refactor: replace custom NIP-19 parsing with applesauce helpers and add progressive profile resolution

- Replace custom regex patterns with Tokens.nostrLink from applesauce-content
- Use getContentPointers() and getPubkeyFromDecodeResult() from applesauce helpers
- Add useProfileLabels hook for shared profile resolution logic
- Implement progressive profile name updates in markdown articles
- Remove unused ContentWithResolvedProfiles component
- Simplify useMarkdownToHTML by extracting profile resolution to shared hook
- Fix TypeScript and ESLint errors

src/hooks/useProfileLabels.ts

@@ -0,0 +1,45 @@
+import { useMemo } from 'react'
+import { useEventModel } from 'applesauce-react/hooks'
+import { Models, Helpers } from 'applesauce-core'
+import { getContentPointers } from 'applesauce-factory/helpers'
+
+const { getPubkeyFromDecodeResult, encodeDecodeResult } = Helpers
+
+/**
+ * Hook to resolve profile labels from content containing npub/nprofile identifiers
+ * Returns a Map of encoded identifier -> display name that updates progressively as profiles load
+ */
+export function useProfileLabels(content: string): Map<string, string> {
+  // Extract profile pointers (npub and nprofile) using applesauce helpers
+  const profileData = useMemo(() => {
+    const pointers = getContentPointers(content)
+    return pointers
+      .filter(p => p.type === 'npub' || p.type === 'nprofile')
+      .map(pointer => ({
+        pubkey: getPubkeyFromDecodeResult(pointer),
+        encoded: encodeDecodeResult(pointer)
+      }))
+      .filter(p => p.pubkey)
+  }, [content])
+
+  // Fetch profiles for all found pubkeys (progressive loading)
+  const profiles = profileData.map(({ pubkey }) => 
+    useEventModel(Models.ProfileModel, pubkey ? [pubkey] : null)
+  )
+
+  // Build profile labels map that updates reactively as profiles load
+  return useMemo(() => {
+    const labels = new Map<string, string>()
+    profileData.forEach(({ encoded }, index) => {
+      const profile = profiles[index]
+      if (profile) {
+        const displayName = profile.name || profile.display_name || profile.nip05
+        if (displayName) {
+          labels.set(encoded, `@${displayName}`)
+        }
+      }
+    })
+    return labels
+  }, [profileData, profiles])
+}
+