Expand test coverage across server, agent, and web; fix bugs found during audit.

Adds hundreds of unit/integration/e2e tests, fixes WS bcrypt auth, config merge, fleet analytics, agent schedule/log tail, and documents stale PROBLEMS items. Updates PROBLEMS.md, README, and test scripts; ignores local spread-kits and coverage dirs.

server/web/e2e/remote-actions.spec.ts

@@ -0,0 +1,72 @@
+import { expect, test } from '@playwright/test';
+import { loginToDashboard } from './fixtures';
+
+const OFFLINE_AGENT = {
+  id: 'e2e-offline-agent',
+  name: 'Offline Node',
+  wallet: '4' + 'A'.repeat(94),
+  ip: '192.168.1.99',
+  version: '1.0.0',
+  status: 'offline',
+  cpu_cores: 4,
+  memory_gb: 8,
+  last_seen: new Date(Date.now() - 3600_000).toISOString(),
+  created_at: new Date().toISOString(),
+  hashrate_15s: 0,
+  hashrate_1m: 0,
+  hashrate_15m: 0,
+  shares_total: 0,
+  shares_good: 0,
+  shares_bad: 0,
+  cpu_usage_pct: 0,
+  memory_usage_pct: 0,
+  uptime_seconds: 0,
+  platform: 'windows',
+  arch: 'amd64',
+};
+
+test.describe('Remote actions UI', () => {
+  test.beforeEach(async ({ page }) => {
+    await page.route('**/api/v1/agents', async (route) => {
+      if (route.request().method() === 'GET' && route.request().url().endsWith('/agents')) {
+        await route.fulfill({ json: [OFFLINE_AGENT] });
+        return;
+      }
+      await route.continue();
+    });
+    await page.route('**/api/v1/agents/*/stats*', async (route) => {
+      await route.fulfill({ json: [] });
+    });
+    await page.route('**/api/v1/builds', async (route) => {
+      await route.fulfill({ json: [] });
+    });
+    await page.route('**/api/v1/server/info', async (route) => {
+      await route.fulfill({
+        json: {
+          version: 'test',
+          suggested_url: 'http://127.0.0.1:8989',
+          agent_count: 1,
+          online_count: 0,
+        },
+      });
+    });
+    await loginToDashboard(page);
+    await page.getByRole('link', { name: /Fleet Roster/i }).click();
+    await expect(page.getByRole('heading', { name: 'Fleet Roster' })).toBeVisible({ timeout: 10_000 });
+    await expect(page.getByText('Offline Node')).toBeVisible({ timeout: 10_000 });
+  });
+
+  test('detail panel disables remote actions for offline agent', async ({ page }) => {
+    await page.getByText('Offline Node').click();
+    const detail = page.locator('.agent-detail');
+    await expect(detail.getByRole('heading', { name: 'Remote Control' })).toBeVisible({ timeout: 10_000 });
+    await expect(detail.getByRole('button', { name: 'Screenshot' })).toBeDisabled();
+    await expect(detail.getByRole('button', { name: 'Pause' })).toBeDisabled();
+  });
+
+  test('compact row remote actions disabled when offline', async ({ page }) => {
+    await page.getByText('Offline Node').click();
+    const compact = page.locator('.agent-list-item.expanded');
+    await expect(compact.getByRole('button', { name: 'Pause' })).toBeDisabled();
+  });
+});