw new ApiError(response.status, body?.message ?? `Error ${response.status}`);
+  }
+
+  // 204 No Content: no hay cuerpo que parsear.
+  if (response.status === 204) return undefined as T;
+
+  return (await response.json()) as T;
+}
+
+/** Serializa un filtro de array repitiendo la clave: ?a=1&a=2 */
+function buildQuery(filters?: IssueFilters): string {
+  if (!filters) return "";
+
+  const params = new URLSearchParams();
+
+  const append = (key: string, values?: string[]) => {
+    for (const value of values ?? []) params.append(key, value);
+  };
+
+  append("status", filters.status);
+  append("assigneeId", filters.assigneeId);
+  append("projectId", filters.projectId);
+  append("cycleId", filters.cycleId);
+  append("labelIds", filters.labelIds);
+
+  // El backend numera la prioridad como int.
+  for (const value of filters.priority ?? []) params.append("priority", String(value));
+
+  // El backend llama `q` a la búsqueda de texto.
+  if (filters.query?.trim()) params.append("q", filters.query.trim());
+
+  const qs = params.toString();
+  return qs ? `?${qs}` : "";
+}
+
+export const httpApi: ProyectosApi = {
+  async login(idUsuario: string, password: string): Promise<User> {
+    return request<User>("/api/proyectos/auth/login", {
+      method: "POST",
+      body: JSON.stringify({ idUsuario, password }),
+    });
+  },
+
+  // El frontend llama a esto "users"; el backend lo expone como "members".
+  listUsers: () => request<User[]>("/api/proyectos/members"),
+
+  listLabels: () => request<Label[]>("/api/proyectos/labels"),
+
+  listProjects: () => request<Project[]>("/api/proyectos/projects"),
+
+  listCycles: () => request<Cycle[]>("/api/proyectos/cycles"),
+
+  listIssues: (filters) => request<Issue[]>(`/api/proyectos/issues${buildQuery(filters)}`),
+
+  async getIssue(id: ID): Promise<Issue | null> {
+    try {
+      return await request<Issue>(`/api/proyectos/issues/${id}`);
+    } catch (error) {
+      // 404 = no existe; el contrato lo trata como null, no como error.
+      if (error instanceof ApiError && error.status === 404) return null;
+      throw error;
+    }
+  },
+
+  createIssue: (input: IssueInput) =>
+    request<Issue>("/api/proyectos/issues", {
+      method: "POST",
+      body: JSON.stringify(input),
+    }),
+
+  updateIssue: (id: ID, patch: Partial<IssueInput>) =>
+    request<Issue>(`/api/proyectos/issues/${id}`, {
+      method: "PATCH",
+      body: JSON.stringify(patch),
+    }),
+
+  listComments: (issueId: ID) => request<Comment[]>(`/api/proyectos/issues/${issueId}/comments`),
+
+  addComment: (issueId: ID, body: string, authorId: ID) =>
+    request<Comment>(`/api/proyectos/issues/${issueId}/comments`, {
+      method: "POST",
+      body: JSON.stringify({ body, authorId }),
+    }),
+};
diff --git a/src/lib/api/index.ts b/src/lib/api/index.ts
new file mode 100644
index 0000000..79fe4eb
--- /dev/null
+++ b/src/lib/api/index.ts
@@ -0,0 +1,23 @@
+import type { ProyectosApi } from "./client";
+import { httpApi } from "./http";
+import { mockApi } from "./mock";
+
+/**
+ * Punto único de acceso al backend desde cualquier componente.
+ *
+ * Selección automática:
+ *  - Por defecto se usa la API real de SAM, vía el proxy de mismo origen
+ *    (`src/app/api/proyectos/[...path]/route.ts`), que añade la API key en
+ *    el servidor. El navegador nunca ve la clave.
+ *  - Con `NEXT_PUBLIC_USE_MOCK=true` se usa la implementación mock en
+ *    memoria, para desarrollar la UI sin backend levantado.
+ *
+ * La URL de SAM.API (`SAM_API_URL`) y su clave (`SAM_API_KEY`) se leen solo
+ * en el servidor: ninguna lleva prefijo NEXT_PUBLIC_, así que no se
+ * empaquetan en el JavaScript del cliente.
