Add initial VibeGuard browser extension

vite.config.ts

@@ -0,0 +1,54 @@
+import { defineConfig, type Plugin } from "vite";
+import { readFileSync } from "node:fs";
+
+export default defineConfig(({ mode }) => ({
+  plugins: [manifestPlugin(mode)],
+  build: {
+    outDir: `dist/${mode}`,
+    // Background scripts and content scripts are classic scripts in Manifest V2.
+    // They are rebuilt individually below as self-contained IIFEs, after the
+    // regular ESM build has produced the worker and HTML-page bundles.
+    emptyOutDir: !process.env.VIBEGUARD_CLASSIC_ENTRY,
+    rollupOptions: {
+      input: inputsFor(mode),
+      output: {
+        entryFileNames: "[name].js",
+        chunkFileNames: "chunks/[name]-[hash].js",
+        assetFileNames: "assets/[name]-[hash][extname]",
+        format: process.env.VIBEGUARD_CLASSIC_ENTRY ? "iife" : "es",
+        inlineDynamicImports: Boolean(process.env.VIBEGUARD_CLASSIC_ENTRY)
+      }
+    }
+  },
+  test: {
+    environment: "jsdom",
+    globals: true,
+    include: ["tests/**/*.test.ts"]
+  }
+}));
+
+function inputsFor(mode: string): Record<string, string> {
+  const classicEntry = process.env.VIBEGUARD_CLASSIC_ENTRY;
+  if (classicEntry === "content") return { content: "src/content/main.ts" };
+  if (classicEntry === "background") {
+    return { background: mode === "firefox" ? "src/background/firefox.ts" : "src/background/chromium.ts" };
+  }
+
+  return {
+    content: "src/content/main.ts",
+    background: mode === "firefox" ? "src/background/firefox.ts" : "src/background/chromium.ts",
+    inference: "src/inference/worker.ts",
+    options: "src/options/main.ts",
+    offscreen: "src/background/offscreen.ts"
+  };
+}
+
+function manifestPlugin(mode: string): Plugin {
+  return {
+    name: "vibeguard-manifest",
+    generateBundle() {
+      const filename = mode === "firefox" ? "public/manifest.firefox.json" : "public/manifest.chromium.json";
+      this.emitFile({ type: "asset", fileName: "manifest.json", source: readFileSync(filename, "utf8") });
+    }
+  };
+}