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/projects/projects.controller.ts

@@ -0,0 +1,61 @@
+import {
+  Body,
+  Controller,
+  Delete,
+  Get,
+  HttpCode,
+  HttpStatus,
+  Inject,
+  NotFoundException,
+  Param,
+  Patch,
+  Post,
+  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 { CurrentUser } from '../auth/current-user.decorator.js';
+import type { CreateProjectDto, UpdateProjectDto } from './projects.dto.js';
+
+@Controller('api/projects')
+@UseGuards(AuthGuard)
+export class ProjectsController {
+  constructor(@Inject(BRAIN) private readonly brain: Brain) {}
+
+  @Get()
+  async list() {
+    return this.brain.projects.findAll();
+  }
+
+  @Get(':id')
+  async findOne(@Param('id') id: string) {
+    const project = await this.brain.projects.findById(id);
+    if (!project) throw new NotFoundException('Project not found');
+    return project;
+  }
+
+  @Post()
+  async create(@CurrentUser() user: { id: string }, @Body() dto: CreateProjectDto) {
+    return this.brain.projects.create({
+      name: dto.name,
+      description: dto.description,
+      status: dto.status,
+      ownerId: user.id,
+    });
+  }
+
+  @Patch(':id')
+  async update(@Param('id') id: string, @Body() dto: UpdateProjectDto) {
+    const project = await this.brain.projects.update(id, dto);
+    if (!project) throw new NotFoundException('Project not found');
+    return project;
+  }
+
+  @Delete(':id')
+  @HttpCode(HttpStatus.NO_CONTENT)
+  async remove(@Param('id') id: string) {
+    const deleted = await this.brain.projects.remove(id);
+    if (!deleted) throw new NotFoundException('Project not found');
+  }
+}