+ */
+export const api: ProyectosApi =
+  process.env.NEXT_PUBLIC_USE_MOCK === "true" ? mockApi : httpApi;
+
+export type { ProyectosApi } from "./client";
+export { ApiError } from "./http";
diff --git a/src/lib/api/mock.ts b/src/lib/api/mock.ts
new file mode 100644
index 0000000..6bb390e
--- /dev/null
+++ b/src/lib/api/mock.ts
@@ -0,0 +1,181 @@
+import type {
+  Comment,
+  Cycle,
+  ID,
+  Issue,
+  IssueFilters,
+  IssueInput,
+  Label,
+  Project,
+  User,
+} from "@/lib/types";
+import * as seed from "@/lib/seed";
+import type { ProyectosApi } from "./client";
+
+/**
+ * Implementación en memoria del contrato `ProyectosApi`.
+ *
+ * Sustituye a la API real mientras el backend de SAM no tenga el módulo de
+ * proyectos. Muta una copia local de los datos de `src/lib/seed.ts`, así que
+ * los cambios se mantienen durante la sesión pero no se persisten.
+ */
+
+const state = {
+  issues: structuredClone(seed.issues),
+  comments: structuredClone(seed.comments),
+  projects: structuredClone(seed.projects),
+  cycles: structuredClone(seed.cycles),
+  users: structuredClone(seed.users),
+  labels: structuredClone(seed.labels),
+  seq: seed.issues.length,
+};
+
+/** Simula latencia de red para que los estados de carga sean visibles. */
+const delay = (ms = 120) => new Promise((resolve) => setTimeout(resolve, ms));
+
+function nextId(prefix: string): ID {
+  state.seq += 1;
+  return `${prefix}${state.seq}`;
+}
+
+function buildIdentifier(project: Project | undefined, seq: number): string {
+  const key = project?.key ?? "GEN";
+  return `${key}-${seq}`;
+}
+
+function matchesFilters(issue: Issue, filters?: IssueFilters): boolean {
+  if (!filters) return true;
+
+  if (filters.status?.length && !filters.status.includes(issue.status)) return false;
+  if (filters.priority?.length && !filters.priority.includes(issue.priority)) return false;
+  if (filters.assigneeId?.length && !filters.assigneeId.includes(issue.assigneeId ?? ""))
+    return false;
+  if (filters.projectId?.length && !filters.projectId.includes(issue.projectId ?? "")) return false;
+  if (filters.cycleId?.length && !filters.cycleId.includes(issue.cycleId ?? "")) return false;
+  if (filters.labelIds?.length && !filters.labelIds.some((id) => issue.labelIds.includes(id)))
+    return false;
+
+  if (filters.query?.trim()) {
+    const q = filters.query.trim().toLowerCase();
+    const haystack = `${issue.identifier} ${issue.title} ${issue.description}`.toLowerCase();
+    if (!haystack.includes(q)) return false;
+  }
+
+  return true;
+}
+
+export const mockApi: ProyectosApi = {
+  /**
+   * Login simulado: acepta el idUsuario 14399848 con cualquier clave, y
+   * también los miembros del seed (u1..u4). Solo sirve para desarrollar
+   * la UI sin backend; la validación real ocurre en SAM.API.
