Update project structure and enhance frontend functionality

- Added a new AGENTS.md file to document the project structure and conventions.
- Updated .gitignore to include node_modules and refined cursor rules.
- Introduced new backend and frontend components for improved map interactions, including context menus and controls.
- Enhanced API composables for better admin and authentication functionalities.
- Refactored existing components for cleaner code and improved user experience.
- Updated README.md to clarify production asset serving and user setup instructions.

frontend-nuxt/components/map/MapContextMenu.vue

@@ -0,0 +1,63 @@
+<template>
+  <!-- Context menu (tile) -->
+  <div
+    v-show="contextMenu.tile.show"
+    class="fixed z-[1000] bg-base-100/95 backdrop-blur-xl shadow-xl rounded-lg border border-base-300 py-1 min-w-[180px] transition-opacity duration-150"
+    :style="{ left: contextMenu.tile.x + 'px', top: contextMenu.tile.y + 'px' }"
+  >
+    <button
+      type="button"
+      class="btn btn-ghost btn-sm w-full justify-start hover:bg-base-200 transition-colors"
+      @click="onWipeTile(contextMenu.tile.data?.coords)"
+    >
+      Wipe tile {{ contextMenu.tile.data?.coords?.x }}, {{ contextMenu.tile.data?.coords?.y }}
+    </button>
+    <button
+      type="button"
+      class="btn btn-ghost btn-sm w-full justify-start hover:bg-base-200 transition-colors"
+      @click="onRewriteCoords(contextMenu.tile.data?.coords)"
+    >
+      Rewrite tile coords
+    </button>
+  </div>
+  <!-- Context menu (marker) -->
+  <div
+    v-show="contextMenu.marker.show"
+    class="fixed z-[1000] bg-base-100/95 backdrop-blur-xl shadow-xl rounded-lg border border-base-300 py-1 min-w-[180px] transition-opacity duration-150"
+    :style="{ left: contextMenu.marker.x + 'px', top: contextMenu.marker.y + 'px' }"
+  >
+    <button
+      type="button"
+      class="btn btn-ghost btn-sm w-full justify-start hover:bg-base-200 transition-colors"
+      @click="onHideMarker(contextMenu.marker.data?.id)"
+    >
+      Hide marker {{ contextMenu.marker.data?.name }}
+    </button>
+  </div>
+</template>
+
+<script setup lang="ts">
+import type { ContextMenuState } from '~/composables/useMapLogic'
+
+defineProps<{
+  contextMenu: ContextMenuState
+}>()
+
+const emit = defineEmits<{
+  wipeTile: [coords: { x: number; y: number } | undefined]
+  rewriteCoords: [coords: { x: number; y: number } | undefined]
+  hideMarker: [id: number | undefined]
+}>()
+
+function onWipeTile(coords: { x: number; y: number } | undefined) {
+  if (coords) emit('wipeTile', coords)
+}
+
+function onRewriteCoords(coords: { x: number; y: number } | undefined) {
+  if (coords) emit('rewriteCoords', coords)
+}
+
+function onHideMarker(id: number | undefined) {
+  if (id != null) emit('hideMarker', id)
+}
+</script>