Implement AI consent gating, user preference settings, and Ko-fi hint

client/src/services/userPreferences.test.ts

@@ -6,7 +6,9 @@ import {
   getThemePreference,
   setColorSchemePreference,
   setOwmApiKey,
-  setThemePreference
+  setThemePreference,
+  getAiAuthorized,
+  setAiAuthorized
 } from './userPreferences.js'
 
 const USER_ID = 'test-user-123'
@@ -58,4 +60,13 @@ describe('userPreferences', () => {
     expect(getThemePreference(USER_ID)).toBe('ocean')
     expect(getColorSchemePreference(USER_ID)).toBe('light')
   })
+
+  it('stores AI authorization preference per user', () => {
+    localStorage.setItem('active_userid', USER_ID)
+    expect(getAiAuthorized()).toBe(false)
+    setAiAuthorized(USER_ID, true)
+    expect(getAiAuthorized()).toBe(true)
+    expect(getAiAuthorized(USER_ID)).toBe(true)
+    expect(getAiAuthorized('other-user')).toBe(false)
+  })
 })

client/src/services/userPreferences.ts

@@ -89,3 +89,20 @@ export function setOwmApiKey(userId: string, value: string): void {
     localStorage.removeItem(owmKey(userId))
   }
 }
+
+function aiAuthorizedKey(userId: string): string {
+  return `user_pref_ai_authorized_${userId}`
+}
+
+export function getAiAuthorized(userId?: string | null): boolean {
+  const id = resolveUserId(userId)
+  if (id) {
+    return localStorage.getItem(aiAuthorizedKey(id)) === 'true'
+  }
+  return false
+}
+
+export function setAiAuthorized(userId: string, value: boolean): void {
+  localStorage.setItem(aiAuthorizedKey(userId), String(value))
+}
+