fix(media): save browser screenshots and TTS audio to workspace instead of /tmp

Screenshots saved to {workspace}/screenshots/, TTS audio to {workspace}/tts/.
Agents can now access these files via read_file. Falls back to os.TempDir()
when workspace is unavailable.

internal/tools/tts.go

@@ -101,9 +101,16 @@ func (t *TtsTool) Execute(ctx context.Context, args map[string]any) *Result {
 		return &Result{ForLLM: fmt.Sprintf("error: tts failed: %s", err.Error()), IsError: true}
 	}
 
-	// Write audio to temp file
-	tmpDir := os.TempDir()
-	audioPath := filepath.Join(tmpDir, fmt.Sprintf("tts-%d.%s", time.Now().UnixNano(), result.Extension))
+	// Write audio to workspace/tts/ so the agent can access the file.
+	// Falls back to os.TempDir() if workspace is not available.
+	ttsDir := os.TempDir()
+	if ws := ToolWorkspaceFromCtx(ctx); ws != "" {
+		ttsDir = filepath.Join(ws, "tts")
+	}
+	if err := os.MkdirAll(ttsDir, 0755); err != nil {
+		return &Result{ForLLM: fmt.Sprintf("error: create tts directory: %s", err.Error()), IsError: true}
+	}
+	audioPath := filepath.Join(ttsDir, fmt.Sprintf("tts-%d.%s", time.Now().UnixNano(), result.Extension))
 	if err := os.WriteFile(audioPath, result.Audio, 0644); err != nil {
 		return &Result{ForLLM: fmt.Sprintf("error: write tts audio: %s", err.Error()), IsError: true}
 	}

pkg/browser/tool.go

@@ -275,8 +275,16 @@ func (t *BrowserTool) handleScreenshot(ctx context.Context, args map[string]any)
 		return tools.ErrorResult(fmt.Sprintf("screenshot failed: %v", err))
 	}
 
-	// Save to temp file so the media pipeline can deliver it (e.g. Telegram sendPhoto)
-	imagePath := filepath.Join(os.TempDir(), fmt.Sprintf("goclaw_screenshot_%d.png", time.Now().UnixNano()))
+	// Save to workspace/screenshots/ so the agent can access the file.
+	// Falls back to os.TempDir() if workspace is not available.
+	screenshotDir := filepath.Join(os.TempDir(), "goclaw_screenshots")
+	if ws := tools.ToolWorkspaceFromCtx(ctx); ws != "" {
+		screenshotDir = filepath.Join(ws, "screenshots")
+	}
+	if err := os.MkdirAll(screenshotDir, 0755); err != nil {
+		return tools.ErrorResult(fmt.Sprintf("failed to create screenshots directory: %v", err))
+	}
+	imagePath := filepath.Join(screenshotDir, fmt.Sprintf("screenshot_%d.png", time.Now().UnixNano()))
 	if err := os.WriteFile(imagePath, data, 0644); err != nil {
 		return tools.ErrorResult(fmt.Sprintf("failed to save screenshot: %v", err))
 	}