UX: Update Setup, Settings, and Help pages with user-friendly text

- Setup: Changed 'Add Keywords' to 'Find Keywords'
- Account Settings: Updated description to be more user-friendly
- AI Settings: Updated description to explain AI models and preferences
- General Settings: Changed to 'App Preferences' with clearer description
- Help: Changed 'Help & Documentation' to 'Help Center' with friendlier description

frontend/src/pages/Setup/IndustriesSectorsKeywords.tsx

@@ -645,9 +645,9 @@ export default function IndustriesSectorsKeywords() {
 
   return (
     <>
-      <PageMeta title="Add Keywords" description="Browse and add keywords to your workflow" />
+      <PageMeta title="Find Keywords" description="Search and add keywords to start creating content" />
       <PageHeader 
-        title="Add Keywords" 
+        title="Find Keywords" 
         badge={{ icon: <BoltIcon />, color: 'blue' }}
       />
       {/* Show info banner when no sector is selected */}