chore: Retire TECH_DEBT.md in favour of issues

AGENTS.md

@@ -35,13 +35,12 @@ This is a **single SvelteKit application** (not a monorepo).
 ├── e2e/                  # Playwright E2E tests
 ├── static/               # Static assets
 ├── docker/Dockerfile     # Production container image
-├── CLAUDE.md             # AI assistant instructions
-└── TECH_DEBT.md          # Known tech debt and deferred security concerns
+└── CLAUDE.md             # AI assistant instructions
 ```
 
 ## Tech Debt
 
-When introducing shortcuts, known issues, or deferred security work, add an entry to `TECH_DEBT.md`. Keep entries concise: what the issue is, why it is acceptable now, and what the correct long-term fix is.
+When introducing shortcuts, known issues, or deferred security work, file an issue with the `tech-debt` label. Keep it concise: what the issue is, why it is acceptable now, and what the correct long-term fix is.
 
 ## Development Guidelines
 

src/lib/storage/download.ts

@@ -12,7 +12,7 @@
  * Note: The response body is buffered as a Blob before the download link is
  * constructed. This avoids exposing credentials in the URL (query-param approach)
  * while keeping the implementation simple. For very large files this will use
- * proportional browser memory — see TECH_DEBT.md for the long-term fix.
+ * proportional browser memory.
  */
 
 import { STORAGE_CONNECTION_HEADER } from '$lib/storage/connection-storage.js';

vite.config.ts

@@ -16,7 +16,6 @@ export default defineConfig({
       strategy: ['cookie', 'preferredLanguage', 'baseLocale']
     })
   ],
-  server: { allowedHosts: true },
   test: {
     coverage: {
       provider: 'v8',