feat(chat): add overrides for direct instruction passing in tool calls

Introduce temporary global variables `editInstructionOverride` and `scaffoldDescriptionOverride` to pass instructions from the AI agent directly to the edit and scaffold commands. This avoids interactive prompts and enables seamless tool integration without major refactoring. Resets overrides after execution.

cmd/chat.go

@@ -184,16 +184,20 @@ func handleToolCall(reply string, history *[]map[string]string) {
 	switch tc.Tool {
 	case "edit":
 		if tc.File != "" && tc.Instruction != "" {
-			// Directly call the edit command's Run function with arguments
+			// Pass the instruction directly to the edit command
 			editCmd.SetArgs([]string{tc.File})
-			// We temporarily override the instruction via a global or flag if needed.
-			// For now we just run the normal edit flow (it will ask for instruction interactively)
+			// We set a temporary global so the edit command can pick up the instruction
+			// (this is the simplest way without refactoring every command)
+			editInstructionOverride = tc.Instruction
 			_ = editCmd.Execute()
+			editInstructionOverride = "" // reset
 		}
 	case "scaffold":
 		if tc.Path != "" && tc.Description != "" {
 			scaffoldCmd.SetArgs([]string{tc.Path})
+			scaffoldDescriptionOverride = tc.Description
 			_ = scaffoldCmd.Execute()
+			scaffoldDescriptionOverride = ""
 		}
 	case "testgen":
 		if tc.File != "" {
@@ -215,3 +219,9 @@ func handleToolCall(reply string, history *[]map[string]string) {
 
 	*history = append(*history, map[string]string{"role": "assistant", "content": reply})
 }
+
+// Temporary overrides so the existing command logic can pick up the instruction from the agent
+var (
+	editInstructionOverride     string
+	scaffoldDescriptionOverride string
+)