Refactor birdseye activity modes as a list and add alerts/detections (#24012)

* backend

* tests

* frontend and i18n

* e2e test schema

* docs

docs/docs/configuration/advanced/reference.md

@@ -252,16 +252,14 @@ birdseye:
   # 1 is the highest quality, and 31 is the lowest. Lower quality feeds utilize less CPU resources.
   quality: 8
   # Optional: Activity types that include cameras in Birdseye (default: shown below)
-  # Multiple activity types can be enabled at the same time.
-  mode:
-    # Optional: All cameras are included always (default: shown below)
-    continuous: False
-    # Optional: Cameras are included if motion was detected in the last 30 seconds (default: shown below)
-    motion: False
-    # Optional: Cameras are included if they have had an active tracked object within the last 30 seconds (default: shown below)
-    objects: True
-    # Optional: Cameras are included while they have a stationary tracked object (default: shown below)
-    stationary_objects: False
+  # Multiple activity types can be listed at the same time.
+  #   continuous:  all cameras are included always
+  #   motion:      included if motion was detected within the inactivity threshold
+  #   all_objects: included if a tracked object was present within the inactivity threshold
+  #   alerts:      included while an alert review item is in progress
+  #   detections:  included while a detection review item is in progress
+  modes:
+    - all_objects
   # Optional: Threshold for camera activity to stop showing camera (default: shown below)
   inactivity_threshold: 30
   # Optional: Configure the birdseye layout

docs/docs/configuration/birdseye.md

@@ -20,12 +20,15 @@ Each camera tile in Birdseye is composed from the frames of the stream assigned
 
 ### Birdseye Activity Types
 
-Birdseye offers independent activity types that control when cameras are shown. Multiple activity types can be enabled together.
+Birdseye offers independent activity types that control when cameras are shown. Multiple activity types can be listed together.
 
 - **continuous:** The camera is always included
 - **motion:** The camera is included when motion was detected within the last 30 seconds
-- **objects:** The camera is included when an active object was tracked within the last 30 seconds
-- **stationary_objects:** The camera is included while a stationary object is tracked
+- **all_objects:** The camera is included when a tracked object is present, active or stationary
+- **alerts:** The camera is included while an alert review item is in progress
+- **detections:** The camera is included while a detection review item is in progress
+
+`alerts` and `detections` follow the review item's own lifetime, so the camera is removed as soon as the review item ends. Which objects qualify for each is set in [review configuration](./review.md).
 
 ### Custom Birdseye Icon
 
@@ -50,20 +53,19 @@ To include a camera in Birdseye view only for specific circumstances, or exclude
 </TabItem>
 <TabItem value="yaml">
 
-```yaml {8-11,13-15}
+```yaml {10-12,15-16}
 # Include all cameras by default in Birdseye view
 birdseye:
   enabled: True
-  mode:
-    continuous: True
+  modes:
+    - continuous
 
 cameras:
   front:
-    # Only include the "front" camera in Birdseye view when objects are detected
+    # Only include the "front" camera in Birdseye view when an alert is in progress
     birdseye:
-      mode:
-        continuous: False
-        objects: True
+      modes:
+        - alerts
   back:
     # Exclude the "back" camera from Birdseye view
     birdseye:
@@ -75,7 +77,7 @@ cameras:
 
 ### Birdseye Inactivity
 
-By default birdseye shows all cameras that have had the configured activity in the last 30 seconds. This threshold can be configured.
+By default birdseye shows all cameras that have had the configured activity in the last 30 seconds. This threshold can be configured, and applies to the `motion` and `all_objects` activity types only.
 
 <ConfigTabs>
 <TabItem value="ui">
@@ -144,7 +146,8 @@ Navigate to <NavPath path="Settings > System > Birdseye" /> and in the **Camera
 # Include all cameras by default in Birdseye view
 birdseye:
   enabled: True
-  mode: continuous
+  modes:
+    - continuous
 
 cameras:
   front: