fix: refresh runtime settings on change

[enieuwy]

Problem

Changing "Exclude paths" or "Max text file size" in YAOS settings had no effect until the plugin was reloaded. The onChange handlers saved the raw values to disk but never updated the runtime fields (this.excludePatterns, this.maxFileSize) used by the sync engine.

Fix

• Extract refreshRuntimeSettings() on the plugin class — re-parses exclude patterns and recalculates max file size from settings
• Call it from both onChange handlers in the settings tab
• Deduplicate the onload() init to use the same method

Test plan

• tsc --noEmit passes
• Open YAOS settings, set exclude pattern to templates/, create a file in templates/ — confirm it is excluded from sync immediately (no reload needed)
• Change max file size in settings — confirm new limit applies immediately

[enieuwy]

Review follow-up pushed in 8a5c9af.

This keeps the runtime settings refresh from leaving a stale conservative-reconcile untracked queue:

• refreshRuntimeSettings() now re-filters queued untracked files against the current exclude patterns and max text size;
• importUntrackedFiles() rechecks syncability and size before reading/importing each queued file.

Verification rerun:

• npm run build
• git diff --check