Improve operational UX, recovery flows, and action safety

Implement the approved UX review across Fleet, Betas, Library, deployments, and Settings. Add reviewed promotion and reconciliation plans, atomic queued-removal cancellation, recoverable beta drafts and launch inputs, accessible controls, and mobile improvements.

Validated with 473 tests, a clean typecheck, production build, and isolated desktop/mobile browser walkthroughs. Include the review and implementation coverage notes.

src/lib/ui/components/primitives/Input.svelte

@@ -63,7 +63,7 @@
         width: 100%;
         padding: 9px 12px;
         background: var(--surface-sunken);
-        border: 1px solid var(--border-subtle);
+        border: 1px solid var(--border-control);
         border-radius: var(--radius-md);
         color: var(--text-primary);
         font-family: var(--font-body);
@@ -77,7 +77,7 @@
     .input.mono { font-family: var(--font-mono); }
     .input::placeholder { color: var(--text-quaternary); }
 
-    .input:hover { border-color: var(--border-strong); }
+    .input:hover { border-color: var(--border-control-hover); }
     .input:focus {
         outline: none;
         border-color: var(--accent-primary);