feat(FN-3842): finalize dashboard chat reattach and cleanup merge

- Isolate DocumentsView mobile styling while preserving dashboard UI behavior
- Add legacy chat stream reattach support across API routes and chat hooks with updated tests
- Remove tracked hermes runtime dist artifacts to prevent plugin autostash conflicts
- Rename the FN-3842 merge finalize changeset file and keep related changeset updates

Fusion-Task-Id: FN-3842

packages/dashboard/app/components/DocumentsView.css

@@ -618,232 +618,6 @@
 
 
 @media (max-width: 768px) {
-  .agent-board {
-    grid-template-columns: 1fr;
-  }
-
-  .agent-board-actions .btn,
-  .agent-card-actions .btn {
-    min-height: calc(var(--space-2xl) + var(--space-xs));
-  }
-
-  .agent-card-details-btn {
-    margin-left: auto;
-  }
-
-  .agent-controls-panel {
-    left: var(--space-md);
-    right: var(--space-md);
-    top: calc(var(--header-height) + var(--space-sm));
-    width: auto;
-    max-height: calc(100dvh - var(--header-height) - var(--space-2xl));
-    overflow-y: auto;
-  }
-
-  .agent-controls {
-    flex-direction: column;
-    align-items: stretch;
-    gap: var(--space-sm);
-  }
-
-  .agent-controls-filters {
-    flex-direction: column;
-    align-items: stretch;
-    width: 100%;
-    padding: var(--space-sm);
-  }
-
-  .agent-controls-actions {
-    display: flex;
-    flex-direction: column;
-    gap: var(--space-sm);
-  }
-
-  .agent-controls-actions .btn {
-    width: 100%;
-    min-height: calc(var(--space-2xl) + var(--space-xs));
-  }
-
-  .agent-controls-panel .agent-controls-actions {
-    justify-content: flex-start;
-  }
-
-  .agent-state-filter,
-  .agent-system-filter {
-    width: 100%;
-    min-height: calc(var(--space-2xl) + var(--space-xs));
-  }
-
-  .agent-state-filter-select {
-    width: 100%;
-  }
-
-  .agent-heartbeat-control {
-    align-items: flex-start;
-  }
-
-  .agent-heartbeat-select {
-    min-height: calc(var(--space-2xl) + var(--space-xs));
-  }
-
-  .heartbeat-multiplier-controls {
-    flex-direction: column;
-    align-items: stretch;
-  }
-
-  .heartbeat-multiplier-value {
-    text-align: left;
-  }
-
-  .agent-global-controls {
-    padding: var(--space-sm);
-  }
-
-  .heartbeat-multiplier-label {
-    margin-bottom: var(--space-sm);
-  }
-
-  .agents-view-content {
-    padding: var(--space-md);
-  }
-
-
-  /* Skills View mobile */
-  .skills-view-header {
-    padding: var(--space-sm) var(--space-md);
-    flex-wrap: wrap;
-  }
-
-  .skills-view-title h2 {
-    font-size: 16px;
-  }
-
-  .skills-view-count {
-    font-size: 12px;
-  }
-
-  .skills-view-actions {
-    min-height: 36px;
-    display: flex;
-    align-items: center;
-  }
-
-  .skills-view-actions .btn {
-    min-height: 36px;
-  }
-
-  .skills-view-content {
-    padding: var(--space-md);
-  }
-
-  .skills-view-section {
-    margin-bottom: var(--space-md);
-  }
-
-  .skills-view-section-title {
-    font-size: 13px;
-  }
-
-  .skills-view-search .form-input {
-    max-width: none;
-    width: 100%;
-  }
-
-  .skills-view-grid {
-    grid-template-columns: 1fr;
-  }
-
-  .skills-view-item {
-    flex-wrap: wrap;
-    gap: var(--space-sm);
-    padding: var(--space-md);
-    min-height: 36px;
-  }
-
-  .skills-view-item-info {
-    width: 100%;
-  }
-
-  .skills-view-item-toggle {
-    padding: var(--space-sm);
-  }
-
-  .skills-view-toggle-slider {
-    min-width: 40px;
-    min-height: 22px;
-  }
-
-  .skills-view-card {
-    padding: var(--space-sm);
-  }
-
-  .skills-view-card-title {
-    font-size: 13px;
-  }
-
-  .skills-view-card-description {
-    font-size: 12px;
-  }
-
-  .skills-view-empty {
-    padding: var(--space-lg);
-  }
-
-  .skills-view-error {
-    padding: var(--space-lg);
-  }
-
-  .skills-view-loading {
-    padding: var(--space-md);
-  }
-
-  .skills-view-item--selected {
-    border-color: var(--todo);
-  }
-
-  .skills-view-detail {
-    padding: var(--space-md);
-    border-left-width: 2px;
-  }
-
-  .skills-view-detail-content {
-    font-size: 11px;
-    max-height: calc(60dvh - 200px);
-    -webkit-overflow-scrolling: touch;
-  }
-
-  .skills-view-detail-close {
-    min-height: 36px;
-    min-width: 36px;
-  }
-
-  .agent-tree__indent--1 { padding-left: var(--space-lg); }
-  .agent-tree__indent--2 { padding-left: calc(var(--space-lg) * 2); }
-  .agent-tree__indent--3 { padding-left: calc(var(--space-lg) * 3); }
-  .agent-tree__indent--4 { padding-left: calc(var(--space-lg) * 4); }
-
-  .agent-tree__toggle {
-    min-width: calc(var(--space-lg) * 2 + var(--space-xs));
-    min-height: calc(var(--space-lg) * 2 + var(--space-xs));
-  }
-
-  /* Agent evaluation ratings mobile */
-  .rating-summary-card {
-    padding: 16px;
-  }
-
-  .rating-average {
-    font-size: 28px;
-  }
-
-  .category-breakdown {
-    grid-template-columns: 1fr;
-  }
-
-  .rating-history {
-    max-height: 250px;
-  }
-
   /* Documents View mobile */
   .documents-view-header {
     padding: var(--space-md);