Refactor app by modularizing components and extracting utilities.

The changes split large features into smaller, reusable components like `AdminPanel`, `LoginPage`, `TopBar`, `PasswordModal`, and `ChipModal`. Utility functions such as `cycleTag` and `chipStorage` were extracted for better organization. This improves the code's readability, maintainability, and scalability.

frontend/src/utils/chipStorage.js

@@ -0,0 +1,23 @@
+function chipStorageKey(gameId, entryId) {
+    return `chip:${gameId}:${entryId}`;
+  }
+
+  export function getChipLS(gameId, entryId) {
+    try {
+      return localStorage.getItem(chipStorageKey(gameId, entryId));
+    } catch {
+      return null;
+    }
+  }
+
+  export function setChipLS(gameId, entryId, chip) {
+    try {
+      localStorage.setItem(chipStorageKey(gameId, entryId), chip);
+    } catch {}
+  }
+
+  export function clearChipLS(gameId, entryId) {
+    try {
+      localStorage.removeItem(chipStorageKey(gameId, entryId));
+    } catch {}
+  }