Fill substituted timetable cells to the row height

apps/web/src/routes/timetable/+page.svelte

@@ -147,7 +147,9 @@ function getPeriodLabel(period: number): string {
 
 // Padding lives on the inner box, not the cell, so the editing button can fill
 // the cell and still measure the same as the static view. The substituted wash
-// lives there too, compositing onto --card instead of the gap's --border fill.
+// lives on the cell itself — the inner box only sizes to its content, so a
+// dash next to a two-line subject would otherwise leave a --card gap at the
+// bottom of the row.
 const CELL_PAD = 'py-3 sm:py-6 px-1';
 const REPLACED_BG = 'bg-amber-100/70 dark:bg-amber-900/20';
 
@@ -321,7 +323,7 @@ async function writeSlot(subject: string, teacher: string) {
 							<div
 								role="cell"
 								data-replaced={slot?.replaced ? '' : undefined}
-								class="p-0 text-center bg-card"
+								class="p-0 text-center flex flex-col {slot?.replaced ? REPLACED_BG : 'bg-card'}"
 							>
 								<!-- The whole cell is the hit area while editing, so what
 								     is pressed is exactly what opens. -->
@@ -330,10 +332,10 @@ async function writeSlot(subject: string, teacher: string) {
 										type="button"
 										onclick={() => openSlotEditor(d, i + 1)}
 										aria-label="{dayName}요일 {i + 1}교시 수정"
-										class="block w-full {CELL_PAD} cursor-pointer transition-colors duration-150 pointer:hover:bg-muted {slot?.replaced ? REPLACED_BG : ''}"
+										class="block w-full flex-1 {CELL_PAD} cursor-pointer transition-colors duration-150 pointer:hover:bg-muted"
 									>{@render cell(slot)}</button>
 								{:else}
-									<div class="{CELL_PAD} {slot?.replaced ? REPLACED_BG : ''}">{@render cell(slot)}</div>
+									<div class="flex-1 {CELL_PAD}">{@render cell(slot)}</div>
 								{/if}
 							</div>
 						{/each}

packages/backend/convex/config.ts

@@ -72,7 +72,7 @@ export const DINNER_END_HOUR = 19;
 export const HOME_EVENT_WINDOW_DAYS = 7;
 
 // How many D-day countdowns the home hero shows before it stops being a hero.
-export const HOME_DDAY_LIMIT = 3;
+export const HOME_DDAY_LIMIT = 2;
 
 // Long enough to jump a summer break, in both directions: forward to find the
 // next school day, backward to find the 방학 marker that started a break

packages/backend/convex/schedule.test.ts

@@ -179,7 +179,7 @@ describe("schedule D-days", () => {
       today: THU,
       afterRollover: false,
     });
-    expect(ddays.map((e) => e.date)).toEqual(["20260825", "20260830", "20260901"]);
+    expect(ddays.map((e) => e.date)).toEqual(["20260825", "20260830"]);
   });
 
   // A sync deletes and re-inserts every school row in the range, so a flag set