refactor: split Me into Me and Profile components for simpler /p/ pages

- Create Profile.tsx for viewing other users (highlights + writings only)
- Profile uses useStoreTimeline for instant cache-first display
- Background fetches populate event store non-blocking
- Extract toBlogPostPreview helper for reuse
- Simplify Me.tsx to only handle own profile (/me routes)
- Remove isOwnProfile branching and cached data logic from Me
- Update Bookmarks.tsx to render Profile for /p/ routes
- Keep code DRY and files under 210 lines

src/utils/toBlogPostPreview.ts

@@ -0,0 +1,15 @@
+import { NostrEvent } from 'nostr-tools'
+import { Helpers } from 'applesauce-core'
+import { BlogPostPreview } from '../services/exploreService'
+
+const { getArticleTitle, getArticleImage, getArticlePublished, getArticleSummary } = Helpers
+
+export const toBlogPostPreview = (event: NostrEvent): BlogPostPreview => ({
+  event,
+  title: getArticleTitle(event) || 'Untitled',
+  summary: getArticleSummary(event),
+  image: getArticleImage(event),
+  published: getArticlePublished(event),
+  author: event.pubkey
+})
+