+   */
+  async login(idUsuario: string, password: string): Promise<User> {
+    await delay(200);
+
+    const id = idUsuario.trim();
+    if (!id || !password) throw new Error("Faltan credenciales.");
+
+    if (id === "14399848") {
+      return {
+        id: "14399848",
+        name: "Juan Pérez",
+        email: "juan@ichn.local",
+        initials: "JP",
+        color: "#015fc9",
+      };
+    }
+
+    const found = state.users.find((user) => user.id === id);
+    if (!found) throw new Error("Credenciales inválidas.");
+    return found;
+  },
+
+  async listUsers(): Promise<User[]> {
+    await delay(40);
+    return state.users;
+  },
+
+  async listLabels(): Promise<Label[]> {
+    await delay(40);
+    return state.labels;
+  },
+
+  async listProjects(): Promise<Project[]> {
+    await delay(60);
+    return state.projects;
+  },
+
+  async listCycles(): Promise<Cycle[]> {
+    await delay(60);
+    return state.cycles;
+  },
+
+  async listIssues(filters?: IssueFilters): Promise<Issue[]> {
+    await delay(140);
+    return state.issues.filter((issue) => matchesFilters(issue, filters));
+  },
+
+  async getIssue(id: ID): Promise<Issue | null> {
+    await delay(80);
+    return state.issues.find((issue) => issue.id === id) ?? null;
+  },
+
+  async createIssue(input: IssueInput): Promise<Issue> {
+    await delay(120);
+    const project = state.projects.find((p) => p.id === input.projectId);
+    const now = new Date().toISOString();
+
+    const issue: Issue = {
+      id: nextId("i"),
+      identifier: buildIdentifier(project, state.seq + 1),
+      title: input.title,
+      description: input.description ?? "",
+      status: input.status ?? "todo",
+      priority: input.priority ?? 0,
+      type: input.type ?? "task",
+      assigneeId: input.assigneeId ?? null,
+      projectId: input.projectId ?? null,
+      cycleId: input.cycleId ?? null,
+      labelIds: input.labelIds ?? [],
+      createdAt: now,
+      updatedAt: now,
+      completedAt: null,
+    };
+
+    state.issues.unshift(issue);
+    return issue;
+  },
+
+  async updateIssue(id: ID, patch: Partial<IssueInput>): Promise<Issue> {
+    await delay(120);
+    const issue = state.issues.find((i) => i.id === id);
+    if (!issue) throw new Error(`Issue ${id} no encontrado`);
+
+    Object.assign(issue, patch, { updatedAt: new Date().toISOString() });
+
+    // Mantener `completedAt` coherente con el estado final.
+    const isFinished = issue.status === "done" || issue.status === "canceled";
+    issue.completedAt = isFinished ? (issue.completedAt ?? new Date().toISOString()) : null;
+
+    return issue;
+  },
+
+  async listComments(issueId: ID): Promise<Comment[]> {
+    await delay(60);
+    return state.comments.filter((c) => c.issueId === issueId);
+  },
+
+  async addComment(issueId: ID, body: string, authorId: ID): Promise<Comment> {
+    await delay(100);
+    const comment: Comment = {
+      issueId,
+      id: nextId("cm"),
+      authorId,
+      body,
+      createdAt: new Date().toISOString(),
+    };
+    state.comments.push(comment);
+    return comment;
+  },
+};
diff --git a/src/lib/auth.tsx b/src/lib/auth.tsx
new file mode 100644
index 0000000..4493992
--- /dev/null
+++ b/src/lib/auth.tsx
@@ -0,0 +1,81 @@
+"use client";
+
+import { createContext, useCallback, useContext, useEffect, useMemo, useState } from "react";
+import { api } from "@/lib/api";
+import type { User } from "@/lib/types";
+
+/**
+ * Sesión del módulo.
+ *
+ * El login valida contra sige_sam_v3.usuario en el backend
+ * (POST /api/proyectos/auth/login). El miembro resultante se guarda en
+ * localStorage y se expone por contexto, para que toda la app sepa quién
+ * está conectado sin volver a preguntar.
+ */
+
+const STORAGE_KEY = "proyectos.session";
+
+interface Session {
+  user: User;
+}
+
+interface AuthContextValue {
+  user: User | null;
+  /** true mientras se restaura la sesión guardada. */
+  loading: boolean;
+  login: (idUsuario: string, password: string) => Promise<void>;
+  logout: () => void;
+}
+
+const AuthContext = createContext<AuthContextValue>({
+  user: null,
+  loading: true,
+  login: async () => {},
+  logout: () => {},
+});
+
+export function AuthProvider({ children }: { children: React.ReactNode }) {
+  const [user, setUser] = useState<User | null>(null);
+  const [loading, setLoading] = useState(true);
+
+  // Restaurar sesión al montar (solo en el navegador).
+  useEffect(() => {
+    try {
+      const raw = localStorage.getItem(STORAGE_KEY);
+      if (raw) {
+        const session = JSON.parse(raw) as Session;
+        if (session?.user?.id) setUser(session.user);
+      }
+    } catch {
+      // Sesión corrupta: se ignora y queda como desconectado.
