asdf

Squash the current repository state back into one baseline commit while
preserving the README reframing and repository contents.

Constraint: User explicitly requested a single squashed commit with subject "asdf"
Confidence: high
Scope-risk: broad
Reversibility: clean
Directive: This commit intentionally rewrites published history; coordinate before future force-pushes
Tested: git status clean; local history rewritten to one commit; force-pushed main to origin and instructkr
Not-tested: Fresh clone verification after push

src/hooks/notifs/useStartupNotification.ts

@@ -0,0 +1,41 @@
+import { useEffect, useRef } from 'react'
+import { getIsRemoteMode } from '../../bootstrap/state.js'
+import {
+  type Notification,
+  useNotifications,
+} from '../../context/notifications.js'
+import { logError } from '../../utils/log.js'
+
+type Result = Notification | Notification[] | null
+
+/**
+ * Fires notification(s) once on mount. Encapsulates the remote-mode gate and
+ * once-per-session ref guard that was hand-rolled across 10+ notifs/ hooks.
+ *
+ * The compute fn runs exactly once on first effect. Return null to skip,
+ * a Notification to fire one, or an array to fire several. Sync or async.
+ * Rejections are routed to logError.
+ */
+export function useStartupNotification(
+  compute: () => Result | Promise<Result>,
+): void {
+  const { addNotification } = useNotifications()
+  const hasRunRef = useRef(false)
+  const computeRef = useRef(compute)
+  computeRef.current = compute
+
+  useEffect(() => {
+    if (getIsRemoteMode() || hasRunRef.current) return
+    hasRunRef.current = true
+
+    void Promise.resolve()
+      .then(() => computeRef.current())
+      .then(result => {
+        if (!result) return
+        for (const n of Array.isArray(result) ? result : [result]) {
+          addNotification(n)
+        }
+      })
+      .catch(logError)
+  }, [addNotification])
+}