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/db.ts

@@ -0,0 +1,26 @@
+import Dexie from 'dexie'
+
+export interface SettingEntry {
+  key: string
+  value: string
+}
+
+export interface ProjectDocRecord {
+  projectId: number
+  projectName: string
+  updatedAt: string
+  sessionCount: number
+  markdown: string
+}
+
+const db = new Dexie('alpha-core') as Dexie & {
+  settings: Dexie.Table<SettingEntry, string>
+  project_docs: Dexie.Table<ProjectDocRecord, number>
+}
+
+db.version(2).stores({
+  settings: '&key',
+  project_docs: '&projectId, projectName, updatedAt',
+})
+
+export default db