feat: complete UI/UX overhaul with Impeccable design system

Replace Inter/Baskerville with self-hosted Manrope/Alegreya/JetBrains Mono
variable fonts. Migrate all colors from hex to OKLCH tokens (30+ CSS custom
properties) with full dark/light mode support. Replace Unicode emoji with
lucide-react SVG icons throughout. Convert all page layouts to inline styles
(Tailwind CSS 4 flex/grid classes unreliable in this project). Code-split
routes via React.lazy (760KB → 15KB initial shell + 10 lazy chunks).

Add global styles: scrollbar theming, selection color, input/button bases,
:focus-visible ring, prefers-reduced-motion. Setup wizard gets 4-phase
indicator with numbered circles, PathInput and StatusDot components.
Toast container gets aria-live="polite". Tab close buttons changed to
proper <button> elements with aria-labels.

All 8 pages (Dashboard, Editor, Build, Server, Toolset, Repos, Settings,
Setup) rewritten with consistent card/section/button patterns.

package-lock.json

@@ -743,6 +743,33 @@
         "node": ">=18"
       }
     },
+    "node_modules/@fontsource-variable/alegreya": {
+      "version": "5.2.8",
+      "resolved": "https://registry.npmjs.org/@fontsource-variable/alegreya/-/alegreya-5.2.8.tgz",
+      "integrity": "sha512-gQcIA7j76KYTOcdkfo1Xee9xLBi5mya4qTkzlgeoHf9SjOL/gJj5GSSOg/7ba/ciUU18K92i7VGxXzFhDsowGg==",
+      "license": "OFL-1.1",
+      "funding": {
+        "url": "https://github.com/sponsors/ayuhito"
+      }
+    },
+    "node_modules/@fontsource-variable/jetbrains-mono": {
+      "version": "5.2.8",
+      "resolved": "https://registry.npmjs.org/@fontsource-variable/jetbrains-mono/-/jetbrains-mono-5.2.8.tgz",
+      "integrity": "sha512-WBA9elru6Jdp5df2mES55wuOO0WIrn3kpXnI4+W2ek5u3ZgLS9XS4gmIlcQhiZOWEKl95meYdvK7xI+ETLCq/Q==",
+      "license": "OFL-1.1",
+      "funding": {
+        "url": "https://github.com/sponsors/ayuhito"
+      }
+    },
+    "node_modules/@fontsource-variable/manrope": {
+      "version": "5.2.8",
+      "resolved": "https://registry.npmjs.org/@fontsource-variable/manrope/-/manrope-5.2.8.tgz",
+      "integrity": "sha512-nc9lOuCRz73UHnovDE2bwXUdghE2SEOc7Aii0qGe3CLyE03W1a7VnY5Z6euRiapiKbCkGS+eXbY3s/kvWeGeSw==",
+      "license": "OFL-1.1",
+      "funding": {
+        "url": "https://github.com/sponsors/ayuhito"
+      }
+    },
     "node_modules/@grpc/grpc-js": {
       "version": "1.14.3",
       "resolved": "https://registry.npmjs.org/@grpc/grpc-js/-/grpc-js-1.14.3.tgz",
@@ -2922,6 +2949,15 @@
         "yallist": "^3.0.2"
       }
     },
+    "node_modules/lucide-react": {
+      "version": "1.8.0",
+      "resolved": "https://registry.npmjs.org/lucide-react/-/lucide-react-1.8.0.tgz",
+      "integrity": "sha512-WuvlsjngSk7TnTBJ1hsCy3ql9V9VOdcPkd3PKcSmM34vJD8KG6molxz7m7zbYFgICwsanQWmJ13JlYs4Zp7Arw==",
+      "license": "ISC",
+      "peerDependencies": {
+        "react": "^16.5.1 || ^17.0.0 || ^18.0.0 || ^19.0.0"
+      }
+    },
     "node_modules/magic-string": {
       "version": "0.30.21",
       "resolved": "https://registry.npmjs.org/magic-string/-/magic-string-0.30.21.tgz",
@@ -4896,9 +4932,13 @@
       "name": "@layonara-forge/frontend",
       "version": "0.0.1",
       "dependencies": {
+        "@fontsource-variable/alegreya": "^5.2.8",
+        "@fontsource-variable/jetbrains-mono": "^5.2.8",
+        "@fontsource-variable/manrope": "^5.2.8",
         "@monaco-editor/react": "^4.7.0",
         "@xterm/addon-fit": "^0.11.0",
         "@xterm/xterm": "^6.0.0",
+        "lucide-react": "^1.8.0",
         "monaco-editor": "^0.55.1",
         "react": "^19.0.0",
         "react-dom": "^19.0.0",