feat: gateway CRUD routes — conversations, projects, missions, tasks (P1-005/006) (#72)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

apps/gateway/src/tasks/tasks.controller.ts

@@ -0,0 +1,79 @@
+import {
+  Body,
+  Controller,
+  Delete,
+  Get,
+  HttpCode,
+  HttpStatus,
+  Inject,
+  NotFoundException,
+  Param,
+  Patch,
+  Post,
+  Query,
+  UseGuards,
+} from '@nestjs/common';
+import type { Brain } from '@mosaic/brain';
+import { BRAIN } from '../brain/brain.module.js';
+import { AuthGuard } from '../auth/auth.guard.js';
+import type { CreateTaskDto, UpdateTaskDto } from './tasks.dto.js';
+
+@Controller('api/tasks')
+@UseGuards(AuthGuard)
+export class TasksController {
+  constructor(@Inject(BRAIN) private readonly brain: Brain) {}
+
+  @Get()
+  async list(
+    @Query('projectId') projectId?: string,
+    @Query('missionId') missionId?: string,
+    @Query('status') status?: string,
+  ) {
+    if (projectId) return this.brain.tasks.findByProject(projectId);
+    if (missionId) return this.brain.tasks.findByMission(missionId);
+    if (status)
+      return this.brain.tasks.findByStatus(
+        status as Parameters<typeof this.brain.tasks.findByStatus>[0],
+      );
+    return this.brain.tasks.findAll();
+  }
+
+  @Get(':id')
+  async findOne(@Param('id') id: string) {
+    const task = await this.brain.tasks.findById(id);
+    if (!task) throw new NotFoundException('Task not found');
+    return task;
+  }
+
+  @Post()
+  async create(@Body() dto: CreateTaskDto) {
+    return this.brain.tasks.create({
+      title: dto.title,
+      description: dto.description,
+      status: dto.status,
+      priority: dto.priority,
+      projectId: dto.projectId,
+      missionId: dto.missionId,
+      assignee: dto.assignee,
+      tags: dto.tags,
+      dueDate: dto.dueDate ? new Date(dto.dueDate) : undefined,
+    });
+  }
+
+  @Patch(':id')
+  async update(@Param('id') id: string, @Body() dto: UpdateTaskDto) {
+    const task = await this.brain.tasks.update(id, {
+      ...dto,
+      dueDate: dto.dueDate ? new Date(dto.dueDate) : dto.dueDate === null ? null : undefined,
+    });
+    if (!task) throw new NotFoundException('Task not found');
+    return task;
+  }
+
+  @Delete(':id')
+  @HttpCode(HttpStatus.NO_CONTENT)
+  async remove(@Param('id') id: string) {
+    const deleted = await this.brain.tasks.remove(id);
+    if (!deleted) throw new NotFoundException('Task not found');
+  }
+}