improvement(docs): update GitHub App setup walkthrough

Author: icecrasher321

apps/docs/content/docs/platform/self-hosting/integrations-oauth.mdx

@@ -199,6 +199,8 @@ The private key must include its PEM header, footer, and contents. Sim accepts a
 
 Keep the private key and client secret in the deployment's server configuration; organization admins select installations in Sim without entering these secrets.
 
+If you run Search indexing on Trigger.dev, configure the same five variables in its matching environment. The app server and indexing worker both need the App credentials; updating the app's secret store alone does not update a separately configured worker.
+
 The **Client ID** is different from the numeric **App ID**. Use credentials from **Developer settings → GitHub Apps**. `GITHUB_CLIENT_ID` and `GITHUB_CLIENT_SECRET` belong to the separate GitHub sign-in integration and remain unchanged. Search does not read `GITHUB_REPO_CLIENT_ID` or `GITHUB_REPO_CLIENT_SECRET`.
 
 Keep **Expire user authorization tokens** enabled so Sim receives the refresh token it needs to [renew personal connections](https://docs.github.com/en/apps/creating-github-apps/authenticating-with-a-github-app/refreshing-user-access-tokens).

apps/docs/content/docs/search/github.mdx

@@ -38,14 +38,17 @@ In **Sync documents with**, choose **Connect GitHub App** to index through an in
 <Image className="mx-auto h-auto w-full max-w-md" src="/static/search/github-indexing-options.jpg" alt="GitHub source setup with indexing choices for connected members, a GitHub account, or a GitHub App" width={402} height={240} />
 
 1. Select **Connect your GitHub account** if prompted. Finish authorization in the new tab, then return and select **Refresh**.
+
+<Image className="mx-auto h-auto w-full max-w-md" src="/static/search/github-installation-connect.jpg" alt="Connect GitHub App dialog requiring a personal GitHub connection to verify manageable installations" width={402} height={172} />
+
 2. Select **Install GitHub App**. Choose your GitHub account or organization and the repositories to include. If it is already installed, check its repository selection.
 3. Return to Sim and select **Refresh**. Choose the installation and select **Use installation**. Only installations on your own account or organizations you own are available.
 
-<Image className="mx-auto h-auto w-full max-w-md" src="/static/search/github-installation-connect.jpg" alt="Connect GitHub App dialog requiring a personal GitHub connection to verify manageable installations" width={402} height={210} />
+<Image className="mx-auto h-auto w-full max-w-md" src="/static/search/github-installation-select.jpg" alt="GitHub App installation chooser with Install GitHub App, Refresh, and Use installation controls; account name redacted" width={402} height={180} />
 
 The installation is now selected under **Sync documents with**. You can reuse it when adding another repository source in the same Sim organization.
 
-Alternatively, leave **Connected members** selected to use members' accounts for indexing, or select an existing dedicated account. Each method still requires teammates to connect their own accounts for Search access.
+Alternatively, leave **Connected members** selected to use members' accounts for indexing. To use a dedicated indexing account, select it under **Sync documents with**, or choose **Connect GitHub account** to add one. Each method still requires teammates to connect their own accounts for Search access.
 
 </Step>
 <Step>