fix: resolve race condition in profile label updates

Fix regression where npubs/nprofiles weren't being replaced with profile names.
The issue was a race condition: loading state was cleared immediately, but labels
were applied asynchronously via RAF, causing the condition check to fail.

Changes:
- Apply profile labels immediately when profiles resolve, instead of batching via RAF
- Update condition check to explicitly handle undefined loading state (isLoading !== true)
- This ensures labels are available in the Map when loading becomes false

src/hooks/useProfileLabels.ts

@@ -273,7 +273,7 @@ export function useProfileLabels(
       console.log(`[profile-loading-debug][profile-labels-loading] Starting fetch for ${pubkeysToFetch.length} profiles:`, pubkeysToFetch.map(p => p.slice(0, 16) + '...'))
       
       // Reactive callback: collects profile updates and batches them via RAF to prevent flicker
-      // Strategy: Collect updates in ref, schedule RAF on first update, apply all in batch
+      // Strategy: Apply label immediately when profile resolves, but still batch for multiple profiles
       const handleProfileEvent = (event: NostrEvent) => {
         // Use pubkey directly as the key
         const pubkey = event.pubkey
@@ -282,10 +282,14 @@ export function useProfileLabels(
         const displayName = extractProfileDisplayName(event)
         const label = displayName ? (displayName.startsWith('@') ? displayName : `@${displayName}`) : getNpubFallbackDisplay(pubkey)
         
-        // Add to pending updates and schedule batched application
+        // Apply label immediately to prevent race condition with loading state
-        console.log(`[shimmer-debug][profile-labels] Adding to pending updates: ${pubkey.slice(0, 16)}...="${label}", pendingUpdates.size=${pendingUpdatesRef.current.size + 1}`)
+        // This ensures labels are available when isLoading becomes false
-        pendingUpdatesRef.current.set(pubkey, label)
+        console.log(`[shimmer-debug][profile-labels] Applying label immediately: ${pubkey.slice(0, 16)}...="${label}"`)
-        scheduleBatchedUpdate()
+        setProfileLabels(prevLabels => {
+          const updated = new Map(prevLabels)
+          updated.set(pubkey, label)
+          return updated
+        })
         
         // Clear loading state for this profile when it resolves
         console.log(`[profile-loading-debug][profile-labels-loading] Profile resolved for ${pubkey.slice(0, 16)}..., CLEARING LOADING`)

src/utils/nostrUriResolver.tsx

@@ -339,12 +339,15 @@ export function replaceNostrUrisInMarkdownWithProfileLabels(
         const pubkey = decoded.type === 'npub' ? decoded.data : decoded.data.pubkey
         
         // Check if we have a resolved profile name using pubkey as key
-        // Only use Map value if profile is not loading (meaning it's actually resolved)
+        // Use the label if: 1) we have a label, AND 2) profile is not currently loading (false or undefined)
         const isLoading = profileLoading.get(pubkey)
         const hasLabel = profileLabels.has(pubkey)
         console.log(`[shimmer-debug][markdown-replace] ${decoded.type} pubkey=${pubkey.slice(0, 16)}..., isLoading=${isLoading}, hasLabel=${hasLabel}`)
         
-        if (!isLoading && hasLabel) {
+        // Use resolved label if we have one and profile is not loading
+        // isLoading can be: true (loading), false (loaded), or undefined (never was loading)
+        // We only avoid using the label if isLoading === true
+        if (isLoading !== true && hasLabel) {
           const displayName = profileLabels.get(pubkey)!
           console.log(`[shimmer-debug][markdown-replace] Using resolved name: ${displayName}`)
           return `[${displayName}](${link})`