feat(registratura): 3.02 bidirectional integration, simplified status, threads

- Dynamic document types: string-based DocumentType synced with Tag Manager
  (new types auto-create tags under 'document-type' category)
- Added default types: 'Apel telefonic', 'Videoconferinta'
- Bidirectional Address Book: quick-create contacts from sender/recipient/
  assignee fields via QuickContactDialog popup
- Simplified status: Switch toggle replaces dropdown (default open)
- Responsabil (Assignee) field with contact autocomplete (ERP-ready)
- Entry threads: threadParentId links entries as replies, ThreadView shows
  parent/current/children tree with branching support
- Info tooltips on deadline, status, and assignee fields
- New Resp. column and thread icon in registry table
- All changes backward-compatible with existing data

src/modules/registratura/index.ts

@@ -1,7 +1,14 @@
-export { registraturaConfig } from './config';
-export { RegistraturaModule } from './components/registratura-module';
+export { registraturaConfig } from "./config";
+export { RegistraturaModule } from "./components/registratura-module";
 export type {
-  RegistryEntry, RegistryDirection, RegistryStatus, DocumentType,
-  DeadlineDayType, DeadlineResolution, DeadlineCategory,
-  DeadlineTypeDef, TrackedDeadline,
-} from './types';
+  RegistryEntry,
+  RegistryDirection,
+  RegistryStatus,
+  DocumentType,
+  DeadlineDayType,
+  DeadlineResolution,
+  DeadlineCategory,
+  DeadlineTypeDef,
+  TrackedDeadline,
+} from "./types";
+export { DEFAULT_DOCUMENT_TYPES, DEFAULT_DOC_TYPE_LABELS } from "./types";