Add Vite configuration and shared build config

client/build-config.shared.js

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+/**
+ * Shared build configuration for both webpack and vite
+ * Single source of truth for legacy module resolution
+ */
+import path from "path";
+import { fileURLToPath } from "url";
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const scriptsBase = path.join(__dirname, "src");
+const libsBase = path.join(scriptsBase, "libs");
+const styleBase = path.join(scriptsBase, "style");
+
+// Legacy exact-match aliases (webpack uses $ suffix, we store without it)
+export const legacyAliases = {
+    // Core libraries
+    jquery: path.join(libsBase, "jquery.custom.js"),
+    jqueryVendor: path.join(libsBase, "jquery/jquery.js"),
+    storemodern: path.join(__dirname, "node_modules/store/dist/store.modern.js"),
+
+    // Vue
+    vue: path.join(__dirname, "node_modules/vue/dist/vue.esm.js"),
+
+    // Build config
+    config: path.join(scriptsBase, "config", process.env.NODE_ENV || "development") + ".js",
+    app: path.join(scriptsBase, "app.js"),
+};
+
+// Module resolution paths (webpack's resolve.modules)
+export const modulePaths = [scriptsBase, "node_modules", styleBase];
+
+// File extensions for resolution
+export const extensions = [".ts", ".js", ".json", ".vue", ".scss"];
+
+/**
+ * Convert to webpack format (adds $ suffix for exact matches)
+ */
+export function getWebpackAliases() {
+    const aliases = { ...legacyAliases };
+
+    // Add $ suffix for exact matches
+    const webpackAliases = {};
+    for (const [key, value] of Object.entries(aliases)) {
+        webpackAliases[key + "$"] = value;
+    }
+
+    // Add non-exact aliases
+    webpackAliases["@"] = scriptsBase;
+
+    return webpackAliases;
+}
+
+/**
+ * Convert to vite format (uses regex patterns)
+ */
+export function getViteAliases() {
+    const viteAliases = [
+        // @ alias
+        { find: "@", replacement: scriptsBase },
+    ];
+
+    // Add exact match patterns
+    for (const [key, value] of Object.entries(legacyAliases)) {
+        // Skip jquery in dev mode - handled by plugin
+        if (key === "jquery" && process.env.NODE_ENV === "development") {
+            continue;
+        }
+
+        viteAliases.push({
+            find: new RegExp(`^${key}$`),
+            replacement: path.isAbsolute(value) ? value : path.join(__dirname, value),
+        });
+    }
+
+    // Add prefix patterns for legacy paths
+    viteAliases.push(
+        { find: /^libs\//, replacement: libsBase + "/" },
+        { find: /^ui\//, replacement: path.join(scriptsBase, "ui") + "/" }
+    );
+
+    return viteAliases;
+}

client/vite.config.mjs

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+import { defineConfig } from "vite";
+import vue from "@vitejs/plugin-vue2";
+import tsconfigPaths from "vite-tsconfig-paths";
+import ViteYaml from "@modyfi/vite-plugin-yaml";
+import { dirname, resolve } from "node:path";
+import { fileURLToPath } from "node:url";
+import { galaxyLegacyPlugin } from "./vite-plugin-webpack-aliases.js";
+import { buildMetadataPlugin } from "./vite-plugin-build-metadata.js";
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+
+export default defineConfig({
+    define: {
+        // Make jQuery available globally for plugins and legacy code
+        global: "globalThis",
+        // Define build system for runtime checks
+        __GALAXY_BUILD_SYSTEM__: JSON.stringify("vite"),
+        // Define build timestamp
+        __buildTimestamp__: JSON.stringify(new Date().toISOString()),
+        // Define webpack public path as a no-op for Vite
+        __webpack_public_path__: "undefined",
+    },
+    plugins: [
+        vue(), // Vue 2.7 support
+        tsconfigPaths(), // TypeScript path resolution
+        ViteYaml(), // YAML file support
+        galaxyLegacyPlugin(), // Handle legacy webpack-style imports
+        buildMetadataPlugin(), // Generate build metadata (replaces DumpMetaPlugin)
+    ],
+    // resolve aliases are handled by galaxyLegacyPlugin
+    css: {
+        preprocessorOptions: {
+            scss: {
+                quietDeps: true,
+                silenceDeprecations: ["mixed-decls", "import"],
+                includePaths: ["src/style", "src/style/scss", "node_modules"],
+            },
+        },
+    },
+    build: {
+        outDir: "dist",
+        emptyOutDir: true,
+        // Generate manifest.json for production
+        manifest: true,
+        rollupOptions: {
+            input: {
+                // Entry points that will be referenced in templates
+                analysis: resolve(__dirname, "src/entry/analysis/index.ts"),
+                generic: resolve(__dirname, "src/entry/generic.js"),
+            },
+            output: {
+                entryFileNames: "[name].bundled.js",
+                chunkFileNames: "[name]-[hash].js",
+                assetFileNames: "[name]-[hash].[ext]",
+            },
+        },
+    },
+    server: {
+        port: process.env.VITE_PORT || 5173,
+        cors: true,
+        hmr: {
+            // Ensure HMR works correctly
+            protocol: "ws",
+            host: "localhost",
+        },
+        // Allow Galaxy to access Vite dev server
+        headers: {
+            "Access-Control-Allow-Origin": "*",
+            "Access-Control-Allow-Methods": "GET, POST, PUT, DELETE, OPTIONS",
+            "Access-Control-Allow-Headers": "Content-Type, Authorization",
+        },
+    },
+    worker: {
+        format: "es",
+    },
+});