refactor: move studio to frontends workspace

- Move studio from root to frontends/studio/
- Add owner-tools frontend for live blog admin UI
- Add shared ui component library
- Set up npm workspaces for frontends
- Add enhanced code block extension for editor

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

studio/src/stores/interactions.ts

@@ -1,74 +0,0 @@
-import { atom, map, computed, onMount } from 'nanostores'
-import { createFetcherStore, createBlogMutatorStore } from './fetcher'
-import type { InteractionConfig } from '../types'
-
-const defaultConfig: InteractionConfig = {
-  comments_enabled: false,
-  reactions_enabled: false,
-  reaction_mode: 'emoji',
-  reaction_emojis: '👍,❤️,🎉,🚀',
-  upvote_icon: 'arrow',
-  reactions_require_auth: false,
-}
-
-export const $interactionsData = createFetcherStore<InteractionConfig>(['/api/studio/interaction-config'])
-
-export const $interactions = map<InteractionConfig>({ ...defaultConfig })
-export const $initialInteractions = atom<InteractionConfig | null>(null)
-
-export const $hasInteractionChanges = computed(
-  [$interactions, $initialInteractions],
-  (current, initial) => initial !== null && JSON.stringify(current) !== JSON.stringify(initial)
-)
-
-export const $changedInteractionFields = computed(
-  [$interactions, $initialInteractions],
-  (current, initial) => {
-    if (!initial) return []
-    const changes: string[] = []
-    const labels: Record<string, string> = {
-      comments_enabled: 'Comments',
-      reactions_enabled: 'Reactions',
-      reaction_mode: 'Reaction mode',
-      reaction_emojis: 'Emojis',
-      upvote_icon: 'Upvote icon',
-      reactions_require_auth: 'Auth required',
-    }
-    for (const key of Object.keys(current) as (keyof InteractionConfig)[]) {
-      if (current[key] !== initial[key]) {
-        changes.push(labels[key] || key)
-      }
-    }
-    return changes
-  }
-)
-
-onMount($interactionsData, () => {
-  $interactionsData.listen(({ data }) => {
-    if (data) {
-      const merged = { ...defaultConfig, ...data }
-      $interactions.set(merged)
-      $initialInteractions.set(merged)
-    }
-  })
-})
-
-export const $saveInteractions = createBlogMutatorStore<InteractionConfig>(
-  async ({ data: config }) => {
-    const previous = $initialInteractions.get()
-    $initialInteractions.set({ ...config })
-
-    const res = await fetch('/api/studio/interaction-config', {
-      method: 'PUT',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify(config),
-    })
-
-    if (!res.ok) {
-      $initialInteractions.set(previous)
-      throw new Error('Failed to save interactions')
-    }
-
-    return config
-  }
-)