feat: Improve Version Update Mechanism with Robust Error Handling

- Enhance GitHub API version check with proper headers and timeout
- Add comprehensive error handling for version retrieval
- Implement more reliable update script download and execution
- Improve cross-platform update process with better error reporting
- Add fallback mechanisms for network and update failures

main.py

@@ -210,30 +210,78 @@ def check_latest_version():
     try:
         print(f"\n{Fore.CYAN}{EMOJI['UPDATE']} {translator.get('updater.checking')}{Style.RESET_ALL}")
         
-        # Get latest version from GitHub API with timeout
-        response = requests.get("https://api.github.com/repos/yeongpin/cursor-free-vip/releases/latest", timeout=5)
-        latest_version = response.json()["tag_name"].lstrip('v')
+        # Get latest version from GitHub API with timeout and proper headers
+        headers = {
+            'Accept': 'application/vnd.github.v3+json',
+            'User-Agent': 'CursorFreeVIP-Updater'
+        }
+        response = requests.get(
+            "https://api.github.com/repos/yeongpin/cursor-free-vip/releases/latest",
+            headers=headers,
+            timeout=10
+        )
+        
+        # Check if response is successful
+        if response.status_code != 200:
+            raise Exception(f"GitHub API returned status code {response.status_code}")
+            
+        response_data = response.json()
+        if "tag_name" not in response_data:
+            raise Exception("No version tag found in GitHub response")
+            
+        latest_version = response_data["tag_name"].lstrip('v')
+        
+        # Validate version format
+        if not latest_version:
+            raise Exception("Invalid version format received")
         
         if latest_version != version:
             print(f"\n{Fore.YELLOW}{EMOJI['INFO']} {translator.get('updater.new_version_available', current=version, latest=latest_version)}{Style.RESET_ALL}")
             
-            # Execute update command based on platform
-            if platform.system() == 'Windows':
-                update_command = 'irm https://raw.githubusercontent.com/yeongpin/cursor-free-vip/main/scripts/install.ps1 | iex'
-                subprocess.run(['powershell', '-NoProfile', '-ExecutionPolicy', 'Bypass', '-Command', update_command], check=True)
-            else:
-                update_command = 'curl -fsSL https://raw.githubusercontent.com/yeongpin/cursor-free-vip/main/scripts/install.sh -o install.sh && chmod +x install.sh && ./install.sh'
-                subprocess.Popen(update_command, shell=True)
-            
-            print(f"\n{Fore.GREEN}{EMOJI['SUCCESS']} {translator.get('updater.updating')}{Style.RESET_ALL}")
-            sys.exit(0)
+            try:
+                # Execute update command based on platform
+                if platform.system() == 'Windows':
+                    update_command = 'irm https://raw.githubusercontent.com/yeongpin/cursor-free-vip/main/scripts/install.ps1 | iex'
+                    subprocess.run(['powershell', '-NoProfile', '-ExecutionPolicy', 'Bypass', '-Command', update_command], check=True)
+                else:
+                    # For Linux/Mac, download and execute the install script
+                    install_script_url = 'https://raw.githubusercontent.com/yeongpin/cursor-free-vip/main/scripts/install.sh'
+                    
+                    # First verify the script exists
+                    script_response = requests.get(install_script_url, timeout=5)
+                    if script_response.status_code != 200:
+                        raise Exception("Installation script not found")
+                        
+                    # Save and execute the script
+                    with open('install.sh', 'wb') as f:
+                        f.write(script_response.content)
+                    
+                    os.chmod('install.sh', 0o755)  # Make executable
+                    subprocess.run(['./install.sh'], check=True)
+                    
+                    # Clean up
+                    if os.path.exists('install.sh'):
+                        os.remove('install.sh')
+                
+                print(f"\n{Fore.GREEN}{EMOJI['SUCCESS']} {translator.get('updater.updating')}{Style.RESET_ALL}")
+                sys.exit(0)
+                
+            except Exception as update_error:
+                print(f"{Fore.RED}{EMOJI['ERROR']} {translator.get('updater.update_failed', error=str(update_error))}{Style.RESET_ALL}")
+                print(f"{Fore.YELLOW}{EMOJI['INFO']} {translator.get('updater.manual_update_required')}{Style.RESET_ALL}")
+                return
         else:
             print(f"{Fore.GREEN}{EMOJI['SUCCESS']} {translator.get('updater.up_to_date')}{Style.RESET_ALL}")
             
+    except requests.exceptions.RequestException as e:
+        print(f"{Fore.RED}{EMOJI['ERROR']} {translator.get('updater.network_error', error=str(e))}{Style.RESET_ALL}")
+        print(f"{Fore.YELLOW}{EMOJI['INFO']} {translator.get('updater.continue_anyway')}{Style.RESET_ALL}")
+        return
+        
     except Exception as e:
         print(f"{Fore.RED}{EMOJI['ERROR']} {translator.get('updater.check_failed', error=str(e))}{Style.RESET_ALL}")
         print(f"{Fore.YELLOW}{EMOJI['INFO']} {translator.get('updater.continue_anyway')}{Style.RESET_ALL}")
-        return  # Continue with the program instead of blocking
+        return
 
 def main():
     print_logo()