+      localStorage.removeItem(STORAGE_KEY);
+    } finally {
+      setLoading(false);
+    }
+  }, []);
+
+  const login = useCallback(async (idUsuario: string, password: string) => {
+    const member = await api.login(idUsuario.trim(), password);
+    const session: Session = { user: member };
+
+    localStorage.setItem(STORAGE_KEY, JSON.stringify(session));
+    setUser(member);
+  }, []);
+
+  const logout = useCallback(() => {
+    localStorage.removeItem(STORAGE_KEY);
+    setUser(null);
+    window.location.href = "/login";
+  }, []);
+
+  const value = useMemo<AuthContextValue>(
+    () => ({ user, loading, login, logout }),
+    [user, loading, login, logout],
+  );
+
+  return <AuthContext.Provider value={value}>{children}</AuthContext.Provider>;
+}
+
+export function useAuth(): AuthContextValue {
+  return useContext(AuthContext);
+}
diff --git a/src/lib/format.ts b/src/lib/format.ts
new file mode 100644
index 0000000..19c490e
--- /dev/null
+++ b/src/lib/format.ts
@@ -0,0 +1,70 @@
+/** Helpers de formato compartidos por toda la app. */
+
+const MESES = [
+  "ene",
+  "feb",
+  "mar",
+  "abr",
+  "may",
+  "jun",
+  "jul",
+  "ago",
+  "sep",
+  "oct",
+  "nov",
+  "dic",
+];
+
+/** Formatea una fecha ISO como "12 oct" o "12 oct 2025" si no es el año en curso. */
+export function formatShortDate(iso: string | null | undefined): string {
+  if (!iso) return "";
+  const date = new Date(iso);
+  if (Number.isNaN(date.getTime())) return "";
+
+  const day = date.getDate();
+  const month = MESES[date.getMonth()];
+  const year = date.getFullYear();
+  const currentYear = new Date().getFullYear();
+
+  return year === currentYear ? `${day} ${month}` : `${day} ${month} ${year}`;
+}
+
+/** Formatea una fecha como "12 de octubre de 2026". */
+export function formatLongDate(iso: string | null | undefined): string {
+  if (!iso) return "";
+  const date = new Date(iso);
+  if (Number.isNaN(date.getTime())) return "";
+
+  return date.toLocaleDateString("es-CL", {
+    day: "numeric",
+    month: "long",
+    year: "numeric",
+  });
+}
+
+/** Tiempo relativo en español: "hace 3 días", "hace 2 horas". */
+export function formatRelative(iso: string | null | undefined): string {
+  if (!iso) return "";
+  const date = new Date(iso);
+  if (Number.isNaN(date.getTime())) return "";
+
+  const diffMs = Date.now() - date.getTime();
+  const minutes = Math.round(diffMs / 60000);
+
+  if (minutes < 1) return "ahora";
+  if (minutes < 60) return `hace ${minutes} min`;
+
+  const hours = Math.round(minutes / 60);
+  if (hours < 24) return `hace ${hours} h`;
+
+  const days = Math.round(hours / 24);
+  if (days < 30) return `hace ${days} días`;
+
+  return formatShortDate(iso);
+}
+
+/** Porcentaje de progreso redondeado, evitando división por cero. */
+export function percent(part: number, total: number): number {
+  if (total === 0) return 0;
+  return Math.round((part / total) * 100);
+}
diff --git a/src/lib/meta.ts b/src/lib/meta.ts
new file mode 100644
index 0000000..ae8c4ff
--- /dev/null
+++ b/src/lib/meta.ts
@@ -0,0 +1,53 @@
+import type { IssueStatus, IssuePriority, IssueType } from "@/lib/types";
+
+/** Definiciones canónicas para pintar badges y iconos de forma consistente. */
+
+export const STATUS_META: Record<
+  IssueStatus,
+  { label: string; color: string; icon: string; group: string }
+> = {
+  backlog: { label: "Backlog", color: "#6c788b", icon: "bx-radio-circle", group: "Sin iniciar" },
+  todo: { label: "Por hacer", color: "#6c788b", icon: "bx-radio-circle", group: "Sin iniciar" },
+  in_progress: { label: "En curso", color: "#d19b3d", icon: "bx-error-circle", group: "En curso" },
+  in_review: { label: "En revisión", color: "#8c6fd1", icon: "bx-time", group: "En curso" },
