fix(dashboard): treat description and category corrections as changed answers

The hero renders a live programme's description and category (#1738), so
sameLiveEpgAnswers must compare them too; otherwise a guide correction to
either was dropped by distinctUntilChanged until the programme changed.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

libs/workspace/dashboard/feature/src/lib/rails/dashboard-live-epg.utils.spec.ts

@@ -3,6 +3,7 @@ import {
     buildDashboardLiveEpgDetails,
     calcEpgProgress,
     formatEpgTimeRange,
+    sameLiveEpgAnswers,
 } from './dashboard-live-epg.utils';
 
 // Local-time wall clock so the formatted range is stable in every timezone
@@ -143,4 +144,35 @@ describe('dashboard-live-epg.utils', () => {
             expect(buildDashboardLiveEpgDetails(row, MIDPOINT_MS)).toBeNull();
         });
     });
+
+    describe('sameLiveEpgAnswers', () => {
+        const answers = (row: EpgProgram | null) =>
+            new Map<string, EpgProgram | null>([['key', row]]);
+
+        it('treats fresh objects with the same rendered fields as unchanged', () => {
+            expect(
+                sameLiveEpgAnswers(answers(program()), answers(program()))
+            ).toBe(true);
+        });
+
+        it.each([
+            ['title', { title: 'Late News' }],
+            ['description', { desc: 'Corrected summary' }],
+            ['category', { category: 'Sport' }],
+            ['stop', { stop: new Date(2026, 0, 15, 21, 30).toISOString() }],
+        ])('sees a guide correction to the %s', (_, change) => {
+            expect(
+                sameLiveEpgAnswers(
+                    answers(program()),
+                    answers(program(change as Partial<EpgProgram>))
+                )
+            ).toBe(false);
+        });
+
+        it('sees a programme appear or disappear', () => {
+            expect(sameLiveEpgAnswers(answers(null), answers(program()))).toBe(
+                false
+            );
+        });
+    });
 });

libs/workspace/dashboard/feature/src/lib/rails/dashboard-live-epg.utils.ts

@@ -282,7 +282,11 @@ export function liveEpgAnswersNeedRefresh(
     return false;
 }
 
-/** Same keys answered with the same programmes (by time and title). */
+/**
+ * Same keys answered with the same programmes: everything the dashboard
+ * renders from one (title, times, description, category) must match, or a
+ * guide correction to any of them would be dropped as "unchanged".
+ */
 export function sameLiveEpgAnswers(
     a: ReadonlyMap<string, EpgProgram | null>,
     b: ReadonlyMap<string, EpgProgram | null>
@@ -297,6 +301,8 @@ export function sameLiveEpgAnswers(
             !program ||
             !other ||
             program.title !== other.title ||
+            program.desc !== other.desc ||
+            program.category !== other.category ||
             epgTimestampMs(program, 'start') !==
                 epgTimestampMs(other, 'start') ||
             epgTimestampMs(program, 'stop') !== epgTimestampMs(other, 'stop')