redesign notify system

[KHeresy]

• feat: Add persisted notification modes for original web notifications or Messenger-only app notifications
• feat: Detect new messages through conversation changes, with unread badges and page titles as fallback signals
• feat: Add optional message previews and a persistent Windows taskbar unread indicator with manual clearing
• fix: Deduplicate signals for the same message while allowing later new messages to notify again
• build: Bump Electron to 44.4.5

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Reset unread baselines on navigation

did-start-navigation supplies positional arguments (event, url, isInPlace, isMainFrame, ...), so details is the event object and has neither isMainFrame nor isSameDocument; this reset branch therefore never runs. After a full navigation or redirect, the initial unread badge on the newly loaded Messenger page is compared with the previous page's count instead of being baselined during the intended five-second grace period, which can produce a background notification for already-existing unread messages.

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