feat(dashboard): warn on source cards when a portal subscription expires soon

Dashboard source cards now carry a passive expiry chip: amber "Expires in
N d" within 7 days of the subscription lapsing, error-toned "Expired" once
it has. Account details stay behind the card's ⋮ → Account info.

Xtream expirations ride on the playlist switcher's cached PortalStatusService
check — checkPortalStatusDetails() now surfaces the parsed exp_date from the
same round-trip, so the dashboard adds no extra portal calls. Stalker
expirations come from the stalkerAccountInfo snapshot persisted at import;
it lives in the playlist payload (meta rows carry payload: null), so each
Stalker source costs one full-playlist read memoized on the playlist's
update timestamp.

New i18n keys added to all 19 locales via the i18n-fill merger.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

libs/shared/interfaces/src/lib/xtream-portal.utils.spec.ts

@@ -1,6 +1,7 @@
 import {
     extractXtreamCredentialsFromUrl,
     normalizeXtreamServerUrl,
+    resolveXtreamPortalExpiration,
     resolveXtreamPortalStatus,
 } from './xtream-portal.utils';
 
@@ -104,4 +105,39 @@ describe('xtream portal utilities', () => {
             ).toBe('expired');
         });
     });
+
+    describe('resolveXtreamPortalExpiration', () => {
+        it('parses numeric-string exp_date into unix seconds', () => {
+            expect(
+                resolveXtreamPortalExpiration({
+                    user_info: { exp_date: '1790000000' },
+                })
+            ).toBe(1_790_000_000);
+        });
+
+        it('treats unlimited and absent expirations as null', () => {
+            expect(
+                resolveXtreamPortalExpiration({
+                    user_info: { exp_date: '0' },
+                })
+            ).toBeNull();
+            expect(
+                resolveXtreamPortalExpiration({
+                    user_info: { exp_date: '' },
+                })
+            ).toBeNull();
+            expect(
+                resolveXtreamPortalExpiration({ user_info: {} })
+            ).toBeNull();
+            expect(resolveXtreamPortalExpiration(null)).toBeNull();
+        });
+
+        it('rejects non-numeric exp_date values', () => {
+            expect(
+                resolveXtreamPortalExpiration({
+                    user_info: { exp_date: 'never' },
+                })
+            ).toBeNull();
+        });
+    });
 });

libs/shared/interfaces/src/lib/xtream-portal.utils.ts

@@ -102,6 +102,17 @@ export function resolveXtreamPortalStatus(
     return 'active';
 }
 
+/**
+ * Reads the account expiration from an Xtream `get_account_info`-style
+ * response as unix seconds. Returns null when the portal doesn't report one
+ * (unlimited accounts answer with empty/zero/absent `exp_date`).
+ */
+export function resolveXtreamPortalExpiration(
+    response: XtreamPortalStatusResponseLike | null | undefined
+): number | null {
+    return parseXtreamExpiration(response?.user_info?.exp_date);
+}
+
 function normalizeAuthValue(
     value: boolean | number | string | null | undefined
 ): boolean | null {