fix: skip-list featureManagement.ts in strict typecheck

Reverts the previous narrow @growthbook type shim — it was incomplete
(GrowthBookProvider.tsx imports `Context` and `GrowthBookContextValue`
which weren't covered) and was breaking the Next.js full typecheck during
build. Following the existing pattern, add featureManagement.ts to the
strictSkipList alongside the Customize-new-tab and Copy-audit entries
with a comment explaining the bundler-resolution / `exports`-map root
cause so it can be addressed in a dedicated cleanup PR.

Author: davidercruz

.claude/scheduled_tasks.lock

@@ -0,0 +1 @@
+{"sessionId":"6d012578-9e09-4611-90bf-42657912622d","pid":93274,"procStart":"Tue May  5 16:55:29 2026","acquiredAt":1778017698407}

packages/webapp/custom.d.ts

@@ -4,53 +4,3 @@ declare module '*.svg' {
   const value: SvgrComponent;
   export default value;
 }
-
-// `@growthbook/growthbook(-react)` ship .d.ts files in their `dist/` folders,
-// but their package.json `exports` map only lists "require"/"import" — under
-// `moduleResolution: "bundler"` TypeScript respects `exports` and can no
-// longer reach the typings. Declare the subset we actually consume so type
-// imports keep resolving without falling back to `any`.
-declare module '@growthbook/growthbook' {
-  export type JSONValue =
-    | null
-    | number
-    | string
-    | boolean
-    | Array<JSONValue>
-    | { [key: string]: JSONValue };
-  export type WidenPrimitives<T> = T extends string
-    ? string
-    : T extends number
-    ? number
-    : T extends boolean
-    ? boolean
-    : T;
-  export interface FeatureDefinition<T = unknown> {
-    defaultValue?: T;
-    rules?: unknown[];
-  }
-  export type Experiment = Record<string, unknown>;
-  export type Result = Record<string, unknown>;
-  export interface GrowthBook {
-    [key: string]: unknown;
-  }
-  export const GrowthBook: {
-    new (options?: unknown): GrowthBook;
-  };
-}
-
-declare module '@growthbook/growthbook-react' {
-  export interface GrowthBook {
-    [key: string]: unknown;
-  }
-  export const GrowthBook: {
-    new (options?: unknown): GrowthBook;
-  };
-  export const GrowthBookProvider: React.FC<{
-    children?: React.ReactNode;
-    growthbook?: GrowthBook;
-  }>;
-  export function useFeatureValue<T>(key: string, fallback: T): T;
-  export function useGrowthBook(): GrowthBook | undefined;
-  export function useFeatureIsOn(key: string): boolean;
-}

scripts/typecheck-strict-changed.js

@@ -58,6 +58,11 @@ const strictSkipList = new Set([
   // string handling / null returns) and should be addressed separately.
   'packages/extension/src/newtab/DndModal.tsx',
   'packages/webapp/pages/jobs/[id]/questions.tsx',
+  // featureManagement re-imports `@growthbook/growthbook` types, but
+  // moduleResolution: "bundler" (PR #5952) respects the package's `exports`
+  // map which omits a "types" condition, so type imports fall back to
+  // implicit any under strict mode. Touched here to add the personas flag.
+  'packages/shared/src/lib/featureManagement.ts',
 ]);
 
 const changedFiles = getChangedTypescriptFiles().filter(