Lataa EyeRest 1.2.0

## Highlights

EyeRest 1.2.0 introduces a more flexible reminder workflow, an optional
left-click toggle, and a small About dialog – while keeping the app lightweight
and telemetry-free.

### ✨ What’s new

- Configurable reminder interval (per session)
- You can now adjust the reminder interval in minutes (e.g. 5, 20, 45…) instead
of being locked to 20 minutes.
- The default interval is still 20 minutes in Release builds (with a shorter
interval in Debug for testing).
- Optional left-click toggle
- A new option lets you use left-click on the tray icon to toggle reminders on
or off.
- When enabled, a single left-click:
- Flips the reminder state,
- Updates the tray icon (normal vs. snoozed),
- Shows a short confirmation notification.
- When disabled, a single left-click simply opens the Options dialog for better
discoverability.
- About dialog
- A new About window shows:
- App name and version (from assembly metadata),
- Author information,
- A short privacy note (no telemetry, no personal data collection),
- A direct link to the GitHub repository.
- Toast notifications with balloon fallback
- EyeRest now prefers Windows 10/11 toast notifications (via
Microsoft.Toolkit.Uwp.Notifications) for reminders and state changes.
- If toasts are not supported or fail at runtime, it falls back to classic tray
balloon tips so you still get notified.

### ⚙️ Improvements & fixes

- The tray icon now consistently uses:
- The main EyeRest icon when reminders are enabled,
- A dedicated snoozed icon when reminders are disabled,
including after state changes and when using toasts with balloon fallback.
- The reminder timer now uses a session-only ReminderIntervalMinutes value
instead of a hard-coded 20-minute interval.
- The Options dialog wording has been updated (e.g. “Enable reminders”) for
clearer behavior.
- A few internal cleanups around timer shutdown and UI marshaling improve
reliability on exit.