Performance Optimization and Activity History Feature

[mx57]

This update focuses on both performance optimization and feature completeness.

1. Performance (Data Layer): Introduced update_stats_batch in DataStore to perform all statistics updates (bonding points, KPS, clicks, etc.) in a single SQLite transaction. This significantly reduces I/O overhead during the flush_all process in InputManager.

2. Feature (Activity History): Upgraded the StatsDialog to a tabbed interface.

   • Tab 1 (Progress): Displays current stats, level progress, and achievements.
   • Tab 2 (History): Shows a chronological list of recent activities (app starts, feedings, level ups, achievements, and Pomodoro sessions) fetched from the activity_log table.

3. Logging: Added descriptive log_event calls in InputManager and TrayMenu to populate the activity history with meaningful data.

Tested with unittest and verified visually via offscreen rendering screenshots for both "Progress" and "History" tabs.

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PR created automatically by Jules for task 2718385397371333976 started by @mx57

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