feat(profiles): add profile repository

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/lib/server/profiles/repository.ts

@@ -0,0 +1,37 @@
+import type Database from 'better-sqlite3';
+import type { Profile } from '$lib/types';
+
+export function listProfiles(db: Database.Database): Profile[] {
+  return db
+    .prepare('SELECT id, name, avatar_emoji FROM profile ORDER BY name')
+    .all() as Profile[];
+}
+
+export function createProfile(
+  db: Database.Database,
+  name: string,
+  avatarEmoji: string | null = null
+): Profile {
+  const trimmed = name.trim();
+  if (!trimmed) throw new Error('Profile name cannot be empty');
+  return db
+    .prepare(
+      `INSERT INTO profile(name, avatar_emoji) VALUES (?, ?)
+       RETURNING id, name, avatar_emoji`
+    )
+    .get(trimmed, avatarEmoji) as Profile;
+}
+
+export function renameProfile(
+  db: Database.Database,
+  id: number,
+  newName: string
+): void {
+  const trimmed = newName.trim();
+  if (!trimmed) throw new Error('Profile name cannot be empty');
+  db.prepare('UPDATE profile SET name = ? WHERE id = ?').run(trimmed, id);
+}
+
+export function deleteProfile(db: Database.Database, id: number): void {
+  db.prepare('DELETE FROM profile WHERE id = ?').run(id);
+}