fix(chat): add Missing Required Parameter title mapping for tool arg errors and tests

- Map "Roo tried to use ... without value for required parameter" to 'Missing Required Parameter'
- Keep existing 'Invalid Tool Arguments' mapping
- Add unit test covering the exact screenshot string
- No backend changes; only ChatView title extraction

Author: Merge Resolver

webview-ui/src/utils/__tests__/errorTitleExtractor.spec.ts

@@ -226,6 +226,11 @@ describe("extractErrorTitle", () => {
 			expect(extractErrorTitle(error, mockT)).toBe("Invalid Tool Arguments")
 		})
 
+		it("should handle missing required parameter tool error", () => {
+			const error = "Roo tried to use apply_diff without value for required parameter 'path'. Retrying..."
+			expect(extractErrorTitle(error, mockT)).toBe("Missing Required Parameter")
+		})
+
 		it("should handle file not found error from actual code", () => {
 			const error =
 				"File does not exist at path: /Users/test/project/src/app.ts\n\n<error_details>\nThe specified file could not be found. Please verify the file path and try again.\n</error_details>"

webview-ui/src/utils/errorTitleExtractor.ts

@@ -103,6 +103,17 @@ export function extractErrorTitle(errorContent: string, t: TFunction): string {
 			pattern: /^Failed to apply diff:/i,
 			title: "Diff Application Failed",
 		},
+		// Roo chat errors generated when tool args are missing/invalid
+		{
+			// Example: Roo tried to use apply_diff without value for required parameter 'path'. Retrying...
+			pattern: /^Roo tried to use .+ without value for required parameter ['"“”‘’][^'"“”‘’]+['"“”‘’]/i,
+			title: "Missing Required Parameter",
+		},
+		{
+			// Fallback without quoting the param
+			pattern: /^Roo tried to use .+ without value for required parameter/i,
+			title: "Missing Required Parameter",
+		},
 	]
 
 	// API and service error patterns