v0.3.11

fix(gui): restore visible layout — roll back aggressive theme overrides

v0.3.10 set TFrame + TLabelFrame backgrounds globally and zeroed the
labelframe border; on Windows vista/clam this hid the LabelFrame boxes,
so after opening the tray's "Deschide setări bridge" the user saw only
the title "360booking" with no Stare / Detalii / Acțiuni cards.

This revert keeps the critical v0.3.10 fixes:
  - tray -> subprocess launch of the GUI (Tk main-thread rule)
  - config reload on every WS reconnect + per-job
  - --gui CLI arg
And keeps a light visual polish:
  - Accent.TButton = indigo brand (#4f46e5) with white text
  - Danger.TButton = red text for destructive actions
  - Tighter typography (Segoe UI, slightly larger headings)
But stops fighting the native frame theme, so LabelFrames render again.
Size returns to 680×640 (the 720×720 experiment needed the new layout).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>