+  done: { label: "Completado", color: "#015fc9", icon: "bx-check-circle", group: "Completado" },
+  canceled: { label: "Cancelado", color: "#98a2b3", icon: "bx-x-circle", group: "Completado" },
+};
+
+export const STATUS_ORDER: IssueStatus[] = [
+  "backlog",
+  "todo",
+  "in_progress",
+  "in_review",
+  "done",
+  "canceled",
+];
+
+export const PRIORITY_META: Record<
+  IssuePriority,
+  { label: string; color: string; icon: string; rank: number }
+> = {
+  0: { label: "Sin prioridad", color: "#6c788b", icon: "bx-dots-horizontal-rounded", rank: 0 },
+  4: { label: "Urgente", color: "#d93025", icon: "bx-error", rank: 1 },
+  3: { label: "Alta", color: "#e8710a", icon: "bx-up-arrow-alt", rank: 2 },
+  2: { label: "Media", color: "#d19b3d", icon: "bx-equal", rank: 3 },
+  1: { label: "Baja", color: "#015fc9", icon: "bx-down-arrow-alt", rank: 4 },
+};
+
+export const TYPE_META: Record<IssueType, { label: string; icon: string; color: string }> = {
+  task: { label: "Tarea", icon: "bx-task", color: "#6c788b" },
+  bug: { label: "Bug", icon: "bx-bug", color: "#d93025" },
+  feature: { label: "Feature", icon: "bx-star", color: "#015fc9" },
+  chore: { label: "Chore", icon: "bx-cog", color: "#6c788b" },
+};
+
+export const PROJECT_STATUS_META: Record<
+  string,
+  { label: string; color: string; icon: string }
+> = {
+  planned: { label: "Planificado", color: "#6c788b", icon: "bx-radio-circle" },
+  in_progress: { label: "En curso", color: "#d19b3d", icon: "bx-error-circle" },
+  paused: { label: "Pausado", color: "#e8710a", icon: "bx-pause-circle" },
+  completed: { label: "Completado", color: "#015fc9", icon: "bx-check-circle" },
+  canceled: { label: "Cancelado", color: "#98a2b3", icon: "bx-x-circle" },
+};
diff --git a/src/lib/seed.ts b/src/lib/seed.ts
new file mode 100644
index 0000000..11930e8
--- /dev/null
+++ b/src/lib/seed.ts
@@ -0,0 +1,240 @@
+import type { Comment, Cycle, Issue, Label, Project, User } from "@/lib/types";
+
+/**
+ * Datos de ejemplo usados por la capa mock.
+ *
+ * Mientras el backend de SAM no exponga los endpoints de proyectos, la app
+ * consume estos datos en memoria. La forma de cada objeto replica el contrato
+ * definido en src/lib/types.ts, de modo que sustituir mock por HTTP no obliga
+ * a tocar ningún componente.
+ */
+
+export const users: User[] = [
+  { id: "u1", name: "Juan Pérez", email: "juan@ichn.local", initials: "JP", color: "#5e6ad2" },
+  { id: "u2", name: "María Rojas", email: "maria@ichn.local", initials: "MR", color: "#f2994a" },
+  { id: "u3", name: "Diego Soto", email: "diego@ichn.local", initials: "DS", color: "#26b5ce" },
+  { id: "u4", name: "Carla Muñoz", email: "carla@ichn.local", initials: "CM", color: "#bb87fc" },
+];
+
+export const labels: Label[] = [
+  { id: "l1", name: "frontend", color: "#5e6ad2" },
+  { id: "l2", name: "backend", color: "#26b5ce" },
+  { id: "l3", name: "diseño", color: "#bb87fc" },
+  { id: "l4", name: "bug", color: "#fb2c36" },
+  { id: "l5", name: "deuda técnica", color: "#f2994a" },
+];
+
+export const projects: Project[] = [
+  {
+    id: "p1",
+    name: "Plataforma",
+    key: "PLAT",
+    description: "Núcleo de la plataforma: autenticación, usuarios y permisos.",
+    status: "in_progress",
+    leadId: "u1",
+    startDate: "2026-09-01",
+    targetDate: "2026-12-15",
+    createdAt: "2026-08-20T10:00:00Z",
+  },
+  {
+    id: "p2",
+    name: "Portal Alumnos",
+    key: "PORT",
+    description: "Portal web para alumnos: matrícula, pagos y notas.",
+    status: "planned",
+    leadId: "u2",
+    startDate: "2026-10-15",
+    targetDate: "2027-02-01",
+    createdAt: "2026-09-02T10:00:00Z",
+  },
+  {
+    id: "p3",
+    name: "Helpdesk",
+    key: "HELP",
+    description: "Sistema de tickets y soporte interno.",
+    status: "completed",
