Improve corruption/maulwurf target selection and dice flow with UI highlights

[CosmicSlothOracle]

Motivation

• Fix broken corruption flow where Maulwurf and corruption rolls were not wired to board clicks and the dice, causing no visual feedback or resolution when a player rolled.
• Provide clear UI feedback which card is being targeted and show success/fail animations so players can see outcomes of corruption attempts.

Description

• App wiring: added refs and event listeners in src/App.tsx to track pending abilities and selected target UIDs, listen for pc:corruption_target_selected / pc:maulwurf_select_target and forward pc:dice_result to the engine via pc:corruption_request_roll or pc:maulwurf_request_roll as appropriate.
• Click handling: updated handleCardClick in src/App.tsx to allow clicking opponent government cards while a corruption ability is active, dispatch target selection events, and mark a target for a subsequent roll.
• GameBoard UI: added corruptionTargetUid state and listeners in src/components/GameBoard.tsx, extended renderCard to add success/fail CSS classes (game-board__card--corruption-success / game-board__card--corruption-fail), and refined slot/card highlight logic so the board highlights selectable targets, the currently selected target, and shows outcome animations on resolution.
• Small UX fixes: maintain and clear pending selection state on pc:clear_pending_selection / pc:corruption_resolved events and ensure Maulwurf auto-targeting is treated the same for UI highlighting.

Testing

• Ran npm run build and the production build completed successfully (compiled successfully, build output generated). — Success.
• Started the development server with BROWSER=none npm start and verified the app compiles and serves the UI (webpack compiled successfully). — Success.
• Captured a visual smoke test screenshot by opening the running app with Playwright to verify corruption UI state and highlights render. — Success.

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Codex Task

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