Add Prettier and ESLint tooling (Refs #77)

tests/unit/server-freshness.test.ts

@@ -9,13 +9,25 @@ it('keeps healthy reports online across polling and delivery delays, then expire
     vi.useFakeTimers();
     const reportAt = Date.parse('2026-09-18T12:00:00Z');
     const timestamp = new Date(reportAt).toISOString();
-    for (const elapsed of [-999, 0, STATUS_REFRESH_MS, STATUS_REFRESH_MS + 4000, 45_000, 60_000, 90_000, 90_001, 120_000]) {
+    for (const elapsed of [
+        -999,
+        0,
+        STATUS_REFRESH_MS,
+        STATUS_REFRESH_MS + 4000,
+        45_000,
+        60_000,
+        90_000,
+        90_001,
+        120_000
+    ]) {
         const now = reportAt + elapsed;
         vi.setSystemTime(now);
         const expected = elapsed <= 90_000;
         const health = classifyHealth(timestamp, null, 'running');
         expect(health).toBe(expected ? 'online' : 'stale');
-        expect(freshServer({ health, last_seen_at: timestamp, last_error: null } as FleetServer, now)).toBe(expected);
+        expect(
+            freshServer({ health, last_seen_at: timestamp, last_error: null } as FleetServer, now)
+        ).toBe(expected);
     }
     vi.setSystemTime(reportAt + 120_001);
     expect(classifyHealth(timestamp, null, 'running')).toBe('offline');
@@ -29,7 +41,12 @@ it('does not hide failures or accept missing, invalid, or far-future timestamps'
     expect(classifyHealth(timestamp, 'timeout', 'running')).toBe('stale');
     expect(classifyHealth(timestamp, null, 'stopped')).toBe('offline');
     expect(classifyHealth(timestamp, null, 'restarting')).toBe('starting');
-    expect(freshServer({ health: 'online', last_seen_at: timestamp, last_error: 'timeout' } as FleetServer, now)).toBe(false);
+    expect(
+        freshServer(
+            { health: 'online', last_seen_at: timestamp, last_error: 'timeout' } as FleetServer,
+            now
+        )
+    ).toBe(false);
     for (const invalid of [null, 'invalid', new Date(now + 1001).toISOString()]) {
         expect(freshStatusTimestamp(invalid, now)).toBe(false);
         expect(classifyHealth(invalid, null, 'running')).toBe('offline');