+    leadId: "u3",
+    startDate: "2026-05-01",
+    targetDate: "2026-09-30",
+    createdAt: "2026-04-10T10:00:00Z",
+  },
+];
+
+export const cycles: Cycle[] = [
+  {
+    id: "c3",
+    name: "Ciclo 3",
+    number: 3,
+    projectId: null,
+    startsAt: "2026-10-05",
+    endsAt: "2026-10-26",
+    status: "active",
+  },
+  {
+    id: "c4",
+    name: "Ciclo 4",
+    number: 4,
+    projectId: null,
+    startsAt: "2026-10-27",
+    endsAt: "2026-11-16",
+    status: "upcoming",
+  },
+  {
+    id: "c2",
+    name: "Ciclo 2",
+    number: 2,
+    projectId: null,
+    startsAt: "2026-09-14",
+    endsAt: "2026-10-04",
+    status: "completed",
+  },
+];
+
+export const issues: Issue[] = [
+  {
+    id: "i1",
+    identifier: "PLAT-42",
+    title: "Implementar login con JWT y refresh token",
+    description:
+      "El backend expone `POST /api/auth/login`. Falta integrar el guardado del token y el refresco automático antes de expirar.",
+    status: "in_progress",
+    priority: 3,
+    type: "feature",
+    assigneeId: "u1",
+    projectId: "p1",
+    cycleId: "c3",
+    labelIds: ["l2"],
+    createdAt: "2026-10-01T09:15:00Z",
+    updatedAt: "2026-10-12T15:40:00Z",
+    completedAt: null,
+  },
+  {
+    id: "i2",
+    identifier: "PLAT-43",
+    title: "Bug: el sidebar se cierra al navegar en móvil",
+    description: "Al pulsar un enlace del sidebar en pantallas pequeñas el menú no se colapsa.",
+    status: "todo",
+    priority: 4,
+    type: "bug",
+    assigneeId: "u2",
+    projectId: "p1",
+    cycleId: "c3",
+    labelIds: ["l1", "l4"],
+    createdAt: "2026-10-03T11:00:00Z",
+    updatedAt: "2026-10-10T08:20:00Z",
+    completedAt: null,
+  },
+  {
+    id: "i3",
+    identifier: "PLAT-44",
+    title: "Diseñar sistema de permisos por rol",
+    description: "Definir roles sam, portal e it y cómo se mapean a los módulos.",
+    status: "in_review",
+    priority: 2,
+    type: "task",
+    assigneeId: "u4",
+    projectId: "p1",
+    cycleId: "c3",
+    labelIds: ["l3"],
+    createdAt: "2026-09-28T14:30:00Z",
+    updatedAt: "2026-10-11T17:05:00Z",
+    completedAt: null,
+  },
+  {
+    id: "i4",
+    identifier: "PLAT-45",
+    title: "Añadir rate limiting al endpoint de login",
+    description: "El backend ya lo expone con `[EnableRateLimiting(\"login\")]`. Verificar el comportamiento desde el cliente.",
+    status: "done",
+    priority: 2,
+    type: "task",
+    assigneeId: "u3",
+    projectId: "p1",
+    cycleId: "c3",
+    labelIds: ["l2"],
+    createdAt: "2026-09-20T10:00:00Z",
+    updatedAt: "2026-10-08T12:00:00Z",
+    completedAt: "2026-10-08T12:00:00Z",
+  },
+  {
+    id: "i5",
+    identifier: "PORT-7",
+    title: "Pantalla de matrícula en línea",
+    description: "Formulario multi-paso con validación RUT y selección de cursos.",
+    status: "backlog",
+    priority: 1,
+    type: "feature",
+    assigneeId: null,
+    projectId: "p2",
+    cycleId: null,
+    labelIds: ["l1", "l3"],
+    createdAt: "2026-10-06T09:00:00Z",
+    updatedAt: "2026-10-06T09:00:00Z",
+    completedAt: null,
+  },
+  {
+    id: "i6",
+    identifier: "PORT-8",
+    title: "Integrar WebPay para pagos de arancel",
+    description: "Flujo de pago con redirección y confirmación por webhook.",
+    status: "todo",
+    priority: 4,
+    type: "feature",
+    assigneeId: "u1",
+    projectId: "p2",
+    cycleId: "c4",
+    labelIds: ["l2"],
+    createdAt: "2026-10-07T16:45:00Z",
+    updatedAt: "2026-10-09T10:10:00Z",
+    completedAt: null,
+  },
+  {
+    id: "i7",
+    identifier: "HELP-12",
+    title: "Exportar tickets a CSV",
+    description: "El módulo de helpdesk ya está entregado; queda deuda técnica en la exportación.",
+    status: "canceled",
+    priority: 0,
+    type: "chore",
