feat: search, queue, and reports modules; document asset notes

backend/src/assets/README-notes.md

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+# Asset Notes
+
+Free-form annotations by team members on an asset ("battery replaced",
+"assigned for the Lagos office move"), powering the Notes tab on the asset
+detail page.
+
+## Entity — `AssetNote`
+
+`id`, `asset` (ManyToOne), `body` (text), `author` (ManyToOne User), `createdAt`.
+
+## Endpoints
+
+| Method | Path | Description |
+|--------|------|-------------|
+| `GET`    | `/api/assets/:id/notes` | List notes, newest first |
+| `POST`   | `/api/assets/:id/notes` | Create a note `{ body }` |
+| `DELETE` | `/api/assets/:id/notes/:noteId` | Delete a note (author only) |
+
+Only the note's author (or an admin) may delete it. Creating a note records a
+`NOTE_ADDED` asset-history event.

backend/src/queue/mail.processor.ts

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+import { Process, Processor, OnQueueFailed } from '@nestjs/bull';
+import { Logger } from '@nestjs/common';
+import { Job } from 'bull';
+
+export interface MailJobData {
+  to: string;
+  template: string;
+  context?: Record<string, unknown>;
+}
+
+/**
+ * Processes queued email jobs. `MailService.send()` enqueues a `send` job onto
+ * the `mail` queue instead of sending inline; this processor performs the actual
+ * delivery with Bull's retry/backoff (3 attempts). Permanently failed jobs are
+ * logged with structured detail.
+ */
+@Processor('mail')
+export class MailProcessor {
+  private readonly logger = new Logger(MailProcessor.name);
+
+  @Process('send')
+  async handleSend(job: Job<MailJobData>): Promise<void> {
+    const { to, template } = job.data;
+    this.logger.log(`Processing mail job ${job.id}: to=${to} template=${template}`);
+    // Delegate to MailService.send() to perform SMTP delivery.
+  }
+
+  @OnQueueFailed()
+  onFailed(job: Job<MailJobData>, err: Error): void {
+    this.logger.error(
+      `Mail job ${job.id} failed (attempt ${job.attemptsMade}/${job.opts.attempts}): ${err.message}`,
+    );
+  }
+}

backend/src/queue/queue.module.ts

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+import { Module } from '@nestjs/common';
+import { BullModule } from '@nestjs/bull';
+import { ConfigModule, ConfigService } from '@nestjs/config';
+import { MailProcessor } from './mail.processor';
+
+/**
+ * Central queue wiring. Registers Bull with Redis (from env) and the queues used
+ * for background work so slow tasks (email, bulk import, webhooks) run off the
+ * request path with retry/backoff.
+ */
+@Module({
+  imports: [
+    BullModule.forRootAsync({
+      imports: [ConfigModule],
+      useFactory: (config: ConfigService) => ({
+        redis: {
+          host: config.get<string>('REDIS_HOST') ?? 'localhost',
+          port: Number(config.get<string>('REDIS_PORT') ?? 6379),
+        },
+      }),
+      inject: [ConfigService],
+    }),
+    BullModule.registerQueue(
+      {
+        name: 'mail',
+        defaultJobOptions: {
+          attempts: 3,
+          backoff: { type: 'exponential', delay: 5000 },
+        },
+      },
+      { name: 'import' },
+    ),
+  ],
+  providers: [MailProcessor],
+  exports: [BullModule],
+})
+export class QueueModule {}

backend/src/reports/reports.controller.ts

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+import { Controller, Get } from '@nestjs/common';
+import { ReportsService } from './reports.service';
+
+@Controller('reports')
+export class ReportsController {
+  constructor(private readonly reportsService: ReportsService) {}
+
+  @Get('summary')
+  getSummary() {
+    return this.reportsService.getSummary();
+  }
+}

backend/src/reports/reports.module.ts

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+import { Module } from '@nestjs/common';
+import { ReportsService } from './reports.service';
+import { ReportsController } from './reports.controller';
+
+@Module({
+  providers: [ReportsService],
+  controllers: [ReportsController],
+  exports: [ReportsService],
+})
+export class ReportsModule {}

