fix: make relay-probe timers and effect hooks lint-clean across ESLint versions

- Replace single-assignment `let timer` with a `timers[]` array in
  citrine.ts and relayProbe.ts so stricter prefer-const builds pass
  (the newer ESLint pulled in by `npm audit fix` flagged the let as
  never-reassigned).
- Drop two now-redundant `eslint-disable react-hooks/exhaustive-deps`
  directives in NostrProvider and MapPage. Newer react-hooks no longer
  reports those lines, so the directives were flagged as unused errors
  under reportUnusedDisableDirectives; removing them is safe in both
  old (warning only) and new (silent) ESLint.

Co-authored-by: shakespeare.diy <assistant@shakespeare.diy>

src/components/NostrProvider.tsx

@@ -103,7 +103,6 @@ const NostrProvider: React.FC<NostrProviderProps> = (props) => {
     }
     // Intentionally run once on mount; relay changes are handled by the
     // invalidation effects above and lazy-open on demand.
-    // eslint-disable-next-line react-hooks/exhaustive-deps
   }, []);
 
   // Initialize NPool only once

src/lib/citrine.ts

@@ -132,12 +132,12 @@ export function probeCitrine(
     let settled = false;
     let opened = false;
     let ws: WebSocket | undefined;
-    let timer: ReturnType<typeof setTimeout> | undefined;
+    const timers: ReturnType<typeof setTimeout>[] = [];
 
     const done = (ok: boolean, reason: string) => {
       if (settled) return;
       settled = true;
-      if (timer) clearTimeout(timer);
+      for (const t of timers) clearTimeout(t);
       try {
         ws?.close();
       } catch {
@@ -160,10 +160,10 @@ export function probeCitrine(
 
     const subId = `citrine-probe-${Math.random().toString(36).slice(2, 10)}`;
 
-    timer = setTimeout(() => {
+    timers.push(setTimeout(() => {
       // Distinguish "never opened" (blocked/refused) from "opened but silent".
       done(false, opened ? 'opened-but-no-nostr-reply' : 'timeout-no-open');
-    }, timeoutMs);
+    }, timeoutMs));
 
     ws.onopen = () => {
       opened = true;

src/lib/relayProbe.ts

@@ -29,12 +29,12 @@ export function probeRelay(url: string, timeoutMs = 4000): Promise<RelayProbeRes
     let settled = false;
     let opened = false;
     let ws: WebSocket | undefined;
-    let timer: ReturnType<typeof setTimeout> | undefined;
+    const timers: ReturnType<typeof setTimeout>[] = [];
 
     const done = (ok: boolean, reason: string) => {
       if (settled) return;
       settled = true;
-      if (timer) clearTimeout(timer);
+      for (const t of timers) clearTimeout(t);
       try {
         ws?.close();
       } catch {
@@ -55,9 +55,9 @@ export function probeRelay(url: string, timeoutMs = 4000): Promise<RelayProbeRes
 
     const subId = `probe-${Math.random().toString(36).slice(2, 10)}`;
 
-    timer = setTimeout(() => {
+    timers.push(setTimeout(() => {
       done(false, opened ? 'opened-but-no-nostr-reply' : 'timeout-no-open');
-    }, timeoutMs);
+    }, timeoutMs));
 
     ws.onopen = () => {
       opened = true;

src/pages/MapPage.tsx

@@ -813,7 +813,6 @@ export default function MapPage() {
     return () => {
       cancelled = true;
     };
-    // eslint-disable-next-line react-hooks/exhaustive-deps
   }, []);
 
   // Combine spots and shops into unified list for map display