refactor(ai_client): remove ProviderError class; ErrorInfo is the new error type

src/ai_client.py

@@ -76,31 +76,6 @@ _history_trunc_limit: int = 8000
 # Global event emitter for API lifecycle events
 events: EventEmitter = EventEmitter()
 
-class ProviderError(Exception):
- def __init__(self, kind: str, provider: str, original: Exception) -> None:
-  """
-  [C: src/api_hooks.py:HookServerInstance.__init__, src/mcp_client.py:_DDGParser.__init__, src/mcp_client.py:_TextExtractor.__init__]
-  """
-  self.kind = kind
-  self.provider = provider
-  self.original = original
-  super().__init__(str(original))
-
- def ui_message(self) -> str:
-  """
-  [C: src/app_controller.py:AppController._handle_request_event, src/app_controller.py:_api_generate]
-  """
-  labels = {
-   "quota":      "QUOTA EXHAUSTED",
-   "rate_limit": "RATE LIMITED",
-   "auth":       "AUTH / API KEY ERROR",
-   "balance":    "BALANCE / BILLING ERROR",
-   "network":    "NETWORK / CONNECTION ERROR",
-   "unknown":    "API ERROR",
-  }
-  label = labels.get(self.kind, "API ERROR")
-  return f"[{self.provider.upper()} {label}]\n\n{self.original}"
-
 #region: Provider Configuration
 
 def set_model_params(temp: float, max_tok: int, trunc_limit: int = 8000, top_p: float = 1.0) -> None:
@@ -1451,9 +1426,6 @@ def _send_anthropic_result(md_content: str, user_message: str, base_dir: str, fi
   res = final_text if final_text.strip() else "(No text returned by the model)"
   if monitor.enabled: monitor.end_component("ai_client._send_anthropic")
   return Result(data=res)
- except ProviderError:
-  if monitor.enabled: monitor.end_component("ai_client._send_anthropic")
-  raise
  except Exception as exc:
   if monitor.enabled: monitor.end_component("ai_client._send_anthropic")
   return Result(data="", errors=[_classify_anthropic_error(exc, source="ai_client.anthropic")])