feat(backend): update collections, config and migration tools

Update Payload CMS configuration, collections (Audit, Posts), and add migration scripts/reports.

apps/backend/scripts/migration/fix-content-structure.ts

@@ -0,0 +1,90 @@
+#!/usr/bin/env tsx
+/**
+ * Fix Post Content Structure
+ *
+ * Converts migrated posts from direct Lexical format to Payload's {root: ...} format
+ */
+
+import { config as dotenvConfig } from 'dotenv'
+dotenvConfig({ path: '.env' })
+
+import { getPayload } from 'payload'
+import config from '../../src/payload.config'
+
+async function main() {
+  const payload = await getPayload({ config })
+
+  console.log('🔧 Fixing post content structure...\n')
+
+  const posts = await payload.find({
+    collection: 'posts',
+    limit: 100,
+    depth: 0,
+  })
+
+  console.log(`Found ${posts.totalDocs} posts to check\n`)
+
+  let fixed = 0
+  let skipped = 0
+
+  for (const post of posts.docs) {
+    const id = post.id
+    const title = post.title?.substring(0, 40)
+
+    // Check if content is an object (needs fixing)
+    if (post.content && typeof post.content === 'object') {
+      // Check if it's already in correct format { root: {...} }
+      if (post.content.root && typeof post.content.root === 'object') {
+        console.log(`⏭️  Skipping (already correct): ${title}`)
+        skipped++
+        continue
+      }
+
+      // Fix: wrap in { root: ... } structure
+      const fixedContent = JSON.stringify({ root: post.content })
+
+      try {
+        await payload.update({
+          collection: 'posts',
+          id,
+          data: {
+            content: fixedContent,
+          },
+        })
+        console.log(`✓ Fixed: ${title}`)
+        fixed++
+      } catch (error) {
+        console.error(`✗ Failed to fix "${title}":`, error)
+      }
+    } else if (post.content && typeof post.content === 'string') {
+      // String content - check if it needs fixing
+      try {
+        const parsed = JSON.parse(post.content)
+        if (parsed.root) {
+          console.log(`⏭️  Skipping (already correct): ${title}`)
+          skipped++
+        } else {
+          // Need to wrap in { root: ... }
+          const fixedContent = JSON.stringify({ root: parsed })
+          await payload.update({
+            collection: 'posts',
+            id,
+            data: { content: fixedContent },
+          })
+          console.log(`✓ Fixed: ${title}`)
+          fixed++
+        }
+      } catch (e) {
+        console.log(`⏭️  Skipping (invalid JSON): ${title}`)
+        skipped++
+      }
+    } else {
+      skipped++
+    }
+  }
+
+  console.log(`\n✅ Fixed ${fixed} posts`)
+  console.log(`⏭️ Skipped ${skipped} posts`)
+}
+
+main().catch(console.error)