style(mobile): align history pagination buttons

projects/xiaoshu-mobile/src/app/features/study-records/study-records-page.component.scss

@@ -64,10 +64,9 @@
 .record-actions { display: flex; flex-shrink: 0; align-items: center; gap: 8px; }
 .record-actions > button, .record-empty button { min-height: 34px; padding: 0 11px; color: var(--brand-strong); background: var(--brand-pale); border: 1px solid color-mix(in srgb, var(--brand) 32%, var(--line)); border-radius: var(--radius-sm); font-size: 11px; font-weight: 650; }
 .record-list { background: white; }
-.record-pagination { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); align-items: center; padding: 14px 16px; background: var(--surface-muted); border-top: 1px solid var(--line); gap: 12px; }
+.record-pagination { display: grid; grid-template-columns: 96px auto 96px; align-items: center; justify-content: center; padding: 14px 16px; background: var(--surface-muted); border-top: 1px solid var(--line); gap: 12px; }
 .record-pagination > span { color: var(--ink-soft); font-size: 12px; font-weight: 700; white-space: nowrap; }
 .record-pagination > button { display: inline-flex; min-height: 38px; align-items: center; justify-content: center; padding: 0 12px; color: var(--brand-strong); background: white; border: 1px solid color-mix(in srgb, var(--brand) 28%, var(--line)); border-radius: var(--radius-sm); font-size: 12px; font-weight: 750; gap: 4px; }
-.record-pagination > button:last-child { justify-self: end; }
 .record-pagination > button:disabled { color: var(--ink-faint); background: color-mix(in srgb, white 72%, var(--surface-muted)); border-color: var(--line); cursor: not-allowed; }
 .learning-record-card .learning-item:last-child { border-bottom: 0; }
 .schedule-plan-list { background: #fbfdfc; border-top: 1px solid var(--line); }