refactor(frontend): centralize configurations and deduplicate dependencies in common workspace

- Centralized biome.json, tailwind.config.ts, and vite.config.ts into common/config.
- Updated sub-apps to inherit from shared base configurations.
- Deduplicated dependencies across apps using common workspace.
- Fixed TypeScript resolution issues by restoring necessary build dependencies.
- Removed obsolete package-lock.json files.
- Applied minor import fixes via Biome.
- Fixed react-router-dom v7 type errors.

common/config/biome.base.json

@@ -0,0 +1,32 @@
+{
+  "$schema": "https://biomejs.dev/schemas/1.9.4/schema.json",
+  "formatter": {
+    "enabled": true,
+    "indentStyle": "space"
+  },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "style": {
+        "useEnumInitializers": "off"
+      },
+      "a11y": {
+        "noLabelWithoutControl": "off"
+      }
+    }
+  },
+  "organizeImports": {
+    "enabled": true
+  },
+  "files": {
+    "ignore": [
+      "dist",
+      ".vite",
+      "node_modules",
+      "tsconfig*.json",
+      "test-results",
+      "test-results.nobody-backup",
+      "playwright-report"
+    ]
+  }
+}

common/config/vite.base.ts

@@ -0,0 +1,42 @@
+import react from "@vitejs/plugin-react";
+import { defineConfig, type UserConfig } from "vite";
+
+export const commonViteConfig: UserConfig = {
+  plugins: [react()],
+  // Since we are using pnpm and common is our root, we might not need the strict aliases 
+  // for react and lucide-react anymore, as pnpm will resolve them correctly from the root node_modules.
+  // If we do need them, we can add them back per-app or dynamically resolve from common's __dirname.
+  build: {
+    emptyOutDir: true,
+  },
+};
+
+export function hostFromUrl(value: string | undefined) {
+  if (!value) return undefined;
+  try {
+    return new URL(value).hostname;
+  } catch {
+    return value;
+  }
+}
+
+export function getAllowedHosts(
+  defaultHosts: string[],
+  envUrl?: string,
+  envAllowedHosts?: string
+) {
+  return Array.from(
+    new Set(
+      [
+        ...defaultHosts,
+        hostFromUrl(envUrl),
+        ...(envAllowedHosts ?? "")
+          .split(",")
+          .map((host) => host.trim())
+          .filter(Boolean),
+      ].filter((host): host is string => Boolean(host))
+    )
+  );
+}
+
+export default defineConfig(commonViteConfig);