fix(portals): read the year with one rule everywhere

The shared detail path fed the chip `meta.year`, which the adapter built
with a fixed-prefix fallback: a day-first `31-03-1999` became `31-0`, so
that path both displayed the wrong label and lost the facet, since the
guard could not parse it back.

`parseFacetYear()` moves to shared/interfaces and both callers delegate
to it, so the adapters and the Discover chips cannot drift into
disagreeing about what a date says. The adapter keeps its date-parse
fallback for shapes stating no four-digit run, but no longer invents one
by slicing.

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

libs/portal/shared/util/src/lib/navigation/discover-facet-navigation.ts

@@ -4,7 +4,7 @@ import {
     TmdbCountryFacet,
     TmdbGenreFacet,
     TmdbMediaType,
-    isTmdbYearFacet,
+    parseFacetYear,
 } from '@iptvnator/shared/interfaces';
 import { discoverLink } from './discover-link.util';
 
@@ -33,19 +33,6 @@ export interface DiscoverFacetNavigation {
     openCountry(country: TmdbCountryFacet): void;
 }
 
-/**
- * Year stated by a provider date field, whatever shape it arrives in —
- * `1976`, `1999-03-31` and `31-03-1999` all resolve. Reads the first
- * four-digit run rather than a fixed slice, which the day-first form
- * would otherwise turn into `NaN`, and rejects the `0000-00-00`
- * placeholder rather than offering a chip that filters by nothing.
- */
-function facetYear(releaseDate: string | null | undefined): number | null {
-    const match = releaseDate?.match(/\d{4}/);
-    const year = match ? Number(match[0]) : null;
-    return year !== null && isTmdbYearFacet(year) ? year : null;
-}
-
 /**
  * Shared behavior behind the clickable year/genre/country chips on every
  * detail page. Call it from a field initializer (injection context).
@@ -80,16 +67,16 @@ export function createDiscoverFacetNavigation(
     };
 
     const canOpenYear = (releaseDate: string | null | undefined): boolean =>
-        target() !== null && facetYear(releaseDate) !== null;
+        target() !== null && parseFacetYear(releaseDate) !== null;
 
     return {
         yearLabel(releaseDate) {
-            const year = facetYear(releaseDate);
+            const year = parseFacetYear(releaseDate);
             return year === null ? null : String(year);
         },
         canOpenYear,
         openYear(releaseDate) {
-            const year = facetYear(releaseDate);
+            const year = parseFacetYear(releaseDate);
             if (year !== null) {
                 navigate({ kind: 'year', year });
             }

libs/shared/interfaces/src/lib/tmdb.interface.ts

@@ -131,6 +131,23 @@ export function isTmdbYearFacet(year: number): boolean {
     return Number.isInteger(year) && year >= 1000 && year <= 9999;
 }
 
+/**
+ * The year stated by a provider date field, whatever shape it arrives in
+ * — `1976`, `1999-03-31` and `31-03-1999` all resolve to the same year.
+ *
+ * Reads the first four-digit run rather than a fixed prefix: slicing
+ * turns a day-first date into `31-0`, which is both the wrong label and
+ * an unusable filter. Lives here so the Discover chips and the detail
+ * adapters cannot drift into disagreeing about what a date says.
+ */
+export function parseFacetYear(
+    releaseDate: string | null | undefined
+): number | null {
+    const match = releaseDate?.match(/\d{4}/);
+    const year = match ? Number(match[0]) : null;
+    return year !== null && isTmdbYearFacet(year) ? year : null;
+}
+
 /**
  * One cached TMDB lookup. Two kinds of rows share the table, discriminated
  * by the `lookupKey` prefix:

libs/shared/interfaces/src/lib/vod-details-adapters.spec.ts

@@ -1,4 +1,75 @@
-import { youtubeEmbedUrl } from './vod-details-adapters';
+import {
+    normalizeStalkerVod,
+    normalizeXtreamVod,
+    youtubeEmbedUrl,
+} from './vod-details-adapters';
+
+describe('normalized release year', () => {
+    const stalker = (releasedate: string) =>
+        normalizeStalkerVod({
+            id: '1',
+            cmd: '',
+            info: {
+                movie_image: '',
+                description: '',
+                name: 'Film',
+                actors: '',
+                director: '',
+                releasedate,
+                genre: '',
+                rating_imdb: '',
+                rating_kinopoisk: '',
+            },
+        }).year;
+
+    it('reads the year out of a day-first provider date', () => {
+        // A fixed prefix renders '31-0' here, which is both the wrong
+        // label and a year the Discover chip cannot filter by
+        expect(stalker('31-03-1999')).toBe('1999');
+    });
+
+    it('keeps reading ordinary date shapes', () => {
+        expect(stalker('1976')).toBe('1976');
+        expect(stalker('1999-03-31')).toBe('1999');
+        expect(
+            normalizeXtreamVod({
+                info: {
+                    kinopoisk_url: '',
+                    tmdb_id: 0,
+                    name: 'Film',
+                    o_name: '',
+                    cover_big: '',
+                    movie_image: '',
+                    releasedate: '2018-05-01',
+                    episode_run_time: 0,
+                    youtube_trailer: '',
+                    director: '',
+                    actors: '',
+                    cast: '',
+                    description: '',
+                    plot: '',
+                    age: '',
+                    mpaa_rating: '',
+                    rating_count_kinopoisk: 0,
+                    country: '',
+                    genre: '',
+                    backdrop_path: [],
+                    duration_secs: 0,
+                    duration: '',
+                    video: [],
+                    audio: [],
+                    bitrate: 0,
+                    rating: 0,
+                },
+            }).year
+        ).toBe('2018');
+    });
+
+    it('states no year for a placeholder or unusable date', () => {
+        expect(stalker('0000-00-00')).toBeUndefined();
+        expect(stalker('')).toBeUndefined();
+    });
+});
 
 describe('youtubeEmbedUrl', () => {
     it('builds an embed URL from a plain video id (TMDB format)', () => {

libs/shared/interfaces/src/lib/vod-details-adapters.ts

@@ -1,5 +1,6 @@
 import { XtreamVodDetails, getXtreamVodInfo } from './xtream-vod-details.interface';
 import { StalkerVodDetails } from './stalker-vod-details.interface';
+import { parseFacetYear } from './tmdb.interface';
 import {
     NormalizedVodMeta,
     VodDetailsItem,
@@ -170,24 +171,28 @@ export function getVodNumericId(item: VodDetailsItem): number {
 // ============ Helper Functions ============
 
 /**
- * Extracts 4-digit year from various date formats.
+ * Extracts the 4-digit year from the various date formats providers send.
+ *
+ * Delegates to the shared facet parser so the displayed year and the
+ * Discover chip built from it cannot disagree — the old fixed-prefix
+ * fallback turned a day-first `31-03-1999` into `31-0`, which is both
+ * the wrong label and an unusable filter. The date-parse fallback stays
+ * for shapes stating no four-digit run of their own.
  */
 function extractYear(dateString?: string): string | undefined {
     if (!dateString) return undefined;
 
-    // Try to extract 4-digit year from beginning
-    const yearMatch = dateString.match(/^(\d{4})/);
-    if (yearMatch) {
-        return yearMatch[1];
+    const facetYear = parseFacetYear(dateString);
+    if (facetYear !== null) {
+        return String(facetYear);
     }
 
-    // Try to parse as date and extract year
     const date = new Date(dateString);
     if (!isNaN(date.getTime())) {
         return date.getFullYear().toString();
     }
 
-    return dateString.slice(0, 4);
+    return undefined;
 }
 
 /**