Feat: Basic font sanity checks

scripts/validate-font.js

@@ -0,0 +1,33 @@
+import fs from "fs";
+import path from "path";
+import { fileURLToPath } from "url";
+import opentype from "opentype.js";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const fontPath = path.join(__dirname, "..", "dist", "Stain-Regular.ttf");
+
+if (!fs.existsSync(fontPath)) {
+  console.error("Font not found:", fontPath);
+  process.exit(1);
+}
+
+try {
+  const font = opentype.loadSync(fontPath);
+  if (!font.glyphs || font.glyphs.length === 0) {
+    console.error("Font has no glyphs");
+    process.exit(1);
+  }
+  const required = ["A", "B", "C", "D", "E", "F", "G"];
+  for (const ch of required) {
+    const g = font.charToGlyph(ch);
+    if (!g || !g.path || g.path.commands.length === 0) {
+      console.error("Missing or empty glyph for", ch);
+      process.exit(1);
+    }
+  }
+  console.log("Font validation passed.");
+} catch (e) {
+  console.error("Error validating font:", e);
+  process.exit(1);
+}