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/tasks/dto/query-tasks.dto.spec.ts

@@ -0,0 +1,168 @@
+import { describe, expect, it } from "vitest";
+import { validate } from "class-validator";
+import { plainToClass } from "class-transformer";
+import { QueryTasksDto } from "./query-tasks.dto";
+import { TaskStatus, TaskPriority } from "@prisma/client";
+import { SortOrder } from "../../common/dto";
+
+describe("QueryTasksDto", () => {
+  const validWorkspaceId = "123e4567-e89b-12d3-a456-426614174000";
+
+  it("should accept valid workspaceId", async () => {
+    const dto = plainToClass(QueryTasksDto, {
+      workspaceId: validWorkspaceId,
+    });
+
+    const errors = await validate(dto);
+    expect(errors.length).toBe(0);
+  });
+
+  it("should reject invalid workspaceId", async () => {
+    const dto = plainToClass(QueryTasksDto, {
+      workspaceId: "not-a-uuid",
+    });
+
+    const errors = await validate(dto);
+    expect(errors.length).toBeGreaterThan(0);
+    expect(errors.some(e => e.property === "workspaceId")).toBe(true);
+  });
+
+  it("should accept valid status filter", async () => {
+    const dto = plainToClass(QueryTasksDto, {
+      workspaceId: validWorkspaceId,
+      status: TaskStatus.IN_PROGRESS,
+    });
+
+    const errors = await validate(dto);
+    expect(errors.length).toBe(0);
+    expect(Array.isArray(dto.status)).toBe(true);
+    expect(dto.status).toEqual([TaskStatus.IN_PROGRESS]);
+  });
+
+  it("should accept multiple status filters", async () => {
+    const dto = plainToClass(QueryTasksDto, {
+      workspaceId: validWorkspaceId,
+      status: [TaskStatus.IN_PROGRESS, TaskStatus.NOT_STARTED],
+    });
+
+    const errors = await validate(dto);
+    expect(errors.length).toBe(0);
+    expect(Array.isArray(dto.status)).toBe(true);
+    expect(dto.status).toHaveLength(2);
+  });
+
+  it("should accept valid priority filter", async () => {
+    const dto = plainToClass(QueryTasksDto, {
+      workspaceId: validWorkspaceId,
+      priority: TaskPriority.HIGH,
+    });
+
+    const errors = await validate(dto);
+    expect(errors.length).toBe(0);
+    expect(Array.isArray(dto.priority)).toBe(true);
+    expect(dto.priority).toEqual([TaskPriority.HIGH]);
+  });
+
+  it("should accept multiple priority filters", async () => {
+    const dto = plainToClass(QueryTasksDto, {
+      workspaceId: validWorkspaceId,
+      priority: [TaskPriority.HIGH, TaskPriority.LOW],
+    });
+
+    const errors = await validate(dto);
+    expect(errors.length).toBe(0);
+    expect(Array.isArray(dto.priority)).toBe(true);
+    expect(dto.priority).toHaveLength(2);
+  });
+
+  it("should accept search parameter", async () => {
+    const dto = plainToClass(QueryTasksDto, {
+      workspaceId: validWorkspaceId,
+      search: "test task",
+    });
+
+    const errors = await validate(dto);
+    expect(errors.length).toBe(0);
+    expect(dto.search).toBe("test task");
+  });
+
+  it("should accept sortBy parameter", async () => {
+    const dto = plainToClass(QueryTasksDto, {
+      workspaceId: validWorkspaceId,
+      sortBy: "priority,dueDate",
+    });
+
+    const errors = await validate(dto);
+    expect(errors.length).toBe(0);
+    expect(dto.sortBy).toBe("priority,dueDate");
+  });
+
+  it("should accept sortOrder parameter", async () => {
+    const dto = plainToClass(QueryTasksDto, {
+      workspaceId: validWorkspaceId,
+      sortOrder: SortOrder.ASC,
+    });
+
+    const errors = await validate(dto);
+    expect(errors.length).toBe(0);
+    expect(dto.sortOrder).toBe(SortOrder.ASC);
+  });
+
+  it("should accept domainId filter", async () => {
+    const domainId = "123e4567-e89b-12d3-a456-426614174001";
+    const dto = plainToClass(QueryTasksDto, {
+      workspaceId: validWorkspaceId,
+      domainId,
+    });
+
+    const errors = await validate(dto);
+    expect(errors.length).toBe(0);
+    expect(Array.isArray(dto.domainId)).toBe(true);
+    expect(dto.domainId).toEqual([domainId]);
+  });
+
+  it("should accept multiple domainId filters", async () => {
+    const domainIds = [
+      "123e4567-e89b-12d3-a456-426614174001",
+      "123e4567-e89b-12d3-a456-426614174002",
+    ];
+    const dto = plainToClass(QueryTasksDto, {
+      workspaceId: validWorkspaceId,
+      domainId: domainIds,
+    });
+
+    const errors = await validate(dto);
+    expect(errors.length).toBe(0);
+    expect(Array.isArray(dto.domainId)).toBe(true);
+    expect(dto.domainId).toHaveLength(2);
+  });
+
+  it("should accept date range filters", async () => {
+    const dto = plainToClass(QueryTasksDto, {
+      workspaceId: validWorkspaceId,
+      dueDateFrom: "2024-01-01T00:00:00Z",
+      dueDateTo: "2024-12-31T23:59:59Z",
+    });
+
+    const errors = await validate(dto);
+    expect(errors.length).toBe(0);
+  });
+
+  it("should accept all filters combined", async () => {
+    const dto = plainToClass(QueryTasksDto, {
+      workspaceId: validWorkspaceId,
+      status: [TaskStatus.IN_PROGRESS, TaskStatus.NOT_STARTED],
+      priority: [TaskPriority.HIGH, TaskPriority.MEDIUM],
+      search: "urgent task",
+      sortBy: "priority,dueDate",
+      sortOrder: SortOrder.ASC,
+      page: 2,
+      limit: 25,
+      dueDateFrom: "2024-01-01T00:00:00Z",
+      dueDateTo: "2024-12-31T23:59:59Z",
+    });
+
+    const errors = await validate(dto);
+    expect(errors.length).toBe(0);
+  });
+});