feat(FN-2488): add terminal refresh fallbacks for terminal startup failures

- Add refresh-page actions alongside retry/reinitialize in TerminalModal bootstrap and xterm init error states
- Add terminal error action-group styling so multiple recovery buttons render cleanly
- Extend TerminalModal tests to cover new refresh controls and verify window reload behavior
- Remove unused TaskLogEntry import and drop the stale hooks eslint suppression in dashboard-tui app

packages/dashboard/app/components/TerminalModal.css

@@ -696,6 +696,14 @@
   text-align: center;
 }
 
+.terminal-error-actions {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  flex-wrap: wrap;
+  gap: var(--space-sm, 8px);
+}
+
 .terminal-retry-btn {
   display: flex;
   align-items: center;