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/plugins.ts

@@ -1,102 +0,0 @@
-import { atom, map } from 'nanostores'
-import { createFetcherStore, createMutatorStore } from './fetcher'
-
-export interface Plugin {
-  id: string
-  name: string
-  language: 'typescript' | 'go'
-  source: string
-  hooks: string[]
-  enabled: boolean
-  wasm?: string
-  wasm_size?: number
-  created_at: string
-  updated_at: string
-}
-
-export interface CompileResult {
-  success: boolean
-  wasm?: string
-  size?: number
-  errors?: string[]
-  time_ms?: number
-}
-
-export const $plugins = createFetcherStore<Plugin[]>(['/api/studio/plugins'])
-
-export const $currentPlugin = map<Partial<Plugin>>({
-  name: '',
-  language: 'typescript',
-  source: '',
-  hooks: [],
-  enabled: true,
-})
-
-export const $compileResult = atom<CompileResult | null>(null)
-export const $isCompiling = atom(false)
-
-export const $savePlugin = createMutatorStore(async ({ data, invalidate }: { data: Plugin; invalidate: (key: string) => void }) => {
-  const res = await fetch('/api/studio/plugins', {
-    method: 'POST',
-    headers: { 'Content-Type': 'application/json' },
-    body: JSON.stringify(data),
-  })
-  if (!res.ok) throw new Error('Failed to save plugin')
-  invalidate('/api/studio/plugins')
-  return res.json()
-})
-
-export const $deletePlugin = createMutatorStore(async ({ data: id, invalidate }: { data: string; invalidate: (key: string) => void }) => {
-  const res = await fetch(`/api/studio/plugins/${id}`, { method: 'DELETE' })
-  if (!res.ok) throw new Error('Failed to delete plugin')
-  invalidate('/api/studio/plugins')
-})
-
-export const $togglePlugin = createMutatorStore(async ({ data, invalidate }: { data: { id: string; enabled: boolean }; invalidate: (key: string) => void }) => {
-  const res = await fetch(`/api/studio/plugins/${data.id}/toggle`, {
-    method: 'PUT',
-    headers: { 'Content-Type': 'application/json' },
-    body: JSON.stringify({ enabled: data.enabled }),
-  })
-  if (!res.ok) throw new Error('Failed to toggle plugin')
-  invalidate('/api/studio/plugins')
-})
-
-export async function compilePlugin(language: string, source: string): Promise<CompileResult> {
-  $isCompiling.set(true)
-  $compileResult.set(null)
-
-  try {
-    const res = await fetch('/api/studio/plugins/compile', {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ language, source }),
-    })
-    const result = await res.json()
-    $compileResult.set(result)
-    return result
-  } finally {
-    $isCompiling.set(false)
-  }
-}
-
-export async function testPlugin(pluginId: string, hook: string, testData: object): Promise<any> {
-  const res = await fetch(`/api/studio/plugins/${pluginId}/test`, {
-    method: 'POST',
-    headers: { 'Content-Type': 'application/json' },
-    body: JSON.stringify({ hook, data: testData }),
-  })
-  return res.json()
-}
-
-export const AVAILABLE_HOOKS = [
-  { value: 'post.published', label: 'Post Published', description: 'Triggered when a post is published' },
-  { value: 'post.updated', label: 'Post Updated', description: 'Triggered when a published post is updated' },
-  { value: 'comment.created', label: 'Comment Created', description: 'Triggered when a new comment is posted' },
-  { value: 'subscriber.created', label: 'Subscriber Created', description: 'Triggered when someone subscribes' },
-]
-
-export const LANGUAGES = [
-  { value: 'typescript', label: 'TypeScript', extension: '.ts' },
-  { value: 'go', label: 'Go', extension: '.go' },
-]