Merge remote-tracking branch 'origin/master' into pr/cod-455-xlsx-preview

# Conflicts:
#	CLAUDE.md
#	config/test-suites.ts

src/web/public/styles.css

@@ -460,6 +460,31 @@ textarea:focus-visible {
   font-size: 16px !important; /* prevent iOS auto-zoom on focus */
 }
 
+.xterm-helpers .codeman-ime-preview {
+  position: absolute;
+  left: var(--xterm-helper-left, 0px);
+  top: var(--xterm-helper-top, 0px);
+  z-index: 6;
+  pointer-events: none;
+  white-space: pre;
+  color: var(--terminal-foreground, var(--text, #fff));
+  font-family: var(--font-mono, monospace);
+  font-size: 14px;
+  font-weight: 400;
+  font-style: normal;
+  line-height: 1.2;
+  height: 1.2em;
+}
+
+.xterm-helpers .codeman-ime-preview[data-phase='provisional'] {
+  text-decoration: underline;
+  text-decoration-style: dotted;
+}
+
+.touch-device .xterm-helpers.codeman-ime-preview-owned .composition-view.active {
+  display: none;
+}
+
 /* Session tab focus */
 .session-tab:focus-visible {
   outline: 2px solid var(--accent);
@@ -634,6 +659,83 @@ html[data-tab-orientation='vertical'] .tab-rail .session-tab .tab-info {
   min-width: 0;
 }
 
+/* --- Grouped rail (owner tab layout) ---------------------------------- */
+/* Only rendered when the owner has at least one group (tab-layout-browser.js).
+   Each group's rows sit in their OWN flex column, so the activity sort's inline
+   `order` (and web tabs' `order: 9999`) rank rows within a group, never across. */
+html[data-tab-orientation='vertical'] .tab-rail .tab-layout-group,
+html[data-tab-orientation='vertical'] .tab-rail .tab-layout-group-refs {
+  display: flex;
+  flex: 0 0 auto;
+  flex-direction: column;
+  gap: 2px;
+  min-width: 0;
+}
+
+html[data-tab-orientation='vertical'] .tab-rail .tab-layout-group + .tab-layout-group {
+  margin-top: 4px;
+}
+
+html[data-tab-orientation='vertical'] .tab-rail .tab-layout-group-header {
+  /* Positioned so a collapsed header can carry the tab alert ring (::before). */
+  position: relative;
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  width: 100%;
+  min-width: 0;
+  padding: 4px 6px 2px;
+  border: 0;
+  border-radius: 4px;
+  color: var(--text-muted);
+  background: transparent;
+  font: inherit;
+  font-size: 10px;
+  font-weight: 700;
+  letter-spacing: 0.08em;
+  text-align: left;
+}
+
+html[data-tab-orientation='vertical'] .tab-rail .tab-layout-group-toggle {
+  cursor: pointer;
+  user-select: none;
+}
+
+html[data-tab-orientation='vertical'] .tab-rail .tab-layout-group-toggle:hover {
+  color: var(--text);
+  background: var(--bg-hover);
+}
+
+html[data-tab-orientation='vertical'] .tab-rail .tab-layout-group-toggle:focus-visible {
+  outline: 2px solid var(--accent);
+  outline-offset: -2px;
+}
+
+.tab-layout-group-name {
+  flex: 1 1 auto;
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.tab-layout-group-count {
+  flex: 0 0 auto;
+  font-variant-numeric: tabular-nums;
+  opacity: 0.75;
+}
+
+.tab-layout-group-chevron::before {
+  content: '\25BE';
+  display: inline-block;
+}
+
+/* Keyed on the section, not aria-expanded: a group with no open rows is a tree
+   leaf with no aria-expanded at all, and its chevron must still show its state. */
+.tab-layout-group--collapsed > .tab-layout-group-toggle .tab-layout-group-chevron::before {
+  content: '\25B8';
+}
+
 html[data-tab-orientation='vertical'] .header-right {
   margin-left: auto;
 }
@@ -1707,7 +1809,9 @@ html[data-tab-orientation='vertical'] .tab-rail .session-tab .tab-name-prefix {
   line-height: 1;
   color: var(--text-muted);
   overflow: hidden;
-  cursor: default;
+  /* A control, like its gear/detach siblings: the pointer must not read as
+     "nothing here" over the one button that closes the session. */
+  cursor: pointer;
   border-radius: 3px;
   /* Performance: use transform for GPU acceleration */
   transition: opacity 0.05s ease-out, width 0.05s ease-out, padding 0.05s ease-out;
@@ -1760,7 +1864,8 @@ html[data-tab-orientation='vertical'] .tab-rail .session-tab .tab-name-prefix {
    The overlay paints above the tab's inline content (positioned vs flow), which
    is fine at these alphas and is exactly what keeps it visible over the active
    tab's opaque-ish background. */
-.session-tabs .session-tab.tab-alert-action::before {
+.session-tabs .session-tab.tab-alert-action::before,
+.session-tabs .tab-layout-group-header.tab-alert-action::before {
   content: '';
   position: absolute;
   inset: -2px;
@@ -1785,7 +1890,8 @@ html[data-tab-orientation='vertical'] .tab-rail .session-tab .tab-name-prefix {
   box-shadow: 0 0 6px rgba(239, 68, 68, 0.7);
 }
 
-.session-tabs .session-tab.tab-alert-idle::before {
+.session-tabs .session-tab.tab-alert-idle::before,
+.session-tabs .tab-layout-group-header.tab-alert-idle::before {
   content: '';
   position: absolute;
   inset: -2px;
@@ -10510,6 +10616,21 @@ kbd {
     drop-shadow(0 0 9px var(--lineage-color, var(--session-blue, #2b8fd9)));
 }
 
+/* An arc re-anchored to a collapsed group's header (its row is hidden): quieter
+   and dotted, so it reads as "somewhere in there" rather than a real row. */
+.connection-line.lineage-line--proxied {
+  stroke-dasharray: 2 7;
+  opacity: 0.46;
+}
+
+.connection-line.lineage-line--proxied.lineage-line--working {
+  opacity: 0.62;
+}
+
+.lineage-line-dot.lineage-line-dot--proxied {
+  opacity: 0.46;
+}
+
 /* The child end marches while that worker is actually working, so the line
    itself carries the signal. Motion is opt-out-able at the OS level. */
 @media (prefers-reduced-motion: no-preference) {