feat: model selection+visibility, better filenames, picdrop direct upload + configurable gallery

- studio: quality/model selector (friendly names from active models); library shows model used
- seed 2 models (Schnell/Beste Qualitaet); GET /api/models for studio+library
- filename: YYYY-MM-DD_motif_format.png (was redundant slug, no date)
- picdrop: direct upload to final name (fix .tmp- leftover from failed rename on picdrop); cleanupTmp helper
- configurable default gallery (migration 003, settings + admin field); base_path=SFTP root, gallery=subfolder

src/lib/seed.ts

@@ -5,6 +5,16 @@ import { hashPassword } from './auth';
 export async function seed(): Promise<void> {
   // Einstellungen (eine Zeile)
   await query(`INSERT INTO settings (id) VALUES (1) ON CONFLICT (id) DO NOTHING`);
+  // Standard-Galerie vorbelegen (wie initial gebrieft), falls leer
+  await query(`UPDATE settings SET picdrop_default_gallery='POSTER LEA' WHERE id=1 AND picdrop_default_gallery IS NULL`);
+
+  // Modelle vorbelegen (freundliche Namen, keine rohen IDs in der UI)
+  const mCount = await one<{ n: string }>(`SELECT count(*)::text AS n FROM models`);
+  if (mCount && Number(mCount.n) === 0) {
+    await query(`INSERT INTO models (model_id, label, description, active, is_default, supports_alpha, sort) VALUES
+      ('google/gemini-3.1-flash-image','Schnell','In wenigen Sekunden fertig. Für den Alltag.',true,true,true,0),
+      ('google/gemini-3-pro-image','Beste Qualität','Dauert länger, trifft Schrift und Details genauer.',true,false,true,1)`);
+  }
 
   // Nutzer
   const till = await one(`SELECT id FROM users WHERE username='till'`);