chore: synchronize pending app/backend updates and repository hygiene

Includes current frontend and backend work in progress and removes generated artifacts from tracking to keep the repository clean for дальнейшая разработка.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/(main)/traffic/page.tsx

@@ -290,8 +290,17 @@ const userTraffic: UserTraffic[] = [
 
 // ─── types ────────────────────────────────────────────────────────────────────
 
-const RANGES = ["5м", "15м", "1ч", "4ч", "24ч"] as const
-type Range = typeof RANGES[number]
+/** Ключи совпадают с `rangeToMinutes` в API (`/api/traffic/...`). */
+const TRAFFIC_RANGE_KEYS = ["5m", "15m", "1h", "4h", "24h"] as const
+type Range = (typeof TRAFFIC_RANGE_KEYS)[number]
+
+const TRAFFIC_RANGE_LABELS: Record<Range, string> = {
+  "5m": "5м",
+  "15m": "15м",
+  "1h": "1ч",
+  "4h": "4ч",
+  "24h": "24ч",
+}
 
 type GroupMode = "servers" | "users" | "gre"
 type SortField = "rx" | "tx" | "name" | "sessions"
@@ -575,10 +584,10 @@ function DetailHeader({ range, setRange, children }: {
     <div className="flex items-start justify-between mb-3 gap-3">
       <div className="flex items-center gap-2 flex-wrap min-w-0">{children}</div>
       <div className="flex gap-1 shrink-0">
-        {RANGES.map(r => (
+        {TRAFFIC_RANGE_KEYS.map((r) => (
           <Button key={r} size="sm" variant={r === range ? "default" : "ghost"}
             className="h-7 px-2 text-xs" onClick={() => setRange(r)}>
-            {r}
+            {TRAFFIC_RANGE_LABELS[r]}
           </Button>
         ))}
       </div>
@@ -772,7 +781,7 @@ export default function TrafficPage() {
   const [sortField, setSortField] = useState<SortField>("rx")
   const [sortDir,   setSortDir]   = useState<SortDir>("desc")
   const [selectedId, setSelectedId] = useState("srv1")
-  const [range, setRange] = useState<Range>("1ч")
+  const [range, setRange] = useState<Range>("1h")
   const [search, setSearch] = useState("")
   const [liveServers, setLiveServers] = useState<ServerTraffic[]>([])
   const [liveBusy, setLiveBusy] = useState(false)