Adicionar timer e melhorar espaçamento da toolbar do terminal

- Contador de tempo (mm:ss ou hh:mm:ss) que inicia ao processar e
  persiste entre reloads via sessionStorage
- Espaçamento maior entre elementos da toolbar principal e action bar
- Timer para ao completar execução/pipeline ou ao limpar terminal

public/css/styles.css

@@ -2681,25 +2681,39 @@ tbody tr:hover td {
 
 .terminal-toolbar {
   background-color: var(--bg-secondary);
-  padding: 10px 16px;
+  padding: 12px 16px;
   display: flex;
   align-items: center;
   justify-content: space-between;
   border-bottom: 1px solid var(--border-primary);
   flex-shrink: 0;
-  gap: 12px;
+  gap: 16px;
 }
 
 .terminal-toolbar-left {
   display: flex;
   align-items: center;
-  gap: 8px;
+  gap: 10px;
 }
 
 .terminal-toolbar-right {
   display: flex;
   align-items: center;
-  gap: 8px;
+  gap: 12px;
+}
+
+.terminal-timer {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  font-family: 'JetBrains Mono', monospace;
+  font-size: 13px;
+  font-weight: 500;
+  color: var(--success);
+  background: rgba(34, 197, 94, 0.1);
+  padding: 4px 10px;
+  border-radius: 6px;
+  border: 1px solid rgba(34, 197, 94, 0.2);
 }
 
 .terminal-dot--red {
@@ -4489,13 +4503,15 @@ body, .sidebar, .header, .card, .modal-content, .input, .select, textarea, .metr
 
 .terminal-action-toolbar {
   display: flex; align-items: center; justify-content: space-between;
-  padding: 0.5rem 0.75rem;
+  padding: 0.5rem 1rem;
   background: var(--bg-tertiary);
   border: 1px solid var(--border-color);
   border-bottom: none;
   border-radius: 8px 8px 0 0;
+  gap: 12px;
 }
-.terminal-toolbar-left, .terminal-toolbar-right { display: flex; align-items: center; gap: 0.25rem; }
+.terminal-action-toolbar .terminal-toolbar-left,
+.terminal-action-toolbar .terminal-toolbar-right { display: flex; align-items: center; gap: 0.5rem; }
 .terminal-toggle-label {
   display: flex; align-items: center; gap: 0.375rem;
   font-size: 0.75rem; color: var(--text-secondary); cursor: pointer; user-select: none;