refactor: enhance TimerPage layout and functionality; update theme and tokens for improved design consistency

- Refactored TimerPage component to improve layout and user experience.
- Updated theme configuration to utilize design tokens for better maintainability.
- Introduced new tokens for colors and typography to align with design principles.
- Simplified state management and improved timer functionality.
- Enhanced accessibility and responsiveness of UI elements.

backend/app/settings_schema.py

@@ -49,6 +49,9 @@ class PomodoroSettings(BaseModel):
     alarm_sound: bool = True
     alarm_volume: int = Field(default=70, ge=0, le=100)
 
+    timer_enabled: bool = True
+    """When false the timer controls are hidden — the app becomes view-only."""
+
     desktop_notifications: bool = True
     keep_on_top_during_work: bool = False
     """Desktop app: float the window above everything while a work interval runs."""
@@ -76,12 +79,6 @@ class JiraSourceSettings(BaseModel):
 
     max_issues: int = Field(default=200, ge=1, le=2000)
 
-    writeback_done: bool = True
-    """Completing a Jira task here transitions the issue to Done in Jira."""
-
-    done_transition_name: str = "Done"
-    """Preferred transition name when writing back; falls back to any 'done' one."""
-
 
 class GoogleTasksSourceSettings(BaseModel):
     """Google Tasks, via an OAuth refresh token (see jira-helper's README)."""
@@ -96,8 +93,6 @@ class GoogleTasksSourceSettings(BaseModel):
     include_undated: bool = True
     """Keep tasks with no due date (jira-helper drops them; here they are todos)."""
 
-    writeback_done: bool = True
-
 
 class TodoistSourceSettings(BaseModel):
     """Todoist, via a personal API token."""
@@ -110,8 +105,6 @@ class TodoistSourceSettings(BaseModel):
     filter_query: str = ""
     """Override the server-side filter. Empty = all open tasks."""
 
-    writeback_done: bool = True
-
 
 class LaundrySourceSettings(BaseModel):
     """Campus laundry bookings — not a todo, but a thing that owns your time."""
@@ -157,13 +150,23 @@ class BlockerSettings(BaseModel):
 
     block_during_breaks: bool = False
     blocked_domains: list[str] = Field(default_factory=list)
-    """Bare hostnames, e.g. `youtube.com`. `www.` and subdomains are added for you."""
+    """Hostnames or masks.
+
+    `youtube.com` blocks the site (plus `www.` and `m.`); `*.youtube.com` blocks
+    its subdomains too, expanded with `subdomain_expansions` because a hosts file
+    has no wildcards of its own.
+    """
 
     allowed_domains: list[str] = Field(default_factory=list)
-    """Exceptions that survive a wildcard entry, e.g. `music.youtube.com`."""
+    """Exceptions, masks allowed: `music.youtube.com`, `*.docs.google.com`."""
+
+    subdomain_expansions: list[str] = Field(
+        default_factory=lambda: ["www", "m", "mobile", "app", "web", "i", "old", "new"]
+    )
+    """What `*.example.com` turns into. Add the subdomains you actually visit."""
 
     blocked_apps: list[str] = Field(default_factory=list)
-    """Process names, e.g. `steam`, `discord`, `Telegram`."""
+    """Process names or masks: `steam`, `*discord*`, `telegram-*`."""
 
     kill_blocked_apps: bool = True
     """Terminate a blocked app when it appears; otherwise only warn and log."""