chore(deps): upgrade AI SDK family to v4/v7 (supersedes #255, #249, #253, #250)

CHANGELOG.md

@@ -75,6 +75,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- **AI SDK family upgraded to v4/v7** (`ai` 6→7, `@ai-sdk/google`/`@ai-sdk/openai`/`@ai-sdk/react` 3→4).
+  Bumped as one coordinated unit rather than merging the four Dependabot PRs individually — `@ai-sdk/google@4`
+  emits the new `LanguageModelV4` spec, which the `ai` package's `LanguageModel` type only recognizes from
+  v7 onward, so upgrading `@ai-sdk/google` alone (as Dependabot's #255 proposed) left
+  `services/ai/providerFactory.ts` with a real `tsc` error. No application code changes were needed beyond
+  the version bump — `streamText`/`toTextStreamResponse`/`onFinish`'s `usage` shape in
+  `services/ai/worldScriptCompletionFetch.ts` and `createLanguageModelForWorldScript`'s `LanguageModel`
+  return type in `services/ai/providerFactory.ts` are unaffected. Verified with `pnpm run typecheck`,
+  `pnpm run lint`, and the full AI-provider/completion-fetch test suites (all passing).
+
 - **Settings hygiene.** Removed stale Experimental-category search hints (`plot board`, `codex`,
   `cross project` — retired/promoted flags) in favor of current features; `ProForgeDashboard` now
   uses the catalog-driven `MaturityBadge` instead of a hard-coded Experimental pill, keeping the

package.json

@@ -96,9 +96,9 @@
     "deploy:cloudflare": "node scripts/cf-pages-deploy.mjs"
   },
   "dependencies": {
-    "@ai-sdk/google": "^3.0.82",
-    "@ai-sdk/openai": "^3.0.71",
-    "@ai-sdk/react": "^3.0.201",
+    "@ai-sdk/google": "^4.0.18",
+    "@ai-sdk/openai": "^4.0.16",
+    "@ai-sdk/react": "^4.0.34",
     "@dnd-kit/core": "^6.3.1",
     "@dnd-kit/sortable": "^10.0.0",
     "@dnd-kit/utilities": "^3.2.2",
@@ -124,7 +124,7 @@
     "@tauri-apps/plugin-shell": "^2.3.5",
     "@tauri-apps/plugin-updater": "^2.10.1",
     "@xstate/react": "^6.1.0",
-    "ai": "^6.0.206",
+    "ai": "^7.0.31",
     "diff-match-patch": "^1.0.5",
     "docx": "^9.7.1",
     "dompurify": "^3.4.6",