feat: show New Task button on all tabs

Removed the switchTab() logic that hid btn-new-task on non-tasks tabs.
The button lives in the global header so no structural changes were needed.
Added new-task-button.test.mjs to contract-test the always-visible behavior.

1 files changed, 24 insertions, 0 deletions

diff --git a/web/test/new-task-button.test.mjs b/web/test/new-task-button.test.mjs
new file mode 100644
index 0000000..45a3548
--- /dev/null
+++ b/web/test/new-task-button.test.mjs
@@ -0,0 +1,24 @@
+// new-task-button.test.mjs — visibility contract for the New Task button
+//
+// The New Task button lives in the global header and must be visible on all tabs.
+// Run with: node --test web/test/new-task-button.test.mjs
+
+import { describe, it } from 'node:test';
+import assert from 'node:assert/strict';
+import { newTaskButtonShouldShowOnTab } from '../app.js';
+
+const ALL_TABS = ['tasks', 'active', 'running', 'stats'];
+
+describe('new task button visibility', () => {
+  for (const tab of ALL_TABS) {
+    it(`is visible on "${tab}" tab`, () => {
+      assert.equal(newTaskButtonShouldShowOnTab(tab), true, `expected button to be visible on tab "${tab}"`);
+    });
+  }
+
+  it('is visible on any unknown future tab', () => {
+    assert.equal(newTaskButtonShouldShowOnTab('help'), true);
+    assert.equal(newTaskButtonShouldShowOnTab('templates'), true);
+    assert.equal(newTaskButtonShouldShowOnTab(''), true);
+  });
+});