feat(#82): implement Personality Module

- Add Personality model to Prisma schema with FormalityLevel enum
- Create migration and seed with 6 default personalities
- Implement CRUD API with TDD approach (97.67% coverage)
  * PersonalitiesService: findAll, findOne, findDefault, create, update, remove
  * PersonalitiesController: REST endpoints with auth guards
  * Comprehensive test coverage (21 passing tests)
- Add Personality types to shared package
- Create frontend components:
  * PersonalitySelector: dropdown for choosing personality
  * PersonalityPreview: preview personality style and system prompt
  * PersonalityForm: create/edit personalities with validation
  * Settings page: manage personalities with CRUD operations
- Integrate with Ollama API:
  * Support personalityId in chat endpoint
  * Auto-inject system prompt from personality
  * Fall back to default personality if not specified
- API client for frontend personality management

All tests passing with 97.67% backend coverage (exceeds 85% requirement)

apps/api/src/knowledge/knowledge.service.ts

@@ -12,13 +12,17 @@ import type {
   PaginatedEntries,
 } from "./entities/knowledge-entry.entity";
 import { renderMarkdown } from "./utils/markdown";
+import { LinkSyncService } from "./services/link-sync.service";
 
 /**
  * Service for managing knowledge entries
  */
 @Injectable()
 export class KnowledgeService {
-  constructor(private readonly prisma: PrismaService) {}
+  constructor(
+    private readonly prisma: PrismaService,
+    private readonly linkSync: LinkSyncService
+  ) {}
 
 
   /**
@@ -225,6 +229,9 @@ export class KnowledgeService {
       throw new Error("Failed to create entry");
     }
 
+    // Sync wiki links after entry creation
+    await this.linkSync.syncLinks(workspaceId, result.id, createDto.content);
+
     return {
       id: result.id,
       workspaceId: result.workspaceId,
@@ -374,6 +381,11 @@ export class KnowledgeService {
       throw new Error("Failed to update entry");
     }
 
+    // Sync wiki links after entry update (only if content changed)
+    if (updateDto.content !== undefined) {
+      await this.linkSync.syncLinks(workspaceId, result.id, result.content);
+    }
+
     return {
       id: result.id,
       workspaceId: result.workspaceId,