feat: migrate to Next.js for Mini App and enhance project structure

- Replaced the previous webapp with a new Mini App built using Next.js, improving performance and maintainability.
- Updated the `.gitignore` to exclude Next.js build artifacts and node modules.
- Revised documentation in `AGENTS.md`, `README.md`, and `architecture.md` to reflect the new Mini App structure and technology stack.
- Enhanced Dockerfile to support the new build process for the Next.js application.
- Updated CI workflow to build and test the Next.js application.
- Added new configuration options for the Mini App, including `MINI_APP_SHORT_NAME` for improved deep linking.
- Refactored frontend testing setup to accommodate the new structure and testing framework.
- Removed legacy webapp files and dependencies to streamline the project.

duty_teller/config.py

@@ -111,6 +111,7 @@ class Settings:
     database_url: str
     bot_username: str
     mini_app_base_url: str
+    mini_app_short_name: str
     http_host: str
     http_port: int
     allowed_usernames: set[str]
@@ -168,6 +169,7 @@ class Settings:
             database_url=database_url,
             bot_username=bot_username,
             mini_app_base_url=os.getenv("MINI_APP_BASE_URL", "").rstrip("/"),
+            mini_app_short_name=(os.getenv("MINI_APP_SHORT_NAME", "") or "").strip().strip("/"),
             http_host=http_host,
             http_port=http_port,
             allowed_usernames=allowed,
@@ -197,6 +199,7 @@ BOT_TOKEN = _settings.bot_token
 DATABASE_URL = _settings.database_url
 BOT_USERNAME = _settings.bot_username
 MINI_APP_BASE_URL = _settings.mini_app_base_url
+MINI_APP_SHORT_NAME = _settings.mini_app_short_name
 HTTP_HOST = _settings.http_host
 HTTP_PORT = _settings.http_port
 ALLOWED_USERNAMES = _settings.allowed_usernames