Polish light theme surfaces and add Jobs tray settings

Expand light-mode CSS for dashboard, details, terminals, job/pull progress, restoring boot card, and settings chrome. Add a Jobs tray settings tab for dismiss timing and reconnect feedback volume; auto terminal themes follow UI color mode when saved.

ui/ops.css

@@ -963,6 +963,7 @@
   padding-bottom: 0.5rem;
 }
 
+/* Save control only — no full-width bar / gradient strip */
 #settings-view .settings-footer {
   flex: 0 0 auto;
   display: flex;
@@ -970,14 +971,10 @@
   align-items: center;
   gap: 0.75rem;
   margin-top: 0;
-  padding: 0.85rem 0 0.15rem;
-  border-top: 1px solid rgba(255, 255, 255, 0.1);
-  background: linear-gradient(
-    180deg,
-    rgba(12, 16, 22, 0.55) 0%,
-    rgba(12, 16, 22, 0.96) 40%,
-    rgba(12, 16, 22, 1) 100%
-  );
+  padding: 0.65rem 0 0.25rem;
+  border: none;
+  background: transparent;
+  box-shadow: none;
 }
 
 #settings-view .settings-footer .settings-save-btn {