fix(l2): quick panel stalled and tore when pulled; GPS sky plot cut off

The panel froze and dimmed the screen as the finger started: a snapshot of
the whole screen (slow on the map) and a full-screen flush, so it stalled,
jumped and tore top to bottom. Now it slides opaque over the live screen
(a clear layer under it still takes the tap that closes it), built at start.
Its slide is timed by its own frames, at most 30 ms a frame: a slow frame
ended the 160 ms lv_anim and the panel just appeared.

The sky plot on GPS > Sky was a fixed 168 px, taller than what is left
under the title bar and tabs: now it takes that height.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

examples/companion_radio/ui-lvgl/UITask.cpp

@@ -182,6 +182,7 @@ void UITask::begin(DisplayDriver* display_drv, SensorManager* sensors, NodePrefs
   lv_display_add_event_cb(lv_display_get_default(), [](lv_event_t*) { rowsFitPending(); }, LV_EVENT_REFR_START, NULL);
 
   buildStatusBar();
+  quickPanelBuild();   // QuickPanel.h: ready before the first pull
   applyDisplayPrefs();   // a slider percentage overrides the level main.cpp set
   { char c[24]; lvport::crashSummary(c, sizeof(c)); }   // the dump in flash read now (~45 ms), not on the first Diagnostics
   showHome();