refactor(core): pre-generate font assets and append via closeBundle hook

- Add scripts/generate-fonts.mjs to produce fonts.generated.css and
  copy woff2 files to src/assets/fonts/ from fontsource packages
- Remove fonts.css; globals.css no longer imports fonts directly
  (avoids Vite woff2 resolution warnings during build)
- Add appendFonts Vite plugin that appends fonts.generated.css to
  dist/app-shell.css in closeBundle hook (instant, no font generation)
- Committed generated assets so CI doesn't need to re-run generation
- Add generate:fonts script to package.json

Author: IzumiSy

packages/core/package.json

@@ -44,6 +44,7 @@
   "scripts": {
     "dev": "vite build --watch --mode development",
     "build": "vite build",
+    "generate:fonts": "node scripts/generate-fonts.mjs",
     "lint": "oxlint -c .oxlintrc.jsonc",
     "test": "vitest run",
     "type-check": "tsc --incremental"

packages/core/scripts/generate-fonts.mjs

@@ -0,0 +1,41 @@
+/**
+ * Generates self-contained font CSS from fontsource packages.
+ *
+ * - Reads @font-face declarations from @fontsource-variable/geist and inter
+ * - Copies woff2 files to src/assets/fonts/
+ * - Outputs src/assets/fonts.generated.css with rewritten url() paths
+ *
+ * Run manually: `node scripts/generate-fonts.mjs`
+ * The output is committed to the repo so CI doesn't need to re-run this.
+ */
+import { readFileSync, writeFileSync, mkdirSync, cpSync, rmSync } from "node:fs";
+import { resolve, dirname } from "node:path";
+import { createRequire } from "node:module";
+
+const require = createRequire(import.meta.url);
+const assetsDir = resolve(import.meta.dirname, "../src/assets");
+const fontsDir = resolve(assetsDir, "fonts");
+
+// Clean and recreate fonts directory
+rmSync(fontsDir, { recursive: true, force: true });
+mkdirSync(fontsDir, { recursive: true });
+
+const FONT_PACKAGES = ["@fontsource-variable/geist", "@fontsource-variable/inter"];
+
+let css = "/* Auto-generated by scripts/generate-fonts.mjs — do not edit manually. */\n\n";
+
+for (const pkg of FONT_PACKAGES) {
+  const pkgDir = dirname(require.resolve(`${pkg}/package.json`));
+  const pkgCss = readFileSync(resolve(pkgDir, "index.css"), "utf8");
+
+  // Copy woff2 files
+  cpSync(resolve(pkgDir, "files"), fontsDir, { recursive: true });
+
+  // Rewrite url(./files/...) → url(./fonts/...)
+  css += pkgCss.replace(/url\(\.\/files\//g, "url(./fonts/") + "\n";
+}
+
+writeFileSync(resolve(assetsDir, "fonts.generated.css"), css);
+
+console.log("✓ src/assets/fonts.generated.css generated");
+console.log(`✓ woff2 files copied to src/assets/fonts/`);

packages/core/src/assets/fonts.css

@@ -0,0 +1,134 @@
+/* Auto-generated by scripts/generate-fonts.mjs — do not edit manually. */
+
+/* geist-cyrillic-ext-wght-normal */
+@font-face {
+  font-family: "Geist Variable";
+  font-style: normal;
+  font-display: swap;
+  font-weight: 100 900;
+  src: url(./fonts/geist-cyrillic-ext-wght-normal.woff2) format("woff2-variations");
+  unicode-range: U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;
+}
+
+/* geist-cyrillic-wght-normal */
+@font-face {
+  font-family: "Geist Variable";
+  font-style: normal;
+  font-display: swap;
+  font-weight: 100 900;
+  src: url(./fonts/geist-cyrillic-wght-normal.woff2) format("woff2-variations");
+  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
+}
+
+/* geist-vietnamese-wght-normal */
+@font-face {
+  font-family: "Geist Variable";
+  font-style: normal;
+  font-display: swap;
+  font-weight: 100 900;
+  src: url(./fonts/geist-vietnamese-wght-normal.woff2) format("woff2-variations");
+  unicode-range:
+    U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301,
+    U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
+}
+
+/* geist-latin-ext-wght-normal */
+@font-face {
+  font-family: "Geist Variable";
+  font-style: normal;
+  font-display: swap;
+  font-weight: 100 900;
+  src: url(./fonts/geist-latin-ext-wght-normal.woff2) format("woff2-variations");
+  unicode-range:
+    U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329,
+    U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F,
+    U+A720-A7FF;
+}
+
+/* geist-latin-wght-normal */
+@font-face {
+  font-family: "Geist Variable";
+  font-style: normal;
+  font-display: swap;
+  font-weight: 100 900;
+  src: url(./fonts/geist-latin-wght-normal.woff2) format("woff2-variations");
+  unicode-range:
+    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
+    U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
+}
+/* inter-cyrillic-ext-wght-normal */
+@font-face {
+  font-family: "Inter Variable";
+  font-style: normal;
+  font-display: swap;
+  font-weight: 100 900;
+  src: url(./fonts/inter-cyrillic-ext-wght-normal.woff2) format("woff2-variations");
+  unicode-range: U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;
+}
+
+/* inter-cyrillic-wght-normal */
+@font-face {
+  font-family: "Inter Variable";
+  font-style: normal;
+  font-display: swap;
+  font-weight: 100 900;
+  src: url(./fonts/inter-cyrillic-wght-normal.woff2) format("woff2-variations");
+  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
+}
+
+/* inter-greek-ext-wght-normal */
+@font-face {
+  font-family: "Inter Variable";
+  font-style: normal;
+  font-display: swap;
+  font-weight: 100 900;
+  src: url(./fonts/inter-greek-ext-wght-normal.woff2) format("woff2-variations");
+  unicode-range: U+1F00-1FFF;
+}
+
+/* inter-greek-wght-normal */
+@font-face {
+  font-family: "Inter Variable";
+  font-style: normal;
+  font-display: swap;
+  font-weight: 100 900;
+  src: url(./fonts/inter-greek-wght-normal.woff2) format("woff2-variations");
+  unicode-range: U+0370-0377, U+037A-037F, U+0384-038A, U+038C, U+038E-03A1, U+03A3-03FF;
+}
+
+/* inter-vietnamese-wght-normal */
+@font-face {
+  font-family: "Inter Variable";
+  font-style: normal;
+  font-display: swap;
+  font-weight: 100 900;
+  src: url(./fonts/inter-vietnamese-wght-normal.woff2) format("woff2-variations");
+  unicode-range:
+    U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301,
+    U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
+}
+
+/* inter-latin-ext-wght-normal */
+@font-face {
+  font-family: "Inter Variable";
+  font-style: normal;
+  font-display: swap;
+  font-weight: 100 900;
+  src: url(./fonts/inter-latin-ext-wght-normal.woff2) format("woff2-variations");
+  unicode-range:
+    U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329,
+    U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F,
+    U+A720-A7FF;
+}
+
+/* inter-latin-wght-normal */
+@font-face {
+  font-family: "Inter Variable";
+  font-style: normal;
+  font-display: swap;
+  font-weight: 100 900;
+  src: url(./fonts/inter-latin-wght-normal.woff2) format("woff2-variations");
+  unicode-range:
+    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
+    U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
+}