+    assigneeId: "u3",
+    projectId: "p3",
+    cycleId: "c2",
+    labelIds: ["l5"],
+    createdAt: "2026-08-15T13:20:00Z",
+    updatedAt: "2026-09-30T09:00:00Z",
+    completedAt: null,
+  },
+  {
+    id: "i8",
+    identifier: "PLAT-46",
+    title: "Refactorizar el cliente HTTP compartido",
+    description: "Unificar fetch con reintentos y manejo de errores 401.",
+    status: "todo",
+    priority: 1,
+    type: "chore",
+    assigneeId: "u2",
+    projectId: "p1",
+    cycleId: "c4",
+    labelIds: ["l5"],
+    createdAt: "2026-10-09T08:00:00Z",
+    updatedAt: "2026-10-09T08:00:00Z",
+    completedAt: null,
+  },
+];
+
+export const comments: Comment[] = [
+  {
+    id: "cm1",
+    issueId: "i1",
+    authorId: "u2",
+    body: "¿Vamos a usar httpOnly cookies o guardamos el token en localStorage?",
+    createdAt: "2026-10-11T10:30:00Z",
+  },
+  {
+    id: "cm2",
+    issueId: "i1",
+    authorId: "u1",
+    body: "Preferiría httpOnly + refresh cookie, pero eso lo decide el backend de SAM.",
+    createdAt: "2026-10-11T11:05:00Z",
+  },
+];
diff --git a/src/lib/store.tsx b/src/lib/store.tsx
new file mode 100644
index 0000000..474715f
--- /dev/null
+++ b/src/lib/store.tsx
@@ -0,0 +1,87 @@
+"use client";
+
+import { createContext, useContext, useEffect, useMemo, useState } from "react";
+import { api } from "@/lib/api";
+import type { Cycle, Label, Project, User } from "@/lib/types";
+
+/**
+ * Datos de referencia compartidos por toda la app (usuarios, etiquetas,
+ * proyectos y ciclos).
+ *
+ * Se cargan una sola vez en el layout raíz y se exponen por contexto, para
+ * que cada página pueda resolver nombres, colores e iniciales sin repetir
+ * llamadas a la API.
+ */
+
+interface ReferenceData {
+  users: User[];
+  labels: Label[];
+  projects: Project[];
+  cycles: Cycle[];
+  loading: boolean;
+}
+
+const ReferenceContext = createContext<ReferenceData>({
+  users: [],
+  labels: [],
+  projects: [],
+  cycles: [],
+  loading: true,
+});
+
+export function ReferenceProvider({ children }: { children: React.ReactNode }) {
+  const [data, setData] = useState<Omit<ReferenceData, "loading">>({
+    users: [],
+    labels: [],
+    projects: [],
+    cycles: [],
+  });
+  const [loading, setLoading] = useState(true);
+
+  useEffect(() => {
+    let cancelled = false;
+
+    async function load() {
+      const [users, labels, projects, cycles] = await Promise.all([
+        api.listUsers(),
+        api.listLabels(),
+        api.listProjects(),
+        api.listCycles(),
+      ]);
+
+      if (!cancelled) {
+        setData({ users, labels, projects, cycles });
+        setLoading(false);
+      }
+    }
+
+    void load();
+    return () => {
+      cancelled = true;
+    };
+  }, []);
+
+  const value = useMemo<ReferenceData>(() => ({ ...data, loading }), [data, loading]);
+
+  return <ReferenceContext.Provider value={value}>{children}</ReferenceContext.Provider>;
+}
+
+/** Accede a los datos de referencia ya cargados. */
+export function useReference(): ReferenceData {
+  return useContext(ReferenceContext);
+}
+
+/** Helpers de búsqueda por id, memorizados junto a los datos. */
+export function useReferenceLookups() {
+  const { users, labels, projects, cycles } = useReference();
+
+  return useMemo(
+    () => ({
+      userById: new Map(users.map((u) => [u.id, u])),
+      labelById: new Map(labels.map((l) => [l.id, l])),
+      projectById: new Map(projects.map((p) => [p.id, p])),
+      cycleById: new Map(cycles.map((c) => [c.id, c])),
+    }),
+    [users, labels, projects, cycles],
+  );
+}
diff --git a/src/lib/types.ts b/src/lib/types.ts
new file mode 100644
index 0000000..f008b59
--- /dev/null
+++ b/src/lib/types.ts
@@ -0,0 +1,108 @@
+/**
+ * Modelo de dominio de "Proyectos" (estilo Linear).
