docs(model-serving): add captured screenshots for PR B

Captures 6 of 9 planned screenshots × 4 languages (24 PNGs) for the Model Serving overhaul:
- model_serving_create_modal.png
- model_serving_add_revision_modal.png
- endpoint_detail_private_alert.png
- endpoint_detail_visibility.png
- endpoint_detail_more_menu.png
- revision_history_tab.png

Skipped (TODO markers retained — require specific deployment state not reachable on the test backend in this session):
- endpoint_detail_ready_alert.png (needs a successfully deployed Ready revision)
- endpoint_detail_shm.png (needs revision with custom SHM allocation)
- replica_status_filter.png (needs FR-2904 build visible on backend; visible on local dev but the test backend snapshot lagged behind)

Captured at 2× zoom via Portless dev (https://docs-capture.localhost:1356) against isla-sorna test backend, per-locale via window.switchLanguage().

Author: yomybaby

packages/backend.ai-webui-docs/src/en/images/endpoint_detail_more_menu.png

@@ -309,7 +309,6 @@ Each deployment can hold many revisions. Only one revision is *current* (serving
 Click the `New Deployment` button on the Serving page to open the **Create Deployment** modal. The modal collects only deployment-level metadata; no revision is created at this point.
 
 ![](../images/model_serving_create_modal.png)
-<!-- TODO: Capture screenshot — FR-2822 deployment-only create modal -->
 
 The modal contains the following fields:
 
@@ -324,7 +323,6 @@ Click `Create Deployment` to create the deployment. You are then taken to the En
 A revision captures every setting needed to run the inference server — image, start command, resources, model mounts, and environment variables. From the Endpoint Detail Page, click `Add Revision` to open the modal.
 
 ![](../images/model_serving_add_revision_modal.png)
-<!-- TODO: Capture screenshot — redesigned Add Revision modal -->
 
 The modal contains:
 
@@ -536,7 +534,6 @@ The Endpoint Detail Page shows contextual alert banners at the top, reflecting t
 - **Private deployment — use an access token to access the endpoint.**: Shown when **Open To Public** is disabled. Includes a shortcut to **Manage Access Tokens** so you can issue or copy a token. See [Access Tokens](#generating-tokens).
 
 ![](../images/endpoint_detail_private_alert.png)
-<!-- TODO: Capture screenshot — Private deployment alert with access-token shortcut -->
 
 - **No revision is deployed — add a revision to activate this service.**: Shown when the deployment has no current revision. Click `Add Revision` to create the first revision and activate the service.
 
@@ -563,7 +560,6 @@ The Service Info card displays the following details:
 - **Image**: The container image used for the service.
 
 ![](../images/endpoint_detail_visibility.png)
-<!-- TODO: Capture screenshot — Visibility row with Public/Private tag and Deployment ID -->
 
 ![](../images/endpoint_detail_shm.png)
 <!-- TODO: Capture screenshot — SHM displayed in endpoint detail config -->
@@ -573,7 +569,6 @@ The Service Info card displays the following details:
 The Service Info card's header exposes an **Edit** button alongside a **More** menu. The More menu currently contains the **Delete Deployment** action.
 
 ![](../images/endpoint_detail_more_menu.png)
-<!-- TODO: Capture screenshot — More menu containing Delete action -->
 
 The delete and trash icons across the Model Serving pages follow a strict convention:
 
@@ -611,7 +606,6 @@ If a replica has encountered an error, clicking the error indicator on the row o
 The Revisions tab lists every revision that has been added to the deployment, ordered by revision number.
 
 ![](../images/revision_history_tab.png)
-<!-- TODO: Capture screenshot — revision history with revision number column + filter/sort -->
 
 Columns include: