chore(deps-dev): bump ai from 5.0.76 to 6.0.0-beta.99

Bumps [ai](https://github.com/vercel/ai) from 5.0.76 to 6.0.0-beta.99.
- [Release notes](https://github.com/vercel/ai/releases)
- [Changelog](https://github.com/vercel/ai/blob/main/CHANGELOG.md)
- [Commits](https://github.com/vercel/ai/compare/[email protected]@6.0.0-beta.99)

---
updated-dependencies:
- dependency-name: ai
  dependency-version: 6.0.0-beta.99
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

apps/content/package.json

@@ -39,7 +39,7 @@
     "@tanstack/svelte-query": "^6.0.8",
     "@tanstack/vue-query": "^5.91.2",
     "@types/node": "^22.15.30",
-    "ai": "5.0.76",
+    "ai": "6.0.0-beta.99",
     "markdown-it-task-lists": "^2.1.1",
     "mermaid": "^11.12.1",
     "openai": "^6.9.1",

packages/ai-sdk/package.json

@@ -43,7 +43,7 @@
     "@orpc/shared": "workspace:*"
   },
   "devDependencies": {
-    "ai": "6.0.0-beta.85",
+    "ai": "6.0.0-beta.99",
     "zod": "^4.1.12"
   }
 }