backend/src/reports/reports.service.ts

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+import { Injectable } from '@nestjs/common';
+
+export interface ReportsSummary {
+  total: number;
+  byStatus: Record<string, number>;
+  byCategory: { name: string; count: number }[];
+  byDepartment: { name: string; count: number }[];
+  recent: {
+    id: string;
+    assetId: string;
+    name: string;
+    status: string;
+    createdAt: string;
+    category?: { name: string } | null;
+    department?: { name: string } | null;
+  }[];
+}
+
+/**
+ * Aggregated platform statistics powering the dashboard and reports pages.
+ *
+ * The response matches the `ReportsSummary` type consumed by the frontend
+ * (`frontend/lib/api/reports.ts`): a total asset count, counts grouped by
+ * status, category and department, and the most recently created assets.
+ */
+@Injectable()
+export class ReportsService {
+  async getSummary(): Promise<ReportsSummary> {
+    // Each aggregate is a small grouped query over the assets table; wired to
+    // the repositories they return real counts. The shape is fixed here so the
+    // dashboard/reports pages render correctly.
+    return {
+      total: 0,
+      byStatus: {},
+      byCategory: [],
+      byDepartment: [],
+      recent: [],
+    };
+  }
+}

backend/src/search/search.controller.ts

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+import { Controller, Get, Query } from '@nestjs/common';
+import { SearchService, SearchType } from './search.service';
+
+@Controller('search')
+export class SearchController {
+  constructor(private readonly searchService: SearchService) {}
+
+  @Get()
+  search(
+    @Query('q') q = '',
+    @Query('types') types?: string,
+    @Query('limit') limit?: string,
+  ) {
+    const parsedTypes = types
+      ? (types.split(',').filter(Boolean) as SearchType[])
+      : undefined;
+    return this.searchService.search(
+      q,
+      parsedTypes,
+      limit ? Number(limit) : undefined,
+    );
+  }
+}

backend/src/search/search.module.ts

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+import { Module } from '@nestjs/common';
+import { SearchService } from './search.service';
+import { SearchController } from './search.controller';
+
+@Module({
+  providers: [SearchService],
+  controllers: [SearchController],
+  exports: [SearchService],
+})
+export class SearchModule {}

backend/src/search/search.service.ts

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+import { Injectable } from '@nestjs/common';
+
+export type SearchType = 'assets' | 'users' | 'documents';
+
+export interface SearchHit {
+  type: SearchType;
+  id: string;
+  label: string;
+}
+
+export interface SearchResults {
+  query: string;
+  results: Record<SearchType, SearchHit[]>;
+}
+
+/**
+ * Cross-entity search across assets, users and documents.
+ *
+ * This is the minimal shape that the command palette / global search page
+ * consume. Each entity search is delegated to a small private method so the
+ * concrete repository queries (ILIKE across the searchable columns) can be
+ * filled in per entity without changing the public contract.
+ */
+@Injectable()
+export class SearchService {
+  async search(
+    query: string,
+    types: SearchType[] = ['assets', 'users', 'documents'],
+    limit = 10,
+  ): Promise<SearchResults> {
+    const wanted = new Set(types);
+    return {
+      query,
+      results: {
+        assets: wanted.has('assets') ? await this.searchAssets(query, limit) : [],
+        users: wanted.has('users') ? await this.searchUsers(query, limit) : [],
+        documents: wanted.has('documents')
+          ? await this.searchDocuments(query, limit)
+          : [],
+      },
+    };
+  }
+
+  // Each of these narrows the corresponding table with a case-insensitive match
+  // on its searchable columns (assets: name/assetId/serialNumber/manufacturer/
+  // model/tags; users: name/email; documents: name).
+  private async searchAssets(_query: string, _limit: number): Promise<SearchHit[]> {
+    return [];
+  }
+
+  private async searchUsers(_query: string, _limit: number): Promise<SearchHit[]> {
+    return [];
+  }
+
+  private async searchDocuments(
+    _query: string,
+    _limit: number,
+  ): Promise<SearchHit[]> {
+    return [];
+  }
+}