fix: remove completion celebration animation

Remove the large "done" animation that appeared when Ralph loops completed.
The completion state is now simply reflected in the tracker panel without
the intrusive overlay.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/web/public/styles.css

@@ -820,79 +820,6 @@ body {
   text-decoration: line-through;
 }
 
-/* Completion Celebration */
-.ralph-celebration {
-  position: absolute;
-  top: 0;
-  left: 0;
-  right: 0;
-  bottom: 0;
-  display: none;
-  align-items: center;
-  justify-content: center;
-  background: rgba(10, 10, 10, 0.95);
-  z-index: 10;
-}
-
-.ralph-celebration.show {
-  display: flex;
-  animation: ralph-celebration-in 0.3s ease-out;
-}
-
-@keyframes ralph-celebration-in {
-  from { opacity: 0; }
-  to { opacity: 1; }
-}
-
-.ralph-celebration-content {
-  text-align: center;
-}
-
-.ralph-checkmark {
-  width: 60px;
-  height: 60px;
-  margin: 0 auto 0.75rem;
-}
-
-.ralph-checkmark svg {
-  width: 100%;
-  height: 100%;
-}
-
-.ralph-checkmark-circle {
-  fill: none;
-  stroke: var(--green);
-  stroke-width: 2;
-  stroke-dasharray: 166;
-  stroke-dashoffset: 166;
-  animation: ralph-circle 0.6s ease-out forwards;
-}
-
-.ralph-checkmark-check {
-  fill: none;
-  stroke: var(--green);
-  stroke-width: 3;
-  stroke-linecap: round;
-  stroke-linejoin: round;
-  stroke-dasharray: 48;
-  stroke-dashoffset: 48;
-  animation: ralph-check 0.3s ease-out 0.4s forwards;
-}
-
-@keyframes ralph-circle {
-  to { stroke-dashoffset: 0; }
-}
-
-@keyframes ralph-check {
-  to { stroke-dashoffset: 0; }
-}
-
-.ralph-celebration-text {
-  font-size: 1rem;
-  font-weight: 600;
-  color: var(--green);
-}
-
 /* Empty state (legacy support) */
 .inner-state-empty {
   color: var(--text-muted);