Implement HTTP timeout configurations and enhance API documentation

- Added optional HTTP server timeout configurations (`HNHMAP_READ_TIMEOUT`, `HNHMAP_WRITE_TIMEOUT`, `HNHMAP_IDLE_TIMEOUT`) to `.env.example` and updated the server initialization in `main.go` to utilize these settings.
- Enhanced API documentation for the `rebuildZooms` endpoint to clarify its background processing and polling mechanism for status updates.
- Updated `configuration.md` to include new timeout environment variables for better configuration guidance.
- Improved error handling in the client for large request bodies, ensuring appropriate responses for oversized payloads.

frontend-nuxt/components/map/MapSearch.vue

@@ -98,6 +98,20 @@ const recent = useRecentLocations()
 
 const inputRef = ref<HTMLInputElement | null>(null)
 const query = ref('')
+const queryDebounced = ref('')
+let queryDebounceId: ReturnType<typeof setTimeout> | null = null
+const SEARCH_DEBOUNCE_MS = 180
+watch(
+  query,
+  (v) => {
+    if (queryDebounceId) clearTimeout(queryDebounceId)
+    queryDebounceId = setTimeout(() => {
+      queryDebounced.value = v
+      queryDebounceId = null
+    }, SEARCH_DEBOUNCE_MS)
+  },
+  { immediate: true }
+)
 const showDropdown = ref(false)
 const highlightIndex = ref(0)
 let closeDropdownTimer: ReturnType<typeof setTimeout> | null = null
@@ -113,7 +127,7 @@ interface Suggestion {
 }
 
 const suggestions = computed<Suggestion[]>(() => {
-  const q = query.value.trim().toLowerCase()
+  const q = queryDebounced.value.trim().toLowerCase()
   if (!q) return []
 
   const coordMatch = q.match(/^\s*(-?\d+)\s*[,;\s]\s*(-?\d+)\s*$/)
@@ -193,10 +207,18 @@ const emit = defineEmits<{
   'jump-to-marker': [id: number]
 }>()
 
+watch(suggestions, () => {
+  highlightIndex.value = 0
+}, { flush: 'sync' })
+
 onMounted(() => {
   useMapNavigate().setFocusSearch(() => inputRef.value?.focus())
 })
 
+onBeforeUnmount(() => {
+  if (queryDebounceId) clearTimeout(queryDebounceId)
+})
+
 onBeforeUnmount(() => {
   if (closeDropdownTimer) clearTimeout(closeDropdownTimer)
   useMapNavigate().setFocusSearch(null)