feat(agent): emit tool events and feedback for hook results

Add ToolExecStart event emission and tool feedback for hook results to ensure consistent behavior between normal tool execution and hook bypass scenarios. This maintains parity in event tracking and user feedback when tools are executed via hooks.

pkg/agent/loop.go

@@ -2260,6 +2260,36 @@ turnLoop:
 					// Hook returns result directly, skip tool execution
 					if toolReq != nil && toolReq.HookResult != nil {
 						hookResult := toolReq.HookResult
+
+						// Emit ToolExecStart event (same as normal tool execution)
+						al.emitEvent(
+							EventKindToolExecStart,
+							ts.eventMeta("runTurn", "turn.tool.start"),
+							ToolExecStartPayload{
+								Tool:      toolName,
+								Arguments: cloneEventArguments(toolArgs),
+							},
+						)
+
+						// Send tool feedback to chat channel if enabled (same as normal tool execution)
+						if al.cfg.Agents.Defaults.IsToolFeedbackEnabled() &&
+							ts.channel != "" &&
+							!ts.opts.SuppressToolFeedback {
+							argsJSON, _ := json.Marshal(toolArgs)
+							feedbackPreview := utils.Truncate(
+								string(argsJSON),
+								al.cfg.Agents.Defaults.GetToolFeedbackMaxArgsLength(),
+							)
+							feedbackMsg := fmt.Sprintf("\U0001f527 `%s`\n```\n%s\n```", toolName, feedbackPreview)
+							fbCtx, fbCancel := context.WithTimeout(turnCtx, 3*time.Second)
+							_ = al.bus.PublishOutbound(fbCtx, bus.OutboundMessage{
+								Channel: ts.channel,
+								ChatID:  ts.chatID,
+								Content: feedbackMsg,
+							})
+							fbCancel()
+						}
+
 						toolDuration := time.Duration(0) // Hook execution time unknown
 
 						// Emit ToolExecEnd event
@@ -2285,6 +2315,11 @@ turnLoop:
 							})
 						}
 
+						// Track response handling status (same as normal tool execution)
+						if !hookResult.ResponseHandled {
+							allResponsesHandled = false
+						}
+
 						// Build tool message
 						contentForLLM := hookResult.ContentForLLM()
 						if al.cfg.Tools.IsFilterSensitiveDataEnabled() {