feat: complete v0.3 reading and discovery experience

tests/sync.test.ts

@@ -14,12 +14,17 @@ after(() => { database?.close(); rmSync(databasePath, { force: true }); rmSync(`
 test("applies tracked migrations and deduplicates active pull jobs", async () => {
   const { db } = await import("../lib/db"); database = db;
   const { queuePull } = await import("../lib/sync");
+  const { notify } = await import("../lib/notifications");
   const migrations = db.prepare("SELECT version FROM schema_migrations ORDER BY version").all() as { version: number }[];
-  assert.deepEqual(migrations.map((item) => item.version), [1, 2, 3, 4, 5, 6, 7]);
+  assert.deepEqual(migrations.map((item) => item.version), [1, 2, 3, 4, 5, 6, 7, 8]);
   const userId = Number(db.prepare("INSERT INTO users(username,password_hash) VALUES('sync-test','hash')").run().lastInsertRowid);
   const sourceId = Number(db.prepare("INSERT INTO sources(user_id,name,base_url,token_encrypted,is_enabled) VALUES(?,?,?,?,1)").run(userId, "Test", "https://example.test", "encrypted").lastInsertRowid);
   assert.equal(queuePull(sourceId, "manual"), true);
   assert.equal(queuePull(sourceId, "webhook", { event: "memo.updated" }), false);
   const jobs = db.prepare("SELECT kind,trigger,status FROM sync_jobs WHERE source_id=?").all(sourceId) as { kind: string; trigger: string; status: string }[];
   assert.deepEqual(jobs, [{ kind: "pull", trigger: "manual", status: "queued" }]);
+  const actorId = Number(db.prepare("INSERT INTO users(username,password_hash) VALUES('actor-test','hash')").run().lastInsertRowid);
+  const postId = Number(db.prepare("INSERT INTO posts(author_id,content) VALUES(?,?)").run(userId, "Notification test").lastInsertRowid);
+  notify(userId, actorId, postId, "comment", "commented"); notify(userId, userId, postId, "reaction", "ignored");
+  assert.deepEqual(db.prepare("SELECT type,message FROM notifications WHERE user_id=?").all(userId), [{ type: "comment", message: "commented" }]);
 });