Strengthen Gemini JSON output and range UI

backend/services/gemini.go

@@ -62,6 +62,18 @@ User query: ` + query,
 			"responseMimeType": "application/json",
 			"temperature":      0.2,
 			"maxOutputTokens":  220,
+			"responseSchema": map[string]any{
+				"type": "OBJECT",
+				"properties": map[string]any{
+					"querywords": map[string]any{
+						"type": "ARRAY",
+						"items": map[string]any{
+							"type": "STRING",
+						},
+					},
+				},
+				"required": []string{"querywords"},
+			},
 		},
 	}
 
@@ -92,6 +104,18 @@ User query: ` + query,
 				"responseMimeType": "application/json",
 				"temperature":      0.1,
 				"maxOutputTokens":  220,
+				"responseSchema": map[string]any{
+					"type": "OBJECT",
+					"properties": map[string]any{
+						"querywords": map[string]any{
+							"type": "ARRAY",
+							"items": map[string]any{
+								"type": "STRING",
+							},
+						},
+					},
+					"required": []string{"querywords"},
+				},
 			},
 		}
 		rawText, retryErr := g.generateText(strictBody)