fix: configure gitea webhook auto-deploy, fix NVS CRC, and improve flash UI

- Add deploy-host.sh for webhook-triggered docker redeploy
- Update docker-compose.yml and nginx.conf for auto-pull setup
- Fix vite.config.js and admin router for deployment environment
- Fix NVS CRC seed to use 0xFFFFFFFF to match esp_rom_crc32_le
- Add dual-panel flash UI: esptool log + live 115200 serial monitor
- Auto-reset device via RTS after flash (no manual power cycle needed)
- Clean up Header.jsx debug title text

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -1,3 +1,8 @@
+# Auto-deploy generated files
+deploy.sh
+deploy.log
+.deploy-trigger
+
 # Secrets
 .env
 firebase-service-account.json
@@ -25,4 +30,6 @@ dist/
 .DS_Store
 Thumbs.db
 
-.MAIN-APP-REFERENCE/
+.MAIN-APP-REFERENCE/
+
+.project-vesper-plan.md