refactor(modules): improve exception handling and simplify service usage

Enhancements
- Replace bare `except:` with `except Exception:` in multiple modules- Cast step calculation to `int` for consistent type
- Simplify `get_battery_icon_file` to return a string directly
- Use `get_todo_service()` instead of module-level `todo_service` throughout todo widget
- Remove unused `"zen": "zen-browser"` mapping entry

Bug Fixes
- Prevent bare exception swallowing by catching `Exception` explicitly
- Ensure proper cleanup of timer IDs and other resources
- Delete unused modules/osdd components

New Features
- None

modules/launcher/plugins/bookmarks.py

@@ -29,7 +29,7 @@ class BookmarkManager:
         try:
             parsed = urlparse(url)
             return f"{parsed.scheme}://{parsed.netloc}/favicon.ico"
-        except:
+        except Exception:
             return ""
 
     def _extract_domain(self, url: str) -> str:
@@ -41,7 +41,7 @@ class BookmarkManager:
             if domain.startswith("www."):
                 domain = domain[4:]
             return domain
-        except:
+        except Exception:
             return url
 
     def _normalize_url(self, url: str) -> str:
@@ -683,7 +683,7 @@ class BookmarksPlugin(PluginBase):
             if domain.startswith("www."):
                 domain = domain[4:]
             return domain
-        except:
+        except Exception:
             return url
 
     def _open_bookmark(self, url: str):

modules/launcher/plugins/password.py

@@ -497,7 +497,7 @@ class PasswordPlugin(PluginBase):
                             f"Password '{name}' {action_word} successfully",
                         ]
                     )
-                except:
+                except Exception:
                     pass
             else:
                 print(f"Failed to add password '{name}'")
@@ -524,7 +524,7 @@ class PasswordPlugin(PluginBase):
                             f"Password '{name}' removed successfully",
                         ]
                     )
-                except:
+                except Exception:
                     pass
             else:
                 print(f"Failed to remove password '{name}'")
@@ -564,7 +564,7 @@ class PasswordPlugin(PluginBase):
                             f"Password for '{name}' copied to clipboard",
                         ]
                     )
-                except:
+                except Exception:
                     pass
 
                 # Clear cache to force refresh

modules/launcher/plugins/wallpaper.py

@@ -314,11 +314,11 @@ class WallpaperPlugin(PluginBase):
         )
         return filename
 
-    def _hsl_to_rgb_hex(self, h: float, s: float = 1.0, l: float = 0.5) -> str:
+    def _hsl_to_rgb_hex(self, h: float, s: float = 1.0, l_val: float = 0.5) -> str:
         """Convert HSL color value to RGB HEX string."""
         # colorsys uses HLS, not HSL, and expects values between 0.0 and 1.0
         hue = h / 360.0
-        r, g, b = colorsys.hls_to_rgb(hue, l, s)  # Note the order: H, L, S
+        r, g, b = colorsys.hls_to_rgb(hue, l_val, s)  # Note the order: H, L, S
         r_int, g_int, b_int = int(r * 255), int(g * 255), int(b * 255)
         return f"#{r_int:02X}{g_int:02X}{b_int:02X}"