feat: add Admin Control Panel, voting status check, and router security

Admin Control Panel:
- Add full AdminControl.vue with 3 sections (Voting, Lottery, Global)
- Add AdminLogin.vue with access code gate (20268888)
- Add admin.ts store with state persistence
- Add admin.types.ts with state machine types
- Add router guards for /admin/director-console

Voting System Fixes:
- Add voting status check before accepting votes (VOTING_CLOSED error)
- Fix client to display server error messages
- Fix button disabled logic to prevent ambiguity in paused state
- Auto-generate userId on connect to fix UNAUTHORIZED error

Big Screen Enhancements:
- Add LiveVotingView.vue with particle system
- Add LotteryMachine.ts with 3-stage animation (Galaxy/Storm/Reveal)
- Add useSocketClient.ts composable
- Fix MainDisplay.vue SCSS syntax error
- Add admin state sync listener in display store

Server Updates:
- Add admin.service.ts for state management
- Add isVotingOpen() and getVotingStatus() methods
- Add admin socket event handlers

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

packages/client-screen/src/views/VoteResultsView.vue

@@ -62,7 +62,7 @@ const categories = [
 </template>
 
 <style lang="scss" scoped>
-@import '../assets/styles/variables.scss';
+@use '../assets/styles/variables.scss' as *;
 
 .vote-results-view {
   width: 100%;