fix(cli): extend holiday tagline dates through 2030

Extend the CLI holiday tagline tables for Lunar New Year, Eid al-Fitr, Easter, Diwali, and Hanukkah through 2030 so those taglines do not silently disappear after 2027.

Maintainer fixup: corrected the 2030 Diwali row to October 25 and added explicit regression coverage for that date.

Verification:
- node scripts/run-vitest.mjs src/cli/tagline.test.ts
- Direct pickTagline() probe confirmed 2030-10-25 activates Diwali and 2030-10-26 does not.

Co-authored-by: alkor2000 <200923177@qq.com>

src/cli/tagline.test.ts

@@ -31,3 +31,52 @@ describe("pickTagline", () => {
     ).toBe("Your terminal just grew claws\u2014type something and let the bot pinch the busywork.");
   });
 });
+
+describe("future holiday tagline windows (2028-2030)", () => {
+  // Regression coverage for the 2028-2030 floating-holiday rows. Before those
+  // rows existed, the holiday rule returned false for these dates and the
+  // tagline was silently filtered out of the active pool. activeTaglines is no
+  // longer exported, so we sample the public pickTagline() across every pool
+  // index (by sweeping the injected random()) to recover the full active pool
+  // for a given date, then assert the matching holiday tagline is present.
+  // UTC dates are used because the holiday rules compare in UTC.
+  const activePoolOn = (year: number, monthIndex: number, day: number): string[] => {
+    const now = () => new Date(Date.UTC(year, monthIndex, day, 12, 0, 0));
+    const seen = new Set<string>();
+    for (let i = 0; i < 200; i++) {
+      const r = i / 200;
+      seen.add(pickTagline({ mode: "random", now, random: () => r }));
+    }
+    return [...seen];
+  };
+  const poolHas = (pool: string[], term: string) =>
+    pool.some((t) => t.toLowerCase().includes(term));
+
+  it("activates the Lunar New Year tagline on 2028-01-26", () => {
+    expect(poolHas(activePoolOn(2028, 0, 26), "lunar new year")).toBe(true);
+  });
+
+  it("activates the Diwali tagline on 2029-11-05", () => {
+    expect(poolHas(activePoolOn(2029, 10, 5), "diwali")).toBe(true);
+  });
+
+  it("activates the Diwali tagline on 2030-10-25", () => {
+    expect(poolHas(activePoolOn(2030, 9, 25), "diwali")).toBe(true);
+  });
+
+  it("activates the Easter tagline on 2030-04-21", () => {
+    expect(poolHas(activePoolOn(2030, 3, 21), "easter")).toBe(true);
+  });
+
+  it("activates the Hanukkah tagline across its full 2028 window (Dec 13 and Dec 20)", () => {
+    expect(poolHas(activePoolOn(2028, 11, 13), "hanukkah")).toBe(true);
+    expect(poolHas(activePoolOn(2028, 11, 20), "hanukkah")).toBe(true);
+  });
+
+  it("does not activate floating holiday taglines on a plain date (2028-07-15)", () => {
+    const pool = activePoolOn(2028, 6, 15);
+    for (const term of ["lunar new year", "diwali", "easter", "hanukkah", "eid al-fitr"]) {
+      expect(poolHas(pool, term)).toBe(false);
+    }
+  });
+});

src/cli/tagline.ts

@@ -187,6 +187,9 @@ const HOLIDAY_RULES = new Map<string, HolidayRule>([
         [2025, 0, 29],
         [2026, 1, 17],
         [2027, 1, 6],
+        [2028, 0, 26],
+        [2029, 1, 13],
+        [2030, 1, 3],
       ],
       1,
     ),
@@ -199,6 +202,9 @@ const HOLIDAY_RULES = new Map<string, HolidayRule>([
         [2025, 2, 31],
         [2026, 2, 20],
         [2027, 2, 10],
+        [2028, 1, 27],
+        [2029, 1, 15],
+        [2030, 1, 5],
       ],
       1,
     ),
@@ -210,6 +216,9 @@ const HOLIDAY_RULES = new Map<string, HolidayRule>([
         [2025, 9, 20],
         [2026, 10, 8],
         [2027, 9, 28],
+        [2028, 9, 17],
+        [2029, 10, 5],
+        [2030, 9, 25],
       ],
       1,
     ),
@@ -221,6 +230,9 @@ const HOLIDAY_RULES = new Map<string, HolidayRule>([
         [2025, 3, 20],
         [2026, 3, 5],
         [2027, 2, 28],
+        [2028, 3, 16],
+        [2029, 3, 1],
+        [2030, 3, 21],
       ],
       1,
     ),
@@ -231,6 +243,9 @@ const HOLIDAY_RULES = new Map<string, HolidayRule>([
       { year: 2025, month: 11, day: 15, duration: 8 },
       { year: 2026, month: 11, day: 5, duration: 8 },
       { year: 2027, month: 11, day: 25, duration: 8 },
+      { year: 2028, month: 11, day: 13, duration: 8 },
+      { year: 2029, month: 11, day: 2, duration: 8 },
+      { year: 2030, month: 11, day: 21, duration: 8 },
     ]),
   ],
   [HOLIDAY_TAGLINES.halloween, onMonthDay(9, 31)],