feat: responsive design, deployment config, and lint fixes

[mayasimi]

close #29
Responsiveness:

• Remove double LayoutWrapper from all pages (root layout already wraps)
• Fix profile/page.tsx and submit/page.tsx missing layout structure
• Add hide-scrollbar utility to globals.css (used in discover page)
• Sync Navbar mobile menu to include all 5 nav links (Reviews, Verify)
• Fix all pages to use consistent pt-8 pb-24 spacing

Deployment:

• Configure next.config.ts: reactStrictMode, compress, image domains, security headers (X-Frame-Options, CSP, Referrer-Policy, etc.)
• Add ProjectRegistrationParams interface to soroban.service.ts

Lint fixes (0 errors, 0 warnings):

• admin/page.tsx: replace useEffect+setState with derived isAdmin value
• reviews/page.tsx: lazy useState initializer instead of useEffect
• discover/page.tsx: replace useEffect pagination reset with page state and filter-aware setter helpers
• VerificationStatus.tsx: IIFE pattern for async effect, lazy init state
• useStellarAccount.ts: IIFE pattern for async effect
• wallet.context.tsx: move disconnectWallet before polling effect, add to dependency array
• ReviewForm.tsx: remove unused prop destructuring
• ProjectForm.tsx: remove unused projectId from destructuring

Build: all 10 routes compile (9 static, 1 dynamic)
Tests: 27/27 passing

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