fix: improve deployment progress UI and prevent duplicate deployment rows

- Redesign DeploymentProgress component: track-based layout with amber
  brand color, checkmarks for completed steps, user-friendly labels
  (Prepare, Image, Network, Launch, Verify, Activate, Live)
- Delete terminal (STOPPED/FAILED) deployments before creating new ones
  for the same app+environment, preventing duplicate rows in the UI
- Update CLAUDE.md with comprehensive key class locations, correct deploy
  stages, database migration reference, and REST endpoint summary

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/components/DeploymentProgress.module.css

@@ -1,74 +1,104 @@
 .container {
+  position: relative;
+  padding: 12px 0 4px;
+}
+
+/* Background track line spanning full width between first and last dot */
+.track {
+  position: absolute;
+  top: 16px;
+  left: calc(100% / 14);
+  right: calc(100% / 14);
+  height: 2px;
+  background: var(--border-subtle);
+  border-radius: 1px;
+}
+
+.trackFill {
+  height: 100%;
+  background: var(--amber);
+  border-radius: 1px;
+  transition: width 0.4s ease;
+}
+
+.trackFailed {
+  background: var(--error);
+}
+
+/* Steps row — dots + labels positioned over the track */
+.steps {
+  position: relative;
   display: flex;
-  align-items: center;
-  gap: 0;
-  padding: 8px 0;
+  justify-content: space-between;
 }
 
 .step {
   display: flex;
+  flex-direction: column;
   align-items: center;
-  gap: 0;
+  width: calc(100% / 7);
 }
 
+/* Dots */
 .dot {
-  width: 12px;
-  height: 12px;
+  width: 10px;
+  height: 10px;
   border-radius: 50%;
   border: 2px solid var(--border-subtle);
-  background: transparent;
+  background: var(--surface, #1a1a1a);
+  display: flex;
+  align-items: center;
+  justify-content: center;
   flex-shrink: 0;
+  transition: all 0.2s ease;
 }
 
-.dotCompleted {
-  background: var(--success);
-  border-color: var(--success);
+.dot.completed {
+  background: var(--amber);
+  border-color: var(--amber);
+  color: var(--surface, #1a1a1a);
 }
 
-.dotActive {
-  background: var(--accent, #6c7aff);
-  border-color: var(--accent, #6c7aff);
-  animation: pulse 1.5s ease-in-out infinite;
+.dot.active {
+  border-color: var(--amber);
+  background: var(--amber);
+  box-shadow: 0 0 0 3px color-mix(in srgb, var(--amber) 25%, transparent);
+  animation: pulse 2s ease-in-out infinite;
 }
 
-.dotFailed {
+.dot.failed {
   background: var(--error);
   border-color: var(--error);
+  box-shadow: 0 0 0 3px color-mix(in srgb, var(--error) 25%, transparent);
 }
 
-.line {
-  width: 32px;
-  height: 2px;
-  background: var(--border-subtle);
-}
-
-.lineCompleted {
-  background: var(--success);
-}
-
+/* Labels */
 .label {
   font-size: 10px;
   color: var(--text-muted);
   text-align: center;
-  margin-top: 4px;
+  margin-top: 6px;
+  line-height: 1;
+  opacity: 0.6;
+}
+
+.labelDone {
+  opacity: 0.8;
 }
 
 .labelActive {
-  color: var(--accent, #6c7aff);
+  color: var(--amber);
   font-weight: 600;
+  opacity: 1;
 }
 
 .labelFailed {
   color: var(--error);
-}
-
-.stepColumn {
-  display: flex;
-  flex-direction: column;
-  align-items: center;
+  font-weight: 600;
+  opacity: 1;
 }
 
 @keyframes pulse {
-  0%, 100% { opacity: 1; }
-  50% { opacity: 0.5; }
+  0%, 100% { box-shadow: 0 0 0 3px color-mix(in srgb, var(--amber) 25%, transparent); }
+  50% { box-shadow: 0 0 0 5px color-mix(in srgb, var(--amber) 10%, transparent); }
 }