Syntax highlighting improvements

- Fix cli-highlight import (use static import instead of dynamic require)
- Add syntax highlighting to read/write tool output
- Update dark/light themes with VS Code default syntax colors
- Add highlightCode and getLanguageFromPath exports
- Upgrade @google/genai to 1.34.0 for IMAGE_RECITATION/IMAGE_OTHER FinishReason
- Add AGENTS.md rule: never downgrade code to fix type errors from outdated deps

package-lock.json

@@ -675,9 +675,9 @@
 			}
 		},
 		"node_modules/@google/genai": {
-			"version": "1.31.0",
-			"resolved": "https://registry.npmjs.org/@google/genai/-/genai-1.31.0.tgz",
-			"integrity": "sha512-rK0RKXxNkbK35eDl+G651SxtxwHNEOogjyeZJUJe+Ed4yxu3xy5ufCiU0+QLT7xo4M9Spey8OAYfD8LPRlYBKw==",
+			"version": "1.34.0",
+			"resolved": "https://registry.npmjs.org/@google/genai/-/genai-1.34.0.tgz",
+			"integrity": "sha512-vu53UMPvjmb7PGzlYu6Tzxso8Dfhn+a7eQFaS2uNemVtDZKwzSpJ5+ikqBbXplF7RGB1STcVDqCkPvquiwb2sw==",
 			"license": "Apache-2.0",
 			"dependencies": {
 				"google-auth-library": "^10.3.0",
@@ -687,7 +687,7 @@
 				"node": ">=20.0.0"
 			},
 			"peerDependencies": {
-				"@modelcontextprotocol/sdk": "^1.20.1"
+				"@modelcontextprotocol/sdk": "^1.24.0"
 			},
 			"peerDependenciesMeta": {
 				"@modelcontextprotocol/sdk": {
@@ -6424,7 +6424,7 @@
 			"license": "MIT",
 			"dependencies": {
 				"@anthropic-ai/sdk": "0.71.2",
-				"@google/genai": "1.31.0",
+				"@google/genai": "^1.34.0",
 				"@mistralai/mistralai": "1.10.0",
 				"@sinclair/typebox": "^0.34.41",
 				"ajv": "^8.17.1",