feat: organize project conversations and add coding teacher side chat

electron/main/app-deep-link.ts

@@ -4,7 +4,14 @@ export type NianCodeDeepLink = {
   type: 'desktop-auth-callback';
   requestId: string;
   url: string;
-} | { type: 'cloud-agent'; slug: string; url: string };
+} | { type: 'cloud-agent'; slug: string; url: string }
+  | { type: 'teacher-preview'; draftRevision: number; url: string };
+
+let pendingTeacherPreviewRevision: number | null = null;
+export function queueTeacherPreviewRevision(revision: number): void { pendingTeacherPreviewRevision = revision; }
+export function takeTeacherPreviewRevision(): number | null {
+  const revision = pendingTeacherPreviewRevision; pendingTeacherPreviewRevision = null; return revision;
+}
 
 let pendingCloudAgentRoute: string | null = null;
 export function queueCloudAgentLink(slug: string): void {
@@ -39,6 +46,17 @@ export function parseNianCodeDeepLinkUrl(rawUrl: string): NianCodeDeepLink | nul
     return null;
   }
 
+  if (url.hostname === 'coding-teacher' && url.pathname === '/preview'
+    && !url.username && !url.password && !url.port && !url.hash
+    && [...url.searchParams.keys()].length === 1 && url.searchParams.has('draft_revision')) {
+    const value = url.searchParams.get('draft_revision')!;
+    const draftRevision = Number(value);
+    if (/^[1-9][0-9]*$/.test(value) && Number.isSafeInteger(draftRevision)) {
+      return { type: 'teacher-preview', draftRevision, url: rawUrl };
+    }
+    return null;
+  }
+
   if (url.hostname !== 'auth' || url.pathname !== '/callback') {
     return null;
   }