polish: configurator visual redesign + copy cleanup

- Redesigned progress bar: numbered circles with connectors, checkmarks on completion,
  line only fills up to current step, centered layout
- Redesigned service cards: horizontal 3-column grid, border-based selection state,
  check badges, staggered entrance animations
- Fixed card border clipping (ring → border)
- Fixed height stability (selection hint stays in DOM)
- Removed all em dashes, replaced with regular dashes
- Removed all Côte d'Azur / Riviera / France location references sitewide
- Philosophy quote attributed to "Matt Ciaccio, Founder"
- Footer: "American-founded. Serving clients worldwide."
- Email template: LetsBe Solutions LLC
- AI prompt: removed Côte d'Azur reference

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

src/app/(frontend)/api/configure/route.ts

@@ -84,7 +84,7 @@ async function generateBriefWithAI(body: ConfigureRequestBody): Promise<string>
   const context = buildContext(body);
   const displayName = body.name.split(' ')[0] || body.name;
 
-  const systemPrompt = `You are writing a project brief on behalf of LetsBe Solutions, a digital studio that builds custom websites, custom software, and private digital infrastructure. The company is American-founded and serves businesses on the Côte d'Azur and internationally.
+  const systemPrompt = `You are writing a project brief on behalf of LetsBe Solutions, a digital studio that builds custom websites, custom software, and private digital infrastructure. The company is American-founded and serves clients internationally.
 
 Key facts about LetsBe:
 - Every project is designed and coded from scratch — no templates, no page builders