Android tablet remote UI: styling pass, color picker, arrange mode indicator, connection gating

- Button styling standardization with green ring state indicators (Connect, Rescan, Log, Clear Layout, Reset ALL)
- Input field labels with proper DP-based padding and spacing
- Feedback & title widget color picker with 7-color palette and persistence layer
- Font weight selection for text widgets (deferred visual implementation)
- Hide/Show and Reset Size buttons in context menu
- Flashing pink border around entire app when Arrange mode is ON (500ms fade in/out cycle)
- Arrange button disabled until connected to desktop app, with alpha indicator
- WidgetLayoutState now persists color and fontWeight properties
- Arrange mode visual debugging with smooth fade animation instead of harsh strobe

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

remote-client-android/app/build/intermediates/incremental/mergeDebugAssets/merger.xml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="utf-8"?>
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