feat: OpenAI compatibility improvements & build fixes

- Fix hydration mismatches and initialization errors
- Add /v1/models endpoint for OpenAI clients
- Add Codex response translator (Responses → OpenAI)
- Fix circular dependencies and PropTypes
- Add Material Symbols font and CSS fixes
- Update README with deployment guide

Co-merged from PR #18 (14/15 commits, skipped debug)

src/app/(dashboard)/dashboard/profile/page.js

@@ -159,7 +159,7 @@ export default function ProfilePage() {
             )}
 
             <div className="pt-2">
-              <Button type="submit" variant="primary" isLoading={passLoading}>
+              <Button type="submit" variant="primary" loading={passLoading}>
                 Update Password
               </Button>
             </div>