feat: integrate web terminal interface with xtermjs support

feat: add basic version control functionality using minigit
refactor: update context management and system message refresh
maintenance: update pyproject.toml version to 1.59.0
fix: handle api connection errors more gracefully
feat: add directory context tool

rp/core/api.py

@@ -50,12 +50,24 @@ def call_api(
         )
         if response.get("error"):
             if "status" in response:
-                logger.error(f"API HTTP Error: {response['status']} - {response.get('text', '')}")
-                logger.debug("=== API CALL FAILED ===")
-                return {
-                    "error": f"API Error: {response['status']}",
-                    "message": response.get("text", ""),
-                }
+                status = response['status']
+                text = response.get('text', '')
+                exception_msg = response.get('exception', '')
+
+                if status == 0:
+                    error_msg = f"Network/Connection Error: {exception_msg or 'Unable to connect to API server'}"
+                    if not exception_msg and not text:
+                        error_msg += f". Check if API URL is correct: {api_url}"
+                    logger.error(f"API Connection Error: {error_msg}")
+                    logger.debug("=== API CALL FAILED ===")
+                    return {"error": error_msg}
+                else:
+                    logger.error(f"API HTTP Error: {status} - {text}")
+                    logger.debug("=== API CALL FAILED ===")
+                    return {
+                        "error": f"API Error {status}: {text or 'No response text'}",
+                        "message": text,
+                    }
             else:
                 logger.error(f"API call failed: {response.get('exception', 'Unknown error')}")
                 logger.debug("=== API CALL FAILED ===")