email: full-text search (FTS5) — backend index + /email/search + search box in the list

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/servers/api/email/email.ts

@@ -3,7 +3,7 @@ import { join } from 'node:path';
 import type { EmailMessage } from 'types';
 import { createRouter } from '../../create-router';
 import { DATA_PATH } from '@@/data-path';
-import { openEmailDb, rowToSummary, getSyncMeta } from './email-db';
+import { openEmailDb, rowToSummary, getSyncMeta, searchEmails } from './email-db';
 import { accountsRouter } from './accounts';
 
 export const emailRouter = createRouter();
@@ -64,6 +64,24 @@ emailRouter.get('/events', (ctx) => {
   });
 });
 
+// Full-text search across all mail (subject / sender / recipients / snippet / body), newest first.
+emailRouter.get('/search', async (ctx) => {
+  const email = ctx.get('user').email;
+  const q = (ctx.req.query('q') ?? '').trim();
+  const page = Math.max(1, Number(ctx.req.query('page') ?? '1') || 1);
+  const limit = Math.min(100, Math.max(1, Number(ctx.req.query('limit') ?? '50') || 50));
+  const offset = (page - 1) * limit;
+  if (!q) return ctx.json({ messages: [], total: 0 });
+
+  const db = openEmailDb(email);
+  try {
+    const { rows, total } = searchEmails(db, q, limit, offset);
+    return ctx.json({ messages: rows.map(rowToSummary), total });
+  } finally {
+    db.close();
+  }
+});
+
 emailRouter.get('/messages', async (ctx) => {
   const email = ctx.get('user').email;
   const page = Number(ctx.req.query('page') ?? '1');