feat(design): Projector Noir theme - tungsten amber on film-black

Full visual refonte replacing the generic neon-blue glass look:

- palette: warm film-black surface ladder, tungsten amber primary,
  warm taupe secondary, verdigris teal tertiary; semantic and
  category colors retuned to match (coral live, gold movies)
- typography: Syne (display/headlines) + Instrument Sans (body/UI)
  replace Space Grotesk/Inter/Outfit across all screens
- glassmorphism tokens warmed (amber inner glow, warm-white borders)
- web player theme.css + index.html loader mirror the new tokens
- hardcoded Colors.blue* in streaming settings and recordings tabs
  now use AppColors tokens
- DESIGN_SYSTEM.md updated to v3.0 Projector Noir

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

web/index.html

@@ -27,7 +27,7 @@
     }
 
     body {
-      background: linear-gradient(135deg, #0F1014 0%, #181920 100%);
+      background: linear-gradient(135deg, #0B0A08 0%, #1B1812 100%);
       display: flex;
       justify-content: center;
       align-items: center;
@@ -55,7 +55,7 @@
     .logo {
       font-size: 48px;
       font-weight: 700;
-      background: linear-gradient(135deg, #007AFF 0%, #00C6FF 100%);
+      background: linear-gradient(135deg, #E8941A 0%, #FFC36A 100%);
       -webkit-background-clip: text;
       -webkit-text-fill-color: transparent;
       background-clip: text;
@@ -67,8 +67,8 @@
       width: 40px;
       height: 40px;
       margin: 0 auto 16px;
-      border: 3px solid rgba(0, 122, 255, 0.2);
-      border-top-color: #007AFF;
+      border: 3px solid rgba(243, 154, 31, 0.2);
+      border-top-color: #F39A1F;
       border-radius: 50%;
       animation: spin 1s linear infinite;
     }