Initial commit: YouTube Studio Flow (backend, frontend, infrastructure, docs)

backend/src/modules/linting/rules/remote-conflict.rule.ts

@@ -0,0 +1,18 @@
+import { LintSeverity } from '@prisma/client';
+import { LintRule, LintIssue } from './base.rule';
+
+export class RemoteConflictRule implements LintRule {
+  code = 'REMOTE_CONFLICT';
+  severity = LintSeverity.ERROR;
+
+  check(video: any): LintIssue | null {
+    if (video.remoteConflict) {
+      return {
+        message: 'Remote YouTube metadata has changed since last sync — local and remote are out of sync',
+        targetField: 'sync',
+        fixSuggestion: 'Review the remote changes and re-sync to resolve the conflict.',
+      };
+    }
+    return null;
+  }
+}