Add host temperature telemetry and history

tests/unit/ui-capacity.test.ts

@@ -43,6 +43,7 @@ const host = (changes: Partial<CapacityHost> = {}): CapacityHost => ({
     ...changes
 });
 const history: CapacityHistory = {
+    temperatures: [],
     range: '24h',
     startAt: 1000,
     endAt: 5000,
@@ -112,6 +113,10 @@ it('keeps current estimates and host comparison before history with scoped histo
     expect(body).not.toContain('Manage hosts');
     expect(body).toContain('Updates every 30 seconds');
     expect(body).not.toContain('>Refresh<');
+    expect(body.indexOf('id="temperature-history-title"')).toBeGreaterThan(
+        body.indexOf('id="capacity-history-title"')
+    );
+    expect(body.match(/aria-label="History range"/g)).toHaveLength(2);
 });
 
 it('keeps fleet-wide queue scope explicit and preserves unavailable estimates', () => {