test: Phase 5 — 添加 12 个测试文件 (+209 tests, 1177 total)

新增覆盖: effort, tokenBudget, displayTags, taggedId,
controlMessageCompat, MCP normalization/envExpansion,
gitConfigParser, formatBriefTimestamp, hyperlink, windowsPaths, notebook

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/utils/__tests__/formatBriefTimestamp.test.ts

@@ -0,0 +1,76 @@
+import { describe, expect, test } from "bun:test";
+import { formatBriefTimestamp } from "../formatBriefTimestamp";
+
+describe("formatBriefTimestamp", () => {
+  // Fixed "now" for deterministic tests: 2026-04-02T14:00:00Z (Thursday)
+  const now = new Date("2026-04-02T14:00:00Z");
+
+  test("same day timestamp returns time only (contains colon)", () => {
+    const result = formatBriefTimestamp("2026-04-02T10:30:00Z", now);
+    expect(result).toContain(":");
+    // Should NOT contain a weekday name since it's the same day
+    expect(result).not.toMatch(
+      /Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday/
+    );
+  });
+
+  test("yesterday returns weekday and time", () => {
+    // 2026-04-01 is Wednesday
+    const result = formatBriefTimestamp("2026-04-01T16:15:00Z", now);
+    expect(result).toContain("Wednesday");
+    expect(result).toContain(":");
+  });
+
+  test("3 days ago returns weekday and time", () => {
+    // 2026-03-30 is Monday
+    const result = formatBriefTimestamp("2026-03-30T09:00:00Z", now);
+    expect(result).toContain("Monday");
+    expect(result).toContain(":");
+  });
+
+  test("6 days ago returns weekday and time (still within 6-day window)", () => {
+    // 2026-03-27 is Friday
+    const result = formatBriefTimestamp("2026-03-27T12:00:00Z", now);
+    expect(result).toContain("Friday");
+    expect(result).toContain(":");
+  });
+
+  test("7+ days ago returns weekday, month, day, and time", () => {
+    // 2026-03-20 is Friday, 13 days ago
+    const result = formatBriefTimestamp("2026-03-20T14:30:00Z", now);
+    expect(result).toContain("Friday");
+    expect(result).toContain(":");
+    // Should contain month abbreviation (Mar)
+    expect(result).toMatch(/Mar/);
+  });
+
+  test("much older date returns full format with month", () => {
+    const result = formatBriefTimestamp("2025-12-25T08:00:00Z", now);
+    expect(result).toContain(":");
+    expect(result).toMatch(/Dec/);
+  });
+
+  test("invalid ISO string returns empty string", () => {
+    expect(formatBriefTimestamp("not-a-date", now)).toBe("");
+  });
+
+  test("empty string returns empty string", () => {
+    expect(formatBriefTimestamp("", now)).toBe("");
+  });
+
+  test("same day early morning returns time format", () => {
+    const result = formatBriefTimestamp("2026-04-02T01:05:00Z", now);
+    expect(result).toContain(":");
+    // Should be time-only format
+    expect(result.length).toBeLessThan(20);
+  });
+
+  test("uses current time as default when now is not provided", () => {
+    // Just verify it returns a non-empty string for a recent timestamp
+    const recent = new Date();
+    recent.setMinutes(recent.getMinutes() - 5);
+    const result = formatBriefTimestamp(recent.toISOString());
+    expect(result).not.toBe("");
+    expect(result).toContain(":");
+  });
+});