feat: 支持配置渠道被禁用后是否清空渠道粘性 (#5306)

* fix: evict stale channel affinity

* feat: configure disabled channel affinity retention

---------

Co-authored-by: Seefs <i@seefs.me>

web/default/src/features/system-settings/general/channel-affinity/index.tsx

@@ -100,6 +100,9 @@ export function ChannelAffinitySection(props: Props) {
   const [switchOnSuccess, setSwitchOnSuccess] = useState(
     props.defaultValues['channel_affinity_setting.switch_on_success']
   )
+  const [keepOnChannelDisabled, setKeepOnChannelDisabled] = useState(
+    props.defaultValues['channel_affinity_setting.keep_on_channel_disabled']
+  )
   const [maxEntries, setMaxEntries] = useState(
     props.defaultValues['channel_affinity_setting.max_entries']
   )
@@ -136,6 +139,9 @@ export function ChannelAffinitySection(props: Props) {
     setSwitchOnSuccess(
       props.defaultValues['channel_affinity_setting.switch_on_success']
     )
+    setKeepOnChannelDisabled(
+      props.defaultValues['channel_affinity_setting.keep_on_channel_disabled']
+    )
     setMaxEntries(props.defaultValues['channel_affinity_setting.max_entries'])
     setDefaultTtl(
       props.defaultValues['channel_affinity_setting.default_ttl_seconds']
@@ -231,6 +237,14 @@ export function ChannelAffinitySection(props: Props) {
           key: 'channel_affinity_setting.switch_on_success',
           value: String(switchOnSuccess),
         })
+      if (
+        keepOnChannelDisabled !==
+        props.defaultValues['channel_affinity_setting.keep_on_channel_disabled']
+      )
+        updates.push({
+          key: 'channel_affinity_setting.keep_on_channel_disabled',
+          value: String(keepOnChannelDisabled),
+        })
       if (
         maxEntries !==
         props.defaultValues['channel_affinity_setting.max_entries']
@@ -397,6 +411,14 @@ export function ChannelAffinitySection(props: Props) {
             'If the affinity channel fails and retry succeeds on another channel, update affinity to the successful channel.'
           )}
         />
+        <SettingsSwitchField
+          checked={keepOnChannelDisabled}
+          onCheckedChange={setKeepOnChannelDisabled}
+          label={t('Keep affinity when channel is disabled')}
+          description={t(
+            'When enabled, keep the affinity entry even if the affinity channel is disabled or no longer usable for the current group/model. Leave it off to delete the entry and select another channel.'
+          )}
+        />
 
         <Separator />
 

web/default/src/features/system-settings/general/channel-affinity/types.ts

@@ -50,6 +50,7 @@ export interface CacheStats {
 export interface ChannelAffinitySettings {
   'channel_affinity_setting.enabled': boolean
   'channel_affinity_setting.switch_on_success': boolean
+  'channel_affinity_setting.keep_on_channel_disabled': boolean
   'channel_affinity_setting.max_entries': number
   'channel_affinity_setting.default_ttl_seconds': number
   'channel_affinity_setting.rules': string