Fix some bugs on discover pages (#1832)

## Description
Fix some bugs on discover pages:
- UI fixes for available seasons
- Fix toggle not updating when removing a season from a pending request
- Don't request images if the path is null
- Better error handling when fetching ratings

### Related issues
Follow up to #1816

### Testing
Emulator

## Screenshots
N/A

## AI or LLM usage
None

app/src/main/seerr/seerr-api.yml

@@ -1304,6 +1304,12 @@ components:
           type: integer
           example: 0
           description: Availability of the media. 1 = `UNKNOWN`, 2 = `PENDING`, 3 = `PROCESSING`, 4 = `PARTIALLY_AVAILABLE`, 5 = `AVAILABLE`, 6 = `DELETED`
+        seasons:
+          type: array
+          readOnly: true
+          nullable: true
+          items:
+            $ref: '#/components/schemas/Season'
         requests:
           type: array
           readOnly: true