feat: add template upload/download/delete endpoints

Belge Şablonları now stores real files: POST /api/templates/upload
(multer -> Supabase Storage under templates/<user>/, then a templates
row), GET /api/templates/:id/download-url (short-lived signed URL),
and DELETE /api/templates/:id. Mounted at /api/templates.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/routes/index.ts

@@ -3,6 +3,7 @@ import documentRoutes from './document.routes';
 import chatRoutes from './chat.routes';
 import precedentRoutes from './precedent.routes';
 import caseRoutes from './case.routes';
+import templateRoutes from './template.routes';
 
 const router = Router();
 
@@ -13,6 +14,7 @@ router.get('/health', (req, res) => {
 router.use('/documents', documentRoutes);
 router.use('/chat', chatRoutes);
 router.use('/cases', caseRoutes);
+router.use('/templates', templateRoutes);
 router.use('/', precedentRoutes); // Keeps the same paths like /api/search-precedents
 
 export default router;

src/routes/template.routes.ts

@@ -0,0 +1,13 @@
+import { Router } from 'express';
+import multer from 'multer';
+import { requireAuth } from '../middleware/auth';
+import { uploadTemplate, getTemplateDownloadUrl, deleteTemplate } from '../controllers/template.controller';
+
+const router = Router();
+const upload = multer({ storage: multer.memoryStorage() });
+
+router.post('/upload', upload.single('file'), requireAuth, uploadTemplate);
+router.get('/:templateId/download-url', requireAuth, getTemplateDownloadUrl);
+router.delete('/:templateId', requireAuth, deleteTemplate);
+
+export default router;