Polish locale controls and quit flow

[woffko]

Summary

This updates CoMon to version 0.4.3 and completes the locale-aware UI, mouse controls, chart readability, and safe quit
flow.

Locale-aware display modes

• add the STYLE CLASS / SCOMP / SFULL mouse selector beside the Usage chart controls
• preserve the existing Classic formatting
• use regular-space digit grouping in System Full, for example 14 535 104 783
• keep full values where they fit and compact only individual vertical chart labels that exceed their bar width

Chart improvements

• show the current locale-aware date and time in the TODAY card border
• show an exact locale-aware date and value tooltip when hovering over a filled vertical chart bar
• keep dense monthly charts readable without changing the selected global display mode

System Full previously bypassed the vertical-label width check, causing oversized values to be truncated in narrow monthly
bars. Labels now fall back to compact notation only when their own bar is too narrow.

Mouse and navigation

• add clickable screen tabs for Usage, Activity, Limits, and History
• add mouse controls for metrics, timeframe, chart orientation, project count, and display style
• keep the footer as a keyboard hint instead of a clickable control
• retain compact, aligned control strips with consistent active-state styling

Quit flow

• add a bottom-right QUIT action
• show the same safe Yes/No confirmation for both QUIT and q/Q
• visually invert QUIT while its confirmation dialog is active
• add Don't show again to the exit dialog
• persist the exit-confirmation preference in state.json
• show the saved preference as [ ]/[✓] beside QUIT
• ask for confirmation before the mouse checkbox enables or disables future exit prompts
• keep Ctrl+C as the immediate exit path

Fork replay accounting fix

Forked Codex session files can contain a compressed replay of their parent session history.

The replay detector previously initialized its state from the timestamp inside the session_meta payload and immediately compared it with the outer
JSONL timestamp. When replay preparation took more than one second, that normal delay was mistaken for the end of the replay. Parent messages and
token totals were then counted again for every fork.

This change:

• initializes replay tracking from the outer JSONL timestamp
• prevents the initiating session_meta event from ending its own replay
• keeps replay timestamps monotonic if an event timestamp moves backwards
• preserves active replay state across incremental cached scans
• adds cache schema v4
• invalidates and reparses only cached forked sessions
• preserves unaffected cache rows
• avoids scanning old cache files twice during multi-version upgrades

Result

The final UI keeps the screen tabs separate from the Usage controls, places display formatting after BARS VERT / HORZ,
and makes the active style and quit state visually consistent with the existing pill controls.

Validation

• cargo fmt --all
• git diff --check
• cargo test — 71 passed
• local release installation via scripts/install-user.sh