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/pages/api/admin/settings.ts

@@ -15,6 +15,7 @@ export const GET: APIRoute = async () => {
     openrouter_key_masked: orMask, openrouter_key_set: !!s.openrouter_key_enc,
     picdrop_host: s.picdrop_host, picdrop_protocol: s.picdrop_protocol, picdrop_port: s.picdrop_port,
     picdrop_user: s.picdrop_user, picdrop_base_path: s.picdrop_base_path,
+    picdrop_default_gallery: s.picdrop_default_gallery,
     picdrop_password_set: !!s.picdrop_password_enc,
     default_dpi: s.default_dpi, default_crop_mode: s.default_crop_mode, concurrency: s.concurrency,
     cricut_sheet_cm: s.cricut_sheet_cm, monthly_budget: s.monthly_budget, n8n_webhook_url: s.n8n_webhook_url,
@@ -29,7 +30,7 @@ export const PATCH: APIRoute = async ({ request }) => {
   if (b.openrouter_key) set('openrouter_key_enc', encrypt(String(b.openrouter_key)));
   if (b.picdrop_password) set('picdrop_password_enc', encrypt(String(b.picdrop_password)));
   for (const col of ['picdrop_host', 'picdrop_protocol', 'picdrop_port', 'picdrop_user', 'picdrop_base_path',
-    'default_dpi', 'default_crop_mode', 'concurrency', 'cricut_sheet_cm', 'monthly_budget', 'n8n_webhook_url']) {
+    'picdrop_default_gallery', 'default_dpi', 'default_crop_mode', 'concurrency', 'cricut_sheet_cm', 'monthly_budget', 'n8n_webhook_url']) {
     if (col in b) set(col, b[col] === '' ? null : b[col]);
   }
   if (!sets.length) return json({ ok: true });

src/pages/api/items/index.ts

@@ -24,7 +24,7 @@ export const GET: APIRoute = async ({ url, locals }) => {
 
   const rows = await query(
     `SELECT i.id, i.filename, i.output_px, i.has_alpha, i.result_path, i.folder_id,
-            i.delivery_status, i.created_at, u.display_name AS by_name,
+            i.delivery_status, i.created_at, i.model_used, u.display_name AS by_name,
             j.recipe_snapshot->'tasks' AS tasks
        FROM items i
        JOIN jobs j ON j.id = i.job_id

src/pages/api/models.ts

@@ -0,0 +1,13 @@
+import type { APIRoute } from 'astro';
+import { query } from '../../lib/db';
+
+export const prerender = false;
+
+// Aktive Modelle mit freundlichen Namen (für Studio-Auswahl + Ergebnis-Anzeige).
+export const GET: APIRoute = async ({ locals }) => {
+  if (!locals.user) return new Response('Unauthorized', { status: 401 });
+  const models = await query(
+    `SELECT model_id, label, description, is_default, supports_alpha FROM models
+     WHERE active ORDER BY sort, label`);
+  return new Response(JSON.stringify({ models }), { headers: { 'Content-Type': 'application/json' } });
+};