fix(cliproxy): tighten session affinity status handling

src/cliproxy/config/generator.ts

@@ -99,6 +99,8 @@ const MIN_STALE_HIGH_ONLY_GEMINI_MINOR_VERSIONS = 3;
 const MIN_STALE_GUESSED_GEMINI_AVERAGE_VARIANTS_PER_MINOR = 2;
 const LEGACY_GEMINI_STALE_ALIAS_MIGRATION_VERSION = 16;
 const MAX_LEGACY_MANUAL_GEMINI_MINOR_VERSION = 2;
+const GO_DURATION_SEGMENT = String.raw`(?:\d+(?:\.\d+)?(?:ns|us|µs|μs|ms|s|m|h))`;
+const GO_DURATION_PATTERN = new RegExp(`^${GO_DURATION_SEGMENT}+$`);
 
 /**
  * Get provider configuration
@@ -139,7 +141,7 @@ function getSessionAffinityEnabled(): boolean {
 
 function getSessionAffinityTtl(): string {
   const ttl = loadOrCreateUnifiedConfig().cliproxy?.routing?.session_affinity_ttl?.trim();
-  return ttl || '1h';
+  return ttl && GO_DURATION_PATTERN.test(ttl) ? ttl : '1h';
 }
 
 function sanitizeYamlScalar(rawValue: string): string {

ui/src/components/monitoring/proxy-status-widget.tsx

@@ -168,12 +168,20 @@ export function ProxyStatusWidget() {
   } = useCliproxySessionAffinity();
   const updateSessionAffinity = useUpdateCliproxySessionAffinity();
   const isSavingRoutingConfig = updateRouting.isPending || updateSessionAffinity.isPending;
-  const routingConfigError =
-    routingError instanceof Error
-      ? routingError
-      : sessionAffinityError instanceof Error
-        ? sessionAffinityError
-        : null;
+  const routingConfigError = routingError instanceof Error ? routingError : null;
+  const effectiveSessionAffinityState =
+    sessionAffinityState ??
+    (sessionAffinityError instanceof Error
+      ? {
+          source: 'unsupported' as const,
+          target: (routingState?.target ?? (isRemoteMode ? 'remote' : 'local')) as
+            | 'local'
+            | 'remote',
+          reachable: false,
+          manageable: false,
+          message: sessionAffinityError.message,
+        }
+      : undefined);
   const startProxy = useStartProxy();
   const stopProxy = useStopProxy();
   const restartProxy = useRestartProxy();
@@ -330,11 +338,11 @@ export function ProxyStatusWidget() {
         </div>
 
         <RoutingGuidanceCard
-          key={`remote:${routingState?.strategy ?? 'round-robin'}:${sessionAffinityState?.enabled ?? 'na'}:${sessionAffinityState?.ttl ?? 'na'}:${sessionAffinityState?.manageable ?? 'na'}`}
+          key={`remote:${routingState?.strategy ?? 'round-robin'}:${effectiveSessionAffinityState?.enabled ?? 'na'}:${effectiveSessionAffinityState?.ttl ?? 'na'}:${effectiveSessionAffinityState?.manageable ?? 'na'}`}
           compact
           className="mt-3"
           state={routingState}
-          sessionAffinityState={sessionAffinityState}
+          sessionAffinityState={effectiveSessionAffinityState}
           isLoading={routingLoading || sessionAffinityLoading}
           isSaving={isSavingRoutingConfig}
           error={routingConfigError}
@@ -488,11 +496,11 @@ export function ProxyStatusWidget() {
         </div>
 
         <RoutingGuidanceCard
-          key={`local:${routingState?.strategy ?? 'round-robin'}:${sessionAffinityState?.enabled ?? 'na'}:${sessionAffinityState?.ttl ?? 'na'}:${sessionAffinityState?.manageable ?? 'na'}`}
+          key={`local:${routingState?.strategy ?? 'round-robin'}:${effectiveSessionAffinityState?.enabled ?? 'na'}:${effectiveSessionAffinityState?.ttl ?? 'na'}:${effectiveSessionAffinityState?.manageable ?? 'na'}`}
           compact
           className="mt-3"
           state={routingState}
-          sessionAffinityState={sessionAffinityState}
+          sessionAffinityState={effectiveSessionAffinityState}
           isLoading={routingLoading || sessionAffinityLoading}
           isSaving={isSavingRoutingConfig}
           error={routingConfigError}