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 {}
+  }  

frontend/src/utils/cycleTag.js

@@ -0,0 +1,11 @@
+/**
+ * Backend erlaubt: null | "i" | "m" | "s"
+ * Rotation:
+ * null -> i -> m -> s (Popup) -> null
+ */
+export function cycleTag(tag) {
+  if (!tag) return "i";
+  if (tag === "i") return "m";
+  if (tag === "m") return "s";
+  return null;
+}