Version 2.0.0: Animation fixes, timing improvements, and E2E test suite

Animation fixes:
- Fix held card positioning bug (was appearing at bottom of page)
- Fix discard pile blank/white flash on turn transitions
- Fix blank card at round end by skipping animations during round_over/game_over
- Set card content before triggering flip animation to prevent flash
- Center suit symbol on 10 cards

Timing improvements:
- Reduce post-discard delay from 700ms to 500ms
- Reduce post-swap delay from 1800ms to 1000ms
- Speed up swap flip animation from 1150ms to 550ms
- Reduce CPU initial thinking delay from 150-250ms to 80-150ms
- Pause now happens after swap completes (showing result) instead of before

E2E test suite:
- Add Playwright-based test bot that plays full games
- State parser extracts game state from DOM for validation
- AI brain ports decision logic for automated play
- Freeze detector monitors for UI hangs
- Visual validator checks CSS states
- Full game, stress, and visual test specs

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

tests/e2e/tsconfig.json

@@ -0,0 +1,32 @@
+{
+  "compilerOptions": {
+    "target": "ES2020",
+    "module": "commonjs",
+    "moduleResolution": "node",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "resolveJsonModule": true,
+    "declaration": false,
+    "declarationMap": false,
+    "sourceMap": true,
+    "outDir": "./dist",
+    "rootDir": ".",
+    "baseUrl": ".",
+    "paths": {
+      "@bot/*": ["bot/*"],
+      "@health/*": ["health/*"],
+      "@visual/*": ["visual/*"],
+      "@utils/*": ["utils/*"]
+    }
+  },
+  "include": [
+    "**/*.ts"
+  ],
+  "exclude": [
+    "node_modules",
+    "dist",
+    "playwright-report"
+  ]
+}