Improve exception handling with specific exception types

Co-authored-by: codingwithnsh <138281862+codingwithnsh@users.noreply.github.com>

Author: Copilot

mac_ui_enhancements.py

@@ -358,11 +358,11 @@ def preview(self, filepath):
             text_widget.pack(fill=tk.BOTH, expand=True)
 
             try:
-                with open(filepath, 'r') as f:
+                with open(filepath, 'r', encoding='utf-8') as f:
                     text_widget.insert('1.0', f.read())
                 text_widget.config(state='disabled')
-            except:
-                text_widget.insert('1.0', "Cannot preview this file")
+            except (UnicodeDecodeError, FileNotFoundError, PermissionError, OSError) as e:
+                text_widget.insert('1.0', f"Cannot preview this file: {str(e)}")
 
         elif ext in ['.png', '.jpg', '.jpeg', '.gif', '.bmp']:
             # Image preview
@@ -375,8 +375,8 @@ def preview(self, filepath):
                 label = tk.Label(content, image=photo, bg='#1a1a1a')
                 label.image = photo  # Keep reference
                 label.pack(expand=True)
-            except:
-                tk.Label(content, text="Cannot preview image", bg='#1a1a1a',
+            except (ImportError, IOError, OSError) as e:
+                tk.Label(content, text=f"Cannot preview image: {str(e)}", bg='#1a1a1a',
                         fg='white', font=('Arial', 14)).pack(expand=True)
 
         else:

sandbox_manager.py

@@ -63,7 +63,7 @@ def create(self):
             self.save_config()
 
             return True
-        except Exception as e:
+        except (OSError, PermissionError) as e:
             print(f"Error creating sandbox: {e}")
             return False
 
@@ -92,10 +92,10 @@ def stop(self):
                 try:
                     proc.terminate()
                     proc.wait(timeout=3)
-                except:
+                except (subprocess.TimeoutExpired, ProcessLookupError):
                     try:
                         proc.kill()
-                    except:
+                    except (ProcessLookupError, PermissionError):
                         pass
                 finally:
                     if proc in self.processes:
@@ -118,7 +118,7 @@ def pause(self):
             for proc in self.processes:
                 try:
                     proc.suspend()
-                except:
+                except (AttributeError, ProcessLookupError, PermissionError):
                     pass
 
             self.status = "paused"
@@ -138,7 +138,7 @@ def resume(self):
             for proc in self.processes:
                 try:
                     proc.resume()
-                except:
+                except (AttributeError, ProcessLookupError, PermissionError):
                     pass
 
             self.status = "running"
@@ -210,7 +210,7 @@ def update_stats(self):
                     p = psutil.Process(proc.pid)
                     total_cpu += p.cpu_percent(interval=0.1)
                     total_memory += p.memory_info().rss / (1024 * 1024)  # MB
-                except:
+                except (psutil.NoSuchProcess, psutil.AccessDenied, psutil.ZombieProcess):
                     if proc in self.processes:
                         self.processes.remove(proc)