Menu customization: add a 'Select & Insert' reorder mode

[enaboapps]

Summary

The menu customization screen has two reorder modes today: Drag (drag-handle + reorderable lazy list) and Arrows (per-row up/down IconButtons). Drag is unusable with a switch. Arrows works but moves one position per tap — moving an item from position 1 to position 12 takes 11 taps (and 11 switch-scan passes).

Add a third mode, Select, that lets a user pick an item once and pick its destination once. Two taps to move any item to any position, regardless of distance. Switch users get a dramatically better experience; everyone else gets a faster alternative for long jumps.

Approach

UI shell over the existing MenuCustomizationScreenModel.moveItem(from, to) primitive — no database, repository, or data-flow changes.

• New ReorderMode.SELECT + third segmented-button entry in the existing ReorderModeToggle
• New SelectReorderableList composable using the shared MenuItemRow:
  • The left-slot button is "Move" when nothing is selected, "Cancel" on the selected row, and "Insert above" on every other row
  • A pinned "Insert at end" row appears while a selection is active
  • Visibility eye / delete buttons are hidden during placement so each row is a single-purpose tap target
• View-model adds selectedItemId state + 4 helpers (selectForMove, insertSelectedBefore, insertSelectedAtEnd, cancelSelection); all delegate to the existing moveItem
• 6 new strings; no telemetry; no data-layer changes

Acceptance criteria

• Third Select mode appears in the reorder-mode toggle
• Picking an item highlights it, swaps row chrome to insertion targets, and shows an "Insert at end" row
• Choosing an insertion point moves the item via the existing moveItem(from, to) and clears the selection
• Cancel button and mode-switch both clear the selection
• Drag and Arrows modes are unchanged; visibility toggle still works in all three modes
• ./gradlew compileDebugKotlin testDebugUnitTest passes
• Manual switch-scan smoke test: each row is a single scan stop with the Move/Cancel/Insert-above button as its primary action