clan-app: change ApiBridge ABC class to Protocol

pkgs/clan-app/clan_app/api/api_bridge.py

@@ -1,9 +1,8 @@
 import logging
 import threading
-from abc import ABC, abstractmethod
 from contextlib import ExitStack
-from dataclasses import dataclass, field
-from typing import TYPE_CHECKING, Any
+from dataclasses import dataclass
+from typing import TYPE_CHECKING, Any, Protocol
 
 from clan_lib.api import ApiError, ApiResponse, ErrorDataClass
 from clan_lib.api.tasks import WebThread
@@ -30,16 +29,13 @@ class BackendResponse:
     _op_key: str
 
 
-@dataclass
-class ApiBridge(ABC):
+class ApiBridge(Protocol):
     """Generic interface for API bridges that can handle method calls from different sources."""
 
     middleware_chain: tuple["Middleware", ...]
-    threads: dict[str, WebThread] = field(default_factory=dict)
+    threads: dict[str, WebThread]
 
-    @abstractmethod
-    def send_api_response(self, response: BackendResponse) -> None:
-        """Send response back to the client."""
+    def send_api_response(self, response: BackendResponse) -> None: ...
 
     def process_request(self, request: BackendRequest) -> None:
         """Process an API request through the middleware chain."""

pkgs/clan-app/clan_app/deps/webview/webview_bridge.py

@@ -1,6 +1,6 @@
 import json
 import logging
-from dataclasses import dataclass
+from dataclasses import dataclass, field
 from typing import TYPE_CHECKING
 
 from clan_lib.api import dataclass_to_dict
@@ -9,6 +9,8 @@ from clan_lib.api.tasks import WebThread
 from clan_app.api.api_bridge import ApiBridge, BackendRequest, BackendResponse
 
 if TYPE_CHECKING:
+    from clan_app.api.middleware import Middleware
+
     from .webview import Webview
 
 log = logging.getLogger(__name__)
@@ -19,7 +21,8 @@ class WebviewBridge(ApiBridge):
     """Webview-specific implementation of the API bridge."""
 
     webview: "Webview"
-    threads: dict[str, WebThread]  # Inherited from ApiBridge
+    middleware_chain: tuple["Middleware", ...]
+    threads: dict[str, WebThread] = field(default_factory=dict)
 
     def send_api_response(self, response: BackendResponse) -> None:
         """Send response back to the webview client."""