Restyle to a clean, flat look and rename brand to SCOPENET

- Brand is now SCOPENET everywhere (defaults, UI, installer, docs)
- Launcher: solid backgrounds (no animated orbs/grain), flat Play button
  without gradient/shine/glow, quieter rail with a simple active
  indicator, smaller type scale, Inter as default font, glass off by
  default, restyled sliders
- Panel: same flat treatment; live preview mirrors the new launcher
- New flat scope-reticle logo and app icons
- Calmer default palette
- Fix: lock the shared cargo cache in the Docker build (amd64/arm64 raced)
- Fix: Windows-only clippy lint in sys.rs

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011ARcGWxLx21FwXJ3yfGriS

launcher/src/lib/mock.ts

@@ -39,16 +39,16 @@ const manifest: Manifest = {
   user: null,
   auth: { panel_accounts: true, registration: 'approval', microsoft: true, microsoft_client_id: 'demo', offline_local: true },
   branding: {
-    name: 'ScopeNet',
+    name: 'SCOPENET',
     tagline: 'Your worlds, one click away.',
     logo_url: null,
     icon_url: null,
-    background: { kind: 'gradient', url: null, blur: 0, dim: 45 },
-    colors: { accent: '#7c5cff', accent_2: '#22d3ee', background: '#0b0d17', surface: '#141828', text: '#eef0ff', muted: '#8b90b3', success: '#34d399', danger: '#f43f5e' },
-    font: 'Outfit',
-    radius: 14,
-    glass: true,
-    version_label: 'ScopeNet',
+    background: { kind: 'gradient', url: null, blur: 0, dim: 55 },
+    colors: { accent: '#6d6af5', accent_2: '#8b88f8', background: '#0d0e12', surface: '#16181e', text: '#ecedf1', muted: '#8b8f9a', success: '#3fb97c', danger: '#e5484d' },
+    font: 'Inter',
+    radius: 10,
+    glass: false,
+    version_label: 'SCOPENET',
     news: [
       { id: '1', title: 'Season 4 is live!', body: 'A brand new world with custom terrain, player shops and weekly events. Join now and claim your spot before the land rush.', image_url: null, link: 'https://example.com', date: '2026-09-26', pinned: true, tag: 'Update' },
       { id: '2', title: 'Build contest: Autumn Castles', body: 'Submit your best castle build on the Creative server by October 10th. Top three win VIP for a month.', image_url: null, link: null, date: '2026-09-21', pinned: false, tag: 'Event' },
@@ -63,7 +63,7 @@ const manifest: Manifest = {
     custom_css: '',
   },
   instances: [
-    { id: 'survival-smp', name: 'Survival SMP', description: 'Our main survival world — season 4. Claims, shops & weekend events.', icon_url: null, banner_url: null, mc_version: '1.21.1', loader: 'fabric', loader_version: '0.16.9', revision: 3, server: { name: 'ScopeNet SMP', address: 'play.scopenet.gg', port: 25565, auto_join: true, inject: true }, memory: { min_mb: 2048, max_mb: 6144 }, jvm_args: '', featured: true, source_label: 'Modrinth · Fabulously Optimized 6.2', file_count: 48, total_size: 184_000_000 },
+    { id: 'survival-smp', name: 'Survival SMP', description: 'Our main survival world — season 4. Claims, shops & weekend events.', icon_url: null, banner_url: null, mc_version: '1.21.1', loader: 'fabric', loader_version: '0.16.9', revision: 3, server: { name: 'SCOPENET SMP', address: 'play.scopenet.gg', port: 25565, auto_join: true, inject: true }, memory: { min_mb: 2048, max_mb: 6144 }, jvm_args: '', featured: true, source_label: 'Modrinth · Fabulously Optimized 6.2', file_count: 48, total_size: 184_000_000 },
     { id: 'creative', name: 'Creative Build', description: 'Plots, WorldEdit and weekly build contests.', icon_url: null, banner_url: null, mc_version: '1.20.1', loader: 'vanilla', loader_version: null, revision: 1, server: { name: 'Creative', address: 'creative.scopenet.gg', port: 25565, auto_join: false, inject: true }, memory: { min_mb: 1024, max_mb: 4096 }, jvm_args: '', featured: false, source_label: 'Minecraft 1.20.1', file_count: 0, total_size: 0 },
     { id: 'modded', name: 'Create: Above & Beyond', description: 'Factory building with Create and friends.', icon_url: null, banner_url: null, mc_version: '1.20.1', loader: 'forge', loader_version: '1.20.1-47.3.0', revision: 2, server: null, memory: { min_mb: 4096, max_mb: 8192 }, jvm_args: '', featured: false, source_label: 'CurseForge · Create: Above & Beyond 1.4', file_count: 212, total_size: 612_000_000 },
   ],
@@ -152,7 +152,7 @@ export async function mockInvoke(cmd: string, args: Record<string, any>): Promis
       return null;
     case 'ping_server':
       await sleep(200);
-      return { online: true, version: 'Paper 1.21.1', players_online: 42, players_max: 100, sample: ['Notch', 'jeb_', 'Dinnerbone'], motd: '§b§lScopeNet §r§7» §fSeason 4 is live!', favicon: null, latency_ms: 23 };
+      return { online: true, version: 'Paper 1.21.1', players_online: 42, players_max: 100, sample: ['Notch', 'jeb_', 'Dinnerbone'], motd: '§b§lSCOPENET §r§7» §fSeason 4 is live!', favicon: null, latency_ms: 23 };
     case 'instance_local':
       return { installed: args.instanceId !== 'modded', revision: 3, size: 1_240_000_000 };
     case 'storage_info':