fix: onboarding auth, stale CI build, autocomplete attrs

- Add identity.create + server.echo to UNAUTHENTICATED_METHODS
- Clear web/dist before frontend build to prevent stale artifacts
- Add autocomplete attrs to login inputs

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/build-iso.yml

@@ -22,7 +22,9 @@ jobs:
           cargo build --release --manifest-path core/Cargo.toml
 
       - name: Build frontend
-        run: cd neode-ui && npm ci && npm run build
+        run: |
+          rm -rf web/dist/neode-ui
+          cd neode-ui && npm ci && npm run build
 
       - name: Type check frontend
         run: cd neode-ui && npx vue-tsc -b --noEmit