feat: MVP-3 Sprint 1 - Usage tracking, smart dashboard, scoring boost

## Registro de Uso
- Nuevo modelo NoteUsage en Prisma
- Tipos de eventos: view, search_click, related_click, link_click, copy_command, copy_snippet
- Funciones: trackNoteUsage, getUsageStats, getRecentlyUsedNotes
- localStorage: recentlyViewed (últimas 10 notas)
- Rastreo de copias en markdown-content.tsx

## Dashboard Rediseñado
- 5 bloques: Recientes, Más usadas, Comandos recientes, Snippets recientes, Según actividad
- Nuevo src/lib/dashboard.ts con getDashboardData()
- Recomendaciones basadas en recentlyViewed

## Scoring con Uso Real
- search.ts: +1 per 5 views (max +3), +2 recency boost
- related.ts: mismo sistema de usage boost
- No eclipsa match textual fuerte

## Tests
- 110 tests pasando (usage, dashboard, related, search)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/dashboard.tsx

@@ -5,13 +5,25 @@ import { Note } from '@/types/note'
 import { NoteList } from './note-list'
 import { Button } from '@/components/ui/button'
 import { SearchBar } from './search-bar'
-import { ArrowRight } from 'lucide-react'
+import { ArrowRight, TrendingUp, Terminal, Code, Zap } from 'lucide-react'
 
-export function Dashboard({ recentNotes, favoriteNotes, pinnedNotes }: {
+interface DashboardProps {
   recentNotes: Note[]
-  favoriteNotes: Note[]
-  pinnedNotes: Note[]
-}) {
+  mostUsedNotes: Note[]
+  recentCommands: Note[]
+  recentSnippets: Note[]
+  activityBasedNotes: Note[]
+  hasActivity: boolean
+}
+
+export function Dashboard({
+  recentNotes,
+  mostUsedNotes,
+  recentCommands,
+  recentSnippets,
+  activityBasedNotes,
+  hasActivity,
+}: DashboardProps) {
   return (
     <>
       <div className="flex justify-end mb-3">
@@ -19,27 +31,12 @@ export function Dashboard({ recentNotes, favoriteNotes, pinnedNotes }: {
       </div>
       <div className="space-y-8">
 
-      {pinnedNotes.length > 0 && (
-        <section>
-          <h2 className="text-xl font-semibold mb-3 flex items-center gap-2">
-            📌 Pineadas
-          </h2>
-          <NoteList notes={pinnedNotes} />
-        </section>
-      )}
-
-      {favoriteNotes.length > 0 && (
-        <section>
-          <h2 className="text-xl font-semibold mb-3 flex items-center gap-2">
-            ❤️ Favoritas
-          </h2>
-          <NoteList notes={favoriteNotes} />
-        </section>
-      )}
-
+      {/* Recientes */}
       <section>
         <div className="flex items-center justify-between mb-3">
-          <h2 className="text-xl font-semibold">Recientes</h2>
+          <h2 className="text-xl font-semibold flex items-center gap-2">
+            <span>Recientes</span>
+          </h2>
           <Link href="/notes">
             <Button variant="ghost" size="sm" className="gap-1">
               Ver todas <ArrowRight className="h-4 w-4" />
@@ -49,15 +46,89 @@ export function Dashboard({ recentNotes, favoriteNotes, pinnedNotes }: {
         {recentNotes.length > 0 ? (
           <NoteList notes={recentNotes} />
         ) : (
-          <div className="text-center py-8 text-gray-500">
-            <p>No hay notas todavía.</p>
-            <Link href="/new">
-              <Button className="mt-4">Crea tu primera nota</Button>
-            </Link>
-          </div>
+          <EmptyState />
         )}
       </section>
+
+      {/* Más usadas */}
+      {mostUsedNotes.length > 0 && (
+        <section>
+          <div className="flex items-center justify-between mb-3">
+            <h2 className="text-xl font-semibold flex items-center gap-2">
+              <TrendingUp className="h-5 w-5 text-orange-500" />
+              <span>Más usadas</span>
+            </h2>
+            <Link href="/notes">
+              <Button variant="ghost" size="sm" className="gap-1">
+                Ver todas <ArrowRight className="h-4 w-4" />
+              </Button>
+            </Link>
+          </div>
+          <NoteList notes={mostUsedNotes} />
+        </section>
+      )}
+
+      {/* Comandos recientes */}
+      {recentCommands.length > 0 && (
+        <section>
+          <div className="flex items-center justify-between mb-3">
+            <h2 className="text-xl font-semibold flex items-center gap-2">
+              <Terminal className="h-5 w-5 text-green-500" />
+              <span>Comandos recientes</span>
+            </h2>
+            <Link href="/notes?type=command">
+              <Button variant="ghost" size="sm" className="gap-1">
+                Ver todas <ArrowRight className="h-4 w-4" />
+              </Button>
+            </Link>
+          </div>
+          <NoteList notes={recentCommands} />
+        </section>
+      )}
+
+      {/* Snippets recientes */}
+      {recentSnippets.length > 0 && (
+        <section>
+          <div className="flex items-center justify-between mb-3">
+            <h2 className="text-xl font-semibold flex items-center gap-2">
+              <Code className="h-5 w-5 text-blue-500" />
+              <span>Snippets recientes</span>
+            </h2>
+            <Link href="/notes?type=snippet">
+              <Button variant="ghost" size="sm" className="gap-1">
+                Ver todas <ArrowRight className="h-4 w-4" />
+              </Button>
+            </Link>
+          </div>
+          <NoteList notes={recentSnippets} />
+        </section>
+      )}
+
+      {/* Según tu actividad */}
+      {hasActivity && activityBasedNotes.length > 0 && (
+        <section>
+          <div className="flex items-center justify-between mb-3">
+            <h2 className="text-xl font-semibold flex items-center gap-2">
+              <Zap className="h-5 w-5 text-purple-500" />
+              <span>Según tu actividad</span>
+            </h2>
+          </div>
+          <NoteList notes={activityBasedNotes} />
+        </section>
+      )}
+
     </div>
     </>
   )
-}
+}
+
+function EmptyState() {
+  return (
+    <div className="text-center py-8 text-gray-500">
+      <p>No hay notas todavía.</p>
+      <Link href="/new">
+        <Button className="mt-4">Crea tu primera nota</Button>
+      </Link>
+    </div>
+  )
+}