refactor(services): drop the bespoke retry engine from the query wrapper

The custom onErrorRetry existed only to honor a function-form
retryDelay, which exactly one caller (the app data provider) used for
exponential backoff. Fall back to SWR's built-in error retry and
express that caller's cadence with constant options.

src/providers/app-data-provider.tsx

@@ -26,7 +26,9 @@ const TQ_MIHOMO = {
   refetchOnReconnect: false,
   staleTime: 1500,
   retry: 3,
-  retryDelay: (attempt: number) => Math.min(200 * 2 ** attempt, 3000),
+  // SWR's default retry waits about 2^retryCount * errorRetryInterval with
+  // jitter, so 100 reproduces the previous 200 * 2^attempt backoff.
+  retryDelay: 100,
 } as const
 
 const TQ_DEFAULTS = {

src/services/query-client.ts

@@ -18,7 +18,7 @@ type QueryOptions<T> = {
   placeholderData?: T | (() => T | undefined)
   staleTime?: number
   retry?: number | false
-  retryDelay?: number | ((attempt: number) => number)
+  retryDelay?: number
   refetchInterval?: number | false
   refetchIntervalInBackground?: boolean
   revalidateOnMount?: boolean
@@ -90,25 +90,9 @@ export function useQuery<T>(options: QueryOptions<T>): QueryResult<T> {
   const swr = useSWR<T>(enabled ? queryKey : null, queryFn, {
     dedupingInterval: staleTime,
     errorRetryCount: retry === false ? 0 : retry,
-    errorRetryInterval:
-      typeof retryDelay === 'number'
-        ? retryDelay
-        : swrConfig.errorRetryInterval,
+    errorRetryInterval: retryDelay ?? swrConfig.errorRetryInterval,
     fallbackData,
     keepPreviousData: placeholderData !== undefined,
-    onErrorRetry: (_error, _key, config, revalidate, { retryCount }) => {
-      const maxRetries = config.errorRetryCount
-      if (maxRetries !== undefined && retryCount > maxRetries) return
-
-      const interval =
-        typeof retryDelay === 'function'
-          ? retryDelay(Math.max(retryCount - 1, 0))
-          : config.errorRetryInterval
-
-      setTimeout(() => {
-        revalidate({ retryCount, dedupe: true })
-      }, interval)
-    },
     revalidateOnFocus: refetchOnWindowFocus,
     revalidateOnMount,
     revalidateOnReconnect: refetchOnReconnect,