feat(linkedin-thought-leadership): v1.1.0 — Q2 2026 feature release

9 improvements across 3 tracks:

Onboarding: /linkedin:onboarding wizard, README Quick Start rewrite
Content Quality: voice drift scoring, industry angle variants,
  /linkedin:carousel, /linkedin:react multi-URL comparison
Analytics: automated week-rollover, day-of-week heatmap,
  month-over-month reports

25→27 commands. All Q2 ROADMAP items completed.

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

plugins/linkedin-thought-leadership/scripts/analytics/tests/heatmap.test.ts

@@ -0,0 +1,113 @@
+import { describe, test } from "node:test";
+import assert from "node:assert/strict";
+import { generateHeatmap } from "../src/reports/heatmap.js";
+import type { PostAnalytics } from "../src/models/types.js";
+
+function createPost(date: string, impressions: number, engagementRate: number): PostAnalytics {
+  return {
+    id: `post-${date}`,
+    title: `Post on ${date}`,
+    publishedDate: date,
+    metrics: {
+      impressions,
+      reactions: 10,
+      comments: 5,
+      shares: 2,
+      clicks: 3,
+      engagementRate,
+    },
+    importedAt: "2026-04-01T00:00:00Z",
+    exportSource: "test.csv",
+  };
+}
+
+describe("generateHeatmap", () => {
+  // Verified days: 2026-04-06=Mon, 07=Tue, 08=Wed, 09=Thu, 12=Sun, 13=Mon, 14=Tue, 15=Wed
+  const posts: PostAnalytics[] = [
+    createPost("2026-04-06", 1000, 3.0), // Monday
+    createPost("2026-04-07", 2000, 4.0), // Tuesday
+    createPost("2026-04-08", 1500, 3.5), // Wednesday
+    createPost("2026-04-13", 3000, 5.0), // Monday
+    createPost("2026-04-14", 2500, 4.5), // Tuesday
+    createPost("2026-04-12", 800, 2.0),  // Sunday
+  ];
+
+  test("groups posts by day of week correctly", () => {
+    const report = generateHeatmap(posts);
+    const monday = report.byDayOfWeek.find(d => d.dayName === "Monday");
+    const tuesday = report.byDayOfWeek.find(d => d.dayName === "Tuesday");
+    const sunday = report.byDayOfWeek.find(d => d.dayName === "Sunday");
+
+    assert.equal(monday?.postCount, 2);
+    assert.equal(tuesday?.postCount, 2);
+    assert.equal(sunday?.postCount, 1);
+  });
+
+  test("calculates correct averages per day", () => {
+    const report = generateHeatmap(posts);
+    const monday = report.byDayOfWeek.find(d => d.dayName === "Monday")!;
+    const tuesday = report.byDayOfWeek.find(d => d.dayName === "Tuesday")!;
+
+    assert.equal(monday.avgImpressions, 2000); // (1000+3000)/2
+    assert.equal(tuesday.avgImpressions, 2250); // (2000+2500)/2
+    assert.equal(monday.avgEngagementRate, 4.0); // (3.0+5.0)/2
+  });
+
+  test("handles days with no posts", () => {
+    const report = generateHeatmap(posts);
+    const friday = report.byDayOfWeek.find(d => d.dayName === "Friday")!;
+
+    assert.equal(friday.postCount, 0);
+    assert.equal(friday.avgImpressions, 0);
+    assert.equal(friday.avgEngagementRate, 0);
+  });
+
+  test("returns 7 entries ordered Mon-Sun", () => {
+    const report = generateHeatmap(posts);
+    assert.equal(report.byDayOfWeek.length, 7);
+    assert.equal(report.byDayOfWeek[0].dayName, "Monday");
+    assert.equal(report.byDayOfWeek[6].dayName, "Sunday");
+    assert.deepEqual(
+      report.byDayOfWeek.map(d => d.dayIndex),
+      [1, 2, 3, 4, 5, 6, 7]
+    );
+  });
+
+  test("identifies best day for impressions", () => {
+    const report = generateHeatmap(posts);
+    assert.equal(report.bestDayImpressions, "Tuesday");
+  });
+
+  test("identifies best day for engagement", () => {
+    const report = generateHeatmap(posts);
+    assert.equal(report.bestDayEngagement, "Tuesday"); // (4.0+4.5)/2 = 4.25
+  });
+
+  test("sets correct postsAnalyzed count", () => {
+    const report = generateHeatmap(posts);
+    assert.equal(report.postsAnalyzed, 6);
+  });
+
+  test("handles empty post list", () => {
+    const report = generateHeatmap([]);
+    assert.equal(report.postsAnalyzed, 0);
+    assert.equal(report.byDayOfWeek.length, 7);
+    assert.equal(report.bestDayImpressions, "N/A");
+    assert.equal(report.bestDayEngagement, "N/A");
+    for (const day of report.byDayOfWeek) {
+      assert.equal(day.postCount, 0);
+    }
+  });
+
+  test("identifies best post per day", () => {
+    const report = generateHeatmap(posts);
+    const monday = report.byDayOfWeek.find(d => d.dayName === "Monday")!;
+    assert.equal(monday.bestPost?.publishedDate, "2026-04-13"); // 3000 impressions
+  });
+
+  test("calculates correct date range", () => {
+    const report = generateHeatmap(posts);
+    assert.equal(report.dateRange.from, "2026-04-06");
+    assert.equal(report.dateRange.to, "2026-04-14");
+  });
+});