fix: comment out unimplemented Gemini tool types to fix TypeScript errors

The Google GenAI library does not yet support responseSchema and codeExecution
tool types. The UI checkboxes are added for future use, with backend implementation
commented out until library support is available.

Author: roomote

src/api/providers/gemini.ts

@@ -78,17 +78,22 @@ export class GeminiHandler extends BaseProvider implements SingleCompletionHandl
 			tools.push({ googleSearch: {} })
 		}
 
-		if (this.options.enableStructuredOutput) {
-			// Structured output configuration
-			// This would typically be configured with response schemas
-			// For now, we're adding the capability placeholder
-			tools.push({ responseSchema: {} })
-		}
-
-		if (this.options.enableCodeExecution) {
-			// Code execution tool configuration
-			tools.push({ codeExecution: {} })
-		}
+		// Note: Structured Output and Code Execution features are configured in the UI
+		// but not yet implemented in the backend as the Google GenAI library
+		// doesn't support these tool types yet. These will be enabled when
+		// the library adds support for:
+		// - responseSchema for structured output
+		// - codeExecution for code execution capabilities
+
+		// if (this.options.enableStructuredOutput) {
+		//     // Will be enabled when library supports responseSchema
+		//     tools.push({ responseSchema: {} })
+		// }
+
+		// if (this.options.enableCodeExecution) {
+		//     // Will be enabled when library supports codeExecution
+		//     tools.push({ codeExecution: {} })
+		// }
 
 		const config: GenerateContentConfig = {
 			systemInstruction,
@@ -222,12 +227,16 @@ export class GeminiHandler extends BaseProvider implements SingleCompletionHandl
 			if (this.options.enableGrounding) {
 				tools.push({ googleSearch: {} })
 			}
-			if (this.options.enableStructuredOutput) {
-				tools.push({ responseSchema: {} })
-			}
-			if (this.options.enableCodeExecution) {
-				tools.push({ codeExecution: {} })
-			}
+			// Note: Structured Output and Code Execution features are configured in the UI
+			// but not yet implemented here as the Google GenAI library
+			// doesn't support these tool types yet.
+
+			// if (this.options.enableStructuredOutput) {
+			//     tools.push({ responseSchema: {} })
+			// }
+			// if (this.options.enableCodeExecution) {
+			//     tools.push({ codeExecution: {} })
+			// }
 			const promptConfig: GenerateContentConfig = {
 				httpOptions: this.options.googleGeminiBaseUrl
 					? { baseUrl: this.options.googleGeminiBaseUrl }