feat(maestro): render queued messages as blurred chat bubbles

Queued prompts now appear inline in the transcript as faded user bubbles
instead of a pill badge above the composer.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

web/src/styles.css

@@ -2375,6 +2375,22 @@ input.leaf-rename:focus {
   background: var(--surface-2);
 }
 
+/* Queued messages: optimistic user bubbles, not yet sent. */
+.st-row-queued {
+  justify-content: flex-end;
+  pointer-events: none;
+}
+
+.st-row-queued .st-body {
+  flex: 0 1 auto;
+  max-width: min(86%, 72ch);
+  padding: var(--sp-2) var(--sp-3);
+  border-radius: var(--r-2);
+  background: var(--surface-3);
+  opacity: 0.45;
+  filter: blur(0.5px);
+}
+
 .st-user-text {
   white-space: pre-wrap;
   overflow-wrap: anywhere;
@@ -3112,18 +3128,6 @@ input.leaf-rename:focus {
   transition: border-color var(--dur-fast) var(--ease-out);
 }
 
-.structured-queue {
-  position: absolute;
-  right: var(--sp-2);
-  bottom: calc(100% + var(--sp-1));
-  padding: 3px var(--sp-2);
-  border: 1px solid var(--border);
-  border-radius: var(--r-pill);
-  background: var(--surface);
-  color: var(--muted);
-  font-size: var(--fs-11);
-  box-shadow: var(--shadow-1);
-}
 
 .structured-composer:focus-within {
   border-top-color: var(--border);