+ *
+ * Estos tipos son el contrato entre el frontend y el backend de SAM.
+ * Cuando la API real exponga estos recursos, basta con implementar el
+ * cliente HTTP con esta misma forma (ver src/lib/api/index.ts).
+ */
+
+export type ID = string;
+
+export type IssueStatus =
+  | "backlog"
+  | "todo"
+  | "in_progress"
+  | "in_review"
+  | "done"
+  | "canceled";
+
+export type IssuePriority = 0 | 1 | 2 | 3 | 4; // 0 = sin prioridad .. 4 = urgente
+
+export type IssueType = "task" | "bug" | "feature" | "chore";
+
+export interface User {
+  id: ID;
+  name: string;
+  email: string;
+  initials: string;
+  color: string;
+}
+
+export interface Label {
+  id: ID;
+  name: string;
+  color: string;
+}
+
+export interface Project {
+  id: ID;
+  name: string;
+  /** Identificador corto usado como prefijo de los issues, ej. "PLAT". */
+  key: string;
+  description: string;
+  status: "planned" | "in_progress" | "paused" | "completed" | "canceled";
+  leadId: ID | null;
+  startDate: string | null;
+  targetDate: string | null;
+  createdAt: string;
+}
+
+export interface Cycle {
+  id: ID;
+  name: string;
+  number: number;
+  projectId: ID | null;
+  startsAt: string;
+  endsAt: string;
+  status: "upcoming" | "active" | "completed";
+}
+
+export interface Comment {
+  id: ID;
+  issueId: ID;
+  authorId: ID;
+  body: string;
+  createdAt: string;
+}
+
+export interface Issue {
+  id: ID;
+  /** Identificador visible, ej. "PLAT-42". */
+  identifier: string;
+  title: string;
+  description: string;
+  status: IssueStatus;
+  priority: IssuePriority;
+  type: IssueType;
+  assigneeId: ID | null;
+  projectId: ID | null;
+  cycleId: ID | null;
+  labelIds: ID[];
+  createdAt: string;
+  updatedAt: string;
+  completedAt: string | null;
+}
+
+/** Filtros soportados por `listIssues`. */
+export interface IssueFilters {
+  status?: IssueStatus[];
+  priority?: IssuePriority[];
+  assigneeId?: ID[];
+  projectId?: ID[];
+  cycleId?: ID[];
+  labelIds?: ID[];
+  query?: string;
+}
+
+/** Payload para crear/actualizar un issue. */
+export interface IssueInput {
+  title: string;
+  description?: string;
+  status?: IssueStatus;
+  priority?: IssuePriority;
+  type?: IssueType;
+  assigneeId?: ID | null;
+  projectId?: ID | null;
+  cycleId?: ID | null;
+  labelIds?: ID[];
+}
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..7bbb10f
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,41 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "lib": [
+      "dom",
+      "dom.iterable",
+      "esnext"
+    ],
+    "allowJs": true,
+    "skipLibCheck": true,
+    "strict": true,
+    "noEmit": true,
+    "esModuleInterop": true,
+    "module": "esnext",
+    "moduleResolution": "bundler",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "jsx": "react-jsx",
+    "incremental": true,
+    "plugins": [
+      {
+        "name": "next"
+      }
+    ],
+    "paths": {
+      "@/*": [
+        "./src/*"
+      ]
+    }
+  },
+  "include": [
+    "next-env.d.ts",
+    "**/*.ts",
+    "**/*.tsx",
+    ".next/types/**/*.ts",
+    ".next/dev/types/**/*.ts"
+  ],
+  "exclude": [
+    "node_modules"
+  ]
+}