K-10 pipeline transcripciones + settings IA + cache-aside + session doc

Nuevos modulos:
- services/ai.ts: cliente IA provider-agnostico (OpenRouter, MiniMax)
- services/db.ts: Dexie core con tabla settings + project_docs
- services/storage.ts: Cache-Aside + Write-Through (L1 Map → L2 Dexie → L3 localStorage)
- services/parse-transcription.ts: parser .docx/.vtt/.txt/.md
- services/session-analyzer.ts: extraccion IA de sesiones (resumen, tareas, decisiones)
- services/project-doc.ts: documento maestro MD (Bloque 1 resumen + Bloque 2 sesiones)
- stores/settings.ts: proveedores IA, modelos, API keys separadas por provider
- stores/transcriptions.ts: pipeline upload → analyze → create HU en KAPPA
- views/SettingsView.vue: configuracion IA (OpenRouter, MiniMax, OpenCode bridge)
- views/TranscriptionsView.vue: subida multiple + analisis sesion + visor MD + calendario
- components/AiProjectChat.vue: chat contextual por proyecto con selector de modelo

Cambios en existentes:
- stores/auth.ts, kappa-api.ts, upload-hu.ts: migrados a storage service (Dexie + localStorage)
- stores/projects.ts, workitems.ts: kappa_last_project via storage
- DashboardView.vue: descripcion reemplazada por AiProjectChat
- NewDashboardView.vue: tabs transcriptions + settings + navigate-settings events
- NavMain.vue: items Transcripciones + Configuracion
- SiteHeader.vue: labels tabs + language via storage
- LoginView.vue: remember_email via storage
- i18n: +80 keys español/ingles
- vite.config.ts: proxy CORS para MiniMax
- package.json: +mammoth.js

src/services/kappa-api.ts

@@ -1,3 +1,4 @@
+import { storage } from '@/services/storage'
 import type {
   KappaLoginPayload,
   KappaLoginResponse,
@@ -23,7 +24,7 @@ class KappaAPI {
   private token: string | null = null
 
   constructor() {
-    this.token = localStorage.getItem('kappa_token')
+    this.token = storage.get('kappa_token')
   }
 
   private get headers(): Record<string, string> {
@@ -66,14 +67,14 @@ class KappaAPI {
     )
     this.token = data.access || data.token || data.key || null
     if (this.token) {
-      localStorage.setItem('kappa_token', this.token)
+      storage.set('kappa_token', this.token)
     }
     return data
   }
 
   logout() {
     this.token = null
-    localStorage.removeItem('kappa_token')
+    storage.remove('kappa_token')
   }
 
   get isAuthenticated(): boolean {