fix: hero copy "Fix tickets" → "Resolve tickets"

Matches MSP terminology and the product name (ResolutionFlow).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/pages/LandingPage.tsx

@@ -133,7 +133,7 @@ export default function LandingPage() {
           <section className="landing-hero">
             <div className="landing-hero-badge">Now in Beta — Join early access</div>
             <h1>
-              Fix tickets faster.<br />
+              Resolve tickets faster.<br />
               <span className="landing-gradient-text">Notes write themselves.</span>
             </h1>
             <p className="landing-hero-sub">