feat: LinkedIn video upload working + static file serving

- Add /public static route to serve files from /vaults/public
- Fix LinkedIn API version: 202501 → 202603 (active version)
- OpenAPI schema already included POST /api/linkedin/video
- Successfully posted Remotion video to LinkedIn

src/clients/linkedin.ts

@@ -133,7 +133,7 @@ async function linkedinRestRequest(
     headers: {
       'Authorization': `Bearer ${accessToken}`,
       'Content-Type': 'application/json',
-      'LinkedIn-Version': '202501',
+      'LinkedIn-Version': '202603',
       'X-Restli-Protocol-Version': '2.0.0',
     },
     body: body ? JSON.stringify(body) : undefined,
@@ -224,7 +224,7 @@ export async function createVideoPost(
       headers: {
         'Authorization': `Bearer ${accessToken}`,
         'Content-Type': 'application/json',
-        'LinkedIn-Version': '202501',
+        'LinkedIn-Version': '202603',
         'X-Restli-Protocol-Version': '2.0.0',
       },
       body: JSON.stringify({

src/index.ts

@@ -35,6 +35,9 @@ app.use(cors({
 app.use(express.json());
 app.use(express.urlencoded({ extended: true }));
 
+// ── Static files (videos, assets) ──────────────────────────────────────────
+app.use('/public', express.static('/vaults/public'));
+
 // ── Config ─────────────────────────────────────────────────────────────────
 const PORT = process.env.PORT ?? 3456;
 const SERVER_URL = process.env.SERVER_URL ?? `http://localhost:${PORT}`;

src/manifest.ts

@@ -342,6 +342,30 @@ export function getOpenApiSpec(serverUrl: string) {
           responses: { '200': { description: 'Post created' } },
         },
       },
+      '/api/linkedin/video': {
+        post: {
+          operationId: 'linkedin_upload_video',
+          summary: 'Upload video and create LinkedIn post',
+          requestBody: {
+            required: true,
+            content: {
+              'application/json': {
+                schema: {
+                  type: 'object',
+                  required: ['video_url', 'text'],
+                  properties: {
+                    video_url: { type: 'string', description: 'Publicly accessible URL of the MP4 video' },
+                    text: { type: 'string' },
+                    visibility: { type: 'string', enum: ['PUBLIC', 'CONNECTIONS'] },
+                    account: { type: 'string' },
+                  },
+                },
+              },
+            },
+          },
+          responses: { '200': { description: 'Video uploaded and posted' } },
+        },
+      },
 
       // ── Telegram ────────────────────────────────────────────────
       '/api/telegram/message': {