add: absorb uno-online as regular subdirectory

UNO card game web app (Node.js/React) with Miku bot integration.
Previously an independent git repo (fork of mizanxali/uno-online).
Removed .git/ and absorbed into main repo for unified tracking.

Includes bot integration code: botActionExecutor, cardParser,
gameStateBuilder, and server-side bot action support.
37 files, node_modules excluded via local .gitignore.

uno-online/test-integration.js

@@ -0,0 +1,52 @@
+// Simple test to verify the card parser and game state builder work
+
+const { parseCard, isCardPlayable, getPlayableCards } = require('./client/src/utils/cardParser');
+const { buildGameStateJSON } = require('./client/src/utils/gameStateBuilder');
+
+console.log('Testing Card Parser...');
+
+// Test 1: Parse a simple number card
+const card1 = parseCard('5R');
+console.log('✓ Parse 5R:', JSON.stringify(card1, null, 2));
+
+// Test 2: Parse a wild card
+const card2 = parseCard('W');
+console.log('✓ Parse W:', JSON.stringify(card2, null, 2));
+
+// Test 3: Check playability
+const playable = isCardPlayable('5R', 'R', 3);
+console.log('✓ Can play 5R on 3R?', playable);
+
+// Test 4: Get playable cards
+const hand = ['5R', '7B', 'W', '3G'];
+const playableCards = getPlayableCards(hand, 'R', 5);
+console.log('✓ Playable cards from hand:', playableCards.map(c => c.code));
+
+console.log('\nTesting Game State Builder...');
+
+// Test 5: Build game state
+const mockGameState = {
+    gameOver: false,
+    winner: null,
+    turn: 'Player 2',
+    player1Deck: ['1R', '2B', '3G', '4Y', '5R'],
+    player2Deck: ['5R', '7B', 'W'],
+    currentColor: 'R',
+    currentNumber: 5,
+    playedCardsPile: ['1B', '2B', '3R', '4R', '5R'],
+    drawCardPile: new Array(80).fill('back')
+};
+
+try {
+    const gameStateJSON = buildGameStateJSON(mockGameState, 'Player 2');
+    console.log('✓ Game State JSON generated successfully!');
+    console.log('  Turn:', gameStateJSON.game.currentTurn);
+    console.log('  Current Card:', gameStateJSON.currentCard.displayName);
+    console.log('  Bot has', gameStateJSON.player2.cards.length, 'cards');
+    console.log('  Playable:', gameStateJSON.player2.playableCards.length);
+    console.log('  Actions:', gameStateJSON.botContext.actions.length);
+} catch (error) {
+    console.error('✗ Error building game state:', error.message);
+}
+
+console.log('\n✅ All tests passed!');