Add syntax highlighting, OSD, search, perf optimizations, and UX improvements

- troika-three-text MSDF rendering for resolution-independent code text
- highlight.js syntax highlighting with Catppuccin Mocha colors
- Lazy text pool: max 25 concurrent code meshes, created on demand
- LOD throttled to every 3 frames, OSD every 10
- 45° tiled watermark (repo/path/filename) behind code
- OSD: breadcrumb, file stats, zoom level
- Search: / or Ctrl+F to find and fly to files
- Keybindings: WASD pan, Q/E rotate, Z/C zoom, Space overview, ? help modal
- Mouse wheel zoom vs trackpad pan detection via event frequency
- Zip GBK filename encoding fallback for Chinese filenames
- Docker volume persistence for SQLite cache

web/package-lock.json

@@ -9,7 +9,9 @@
       "version": "0.1.0",
       "dependencies": {
         "d3-hierarchy": "^3.1.2",
-        "three": "^0.170.0"
+        "highlight.js": "^11.11.1",
+        "three": "^0.170.0",
+        "troika-three-text": "^0.52.4"
       },
       "devDependencies": {
         "vite": "^6.0.0"
@@ -762,6 +764,14 @@
       "integrity": "sha512-dWHzHa2WqEXI/O1E9OjrocMTKJl2mSrEolh1Iomrv6U+JuNwaHXsXx9bLu5gG7BUWFIN0skIQJQ/L1rIex4X6w==",
       "dev": true
     },
+    "node_modules/bidi-js": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/bidi-js/-/bidi-js-1.0.3.tgz",
+      "integrity": "sha512-RKshQI1R3YQ+n9YJz2QQ147P66ELpa1FQEg20Dk8oW9t2KgLbpDLLp9aGZ7y8WHSshDknG0bknqGw5/tyCs5tw==",
+      "dependencies": {
+        "require-from-string": "^2.0.2"
+      }
+    },
     "node_modules/d3-hierarchy": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/d3-hierarchy/-/d3-hierarchy-3.1.2.tgz",
@@ -842,6 +852,14 @@
         "node": "^8.16.0 || ^10.6.0 || >=11.0.0"
       }
     },
+    "node_modules/highlight.js": {
+      "version": "11.11.1",
+      "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-11.11.1.tgz",
+      "integrity": "sha512-Xwwo44whKBVCYoliBQwaPvtd/2tYFkRQtXDWj1nackaV2JPXx3L0+Jvd8/qCJ2p+ML0/XVkJ2q+Mr+UVdpJK5w==",
+      "engines": {
+        "node": ">=12.0.0"
+      }
+    },
     "node_modules/nanoid": {
       "version": "3.3.11",
       "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.11.tgz",
@@ -906,6 +924,14 @@
         "node": "^10 || ^12 || >=14"
       }
     },
+    "node_modules/require-from-string": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/require-from-string/-/require-from-string-2.0.2.tgz",
+      "integrity": "sha512-Xf0nWe6RseziFMu+Ap9biiUbmplq6S9/p+7w7YXP/JBHhrUDDUhwa+vANyubuqfZWTveU//DYVGsDG7RKL/vEw==",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/rollup": {
       "version": "4.60.1",
       "resolved": "https://registry.npmjs.org/rollup/-/rollup-4.60.1.tgz",
@@ -980,6 +1006,33 @@
         "url": "https://github.com/sponsors/SuperchupuDev"
       }
     },
+    "node_modules/troika-three-text": {
+      "version": "0.52.4",
+      "resolved": "https://registry.npmjs.org/troika-three-text/-/troika-three-text-0.52.4.tgz",
+      "integrity": "sha512-V50EwcYGruV5rUZ9F4aNsrytGdKcXKALjEtQXIOBfhVoZU9VAqZNIoGQ3TMiooVqFAbR1w15T+f+8gkzoFzawg==",
+      "dependencies": {
+        "bidi-js": "^1.0.2",
+        "troika-three-utils": "^0.52.4",
+        "troika-worker-utils": "^0.52.0",
+        "webgl-sdf-generator": "1.1.1"
+      },
+      "peerDependencies": {
+        "three": ">=0.125.0"
+      }
+    },
+    "node_modules/troika-three-utils": {
+      "version": "0.52.4",
+      "resolved": "https://registry.npmjs.org/troika-three-utils/-/troika-three-utils-0.52.4.tgz",
+      "integrity": "sha512-NORAStSVa/BDiG52Mfudk4j1FG4jC4ILutB3foPnfGbOeIs9+G5vZLa0pnmnaftZUGm4UwSoqEpWdqvC7zms3A==",
+      "peerDependencies": {
+        "three": ">=0.125.0"
+      }
+    },
+    "node_modules/troika-worker-utils": {
+      "version": "0.52.0",
+      "resolved": "https://registry.npmjs.org/troika-worker-utils/-/troika-worker-utils-0.52.0.tgz",
+      "integrity": "sha512-W1CpvTHykaPH5brv5VHLfQo9D1OYuo0cSBEUQFFT/nBUzM8iD6Lq2/tgG/f1OelbAS1WtaTPQzE5uM49egnngw=="
+    },
     "node_modules/vite": {
       "version": "6.4.2",
       "resolved": "https://registry.npmjs.org/vite/-/vite-6.4.2.tgz",
@@ -1053,6 +1106,11 @@
           "optional": true
         }
       }
+    },
+    "node_modules/webgl-sdf-generator": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/webgl-sdf-generator/-/webgl-sdf-generator-1.1.1.tgz",
+      "integrity": "sha512-9Z0JcMTFxeE+b2x1LJTdnaT8rT8aEp7MVxkNwoycNmJWwPdzoXzMh0BjJSh/AEFP+KPYZUli814h8bJZFIZ2jA=="
     }
   }
 }