refactor(frontend): delete the dead CSS the consumer map surfaced — 102 classes, 588 lines (#2962)

Milestone 302's map flagged 195 css rows no template names. Re-derived the
list locally with a stricter test than the map's — a class is dead only if
its token appears NOWHERE outside a <style> block, in markup or script, and
is not the static half of a concatenated name (`priority-${p}`) — which
takes the map's known blind spot off the table. 123 survived that; 21 of
those are Vue <Transition>/<transition-group> classes generated at runtime
from a name= attribute (detail-fade, peek-slide, shortcuts-fade, tab-fade,
toast) and one is ProseMirror's vendor class. Those stay. The other 102 go.

- SettingsView.vue (80, -417 lines): whole features whose UI was removed —
  Ollama model management (model-*, pull-bar-*, suggestion-chip), push
  notifications (push-*), the voice library and voice blending (voice-*,
  blend-*), geo status (geo-*), MCP package rows, retention, the learned
  summary, and the form furniture that served them.
- editor-shared.css (16, -151): the standalone assist panel, superseded by
  the sidebar assist section — streaming now renders as .stream-preview in
  the main area, so .assist-panel*, .assist-sections*, .assist-preview-box
  and .typing-indicator have no markup left. @keyframes blink went with the
  last rule that animated it. .editor-body/.editor-main are dead too:
  TaskEditorView replaced them with .task-body/.task-main.
- theme.css: .btn-new-conv/.btn-send dropped from the touch-target list
  (names from another app), and the .hide-desktop utility no one used. The
  generated --fs-* token block is untouched.
- ShareDialog .user-result-email, KnowledgeView .today-link,
  ProjectView .edit-input (the remainder rule keeps its rationale comment
  and its two live selectors).

A selector dies only when every class in its descendant chain is checked —
`.live .dead` matches nothing either — and a rule only when its whole comma
list is dead, so mixed lists keep their live half. Template and script
regions are byte-identical; check_dangling_styles.py and
check_design_tokens.py both pass, with only the six pre-existing reports.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

frontend/src/assets/editor-shared.css

@@ -15,18 +15,6 @@
   padding: 1rem 1.5rem 0.5rem;
   border-bottom: 1px solid var(--fs-border-color);
 }
-.editor-body {
-  flex: 1;
-  min-height: 0;
-  display: flex;
-  overflow: hidden;
-}
-.editor-main {
-  flex: 1;
-  min-width: 0;
-  overflow-y: auto;
-  padding: 0.75rem 1.5rem 1.5rem;
-}
 
 /* ── Toolbar & inputs ── */
 .toolbar {
@@ -106,95 +94,6 @@
 .tag-check {
   font-size: 0.7rem;
 }
-
-/* ── Assist panel ── */
-.assist-panel {
-  width: 320px;
-  flex-shrink: 0;
-  border-left: 1px solid var(--fs-border-color);
-  background: var(--fs-surface-raised);
-  display: flex;
-  flex-direction: column;
-  overflow: hidden;
-}
-.assist-panel-header {
-  flex-shrink: 0;
-  display: flex;
-  align-items: center;
-  gap: 0.5rem;
-  padding: 0.65rem 0.9rem;
-  border-bottom: 1px solid var(--fs-border-color);
-}
-.assist-panel-title {
-  flex: 1;
-  font-size: 0.8rem;
-  font-weight: 500;
-  color: var(--fs-text-secondary);
-  text-transform: uppercase;
-  letter-spacing: 0.05em;
-}
-.assist-panel-body {
-  flex: 1;
-  min-height: 0;
-  overflow-y: auto;
-  padding: 0.75rem 0.9rem 1rem;
-  display: flex;
-  flex-direction: column;
-  gap: 0.6rem;
-}
-
-/* Section list */
-.assist-sections-label {
-  font-size: 0.72rem;
-  font-weight: 500;
-  text-transform: uppercase;
-  letter-spacing: 0.04em;
-  color: var(--fs-text-tertiary);
-  margin-bottom: 0.2rem;
-}
-.assist-sections {
-  border: 1px solid var(--fs-border-color);
-  border-radius: var(--fs-radius-sm);
-  background: var(--fs-surface-page);
-  max-height: 200px;
-  overflow-y: auto;
-  flex-shrink: 0;
-}
-.assist-section-item {
-  padding: 0.35rem 0.7rem;
-  cursor: pointer;
-  font-size: 0.82rem;
-  border-left: 3px solid transparent;
-  color: var(--fs-text-primary);
-  white-space: nowrap;
-  overflow: hidden;
-  text-overflow: ellipsis;
-}
-.assist-section-item:hover {
-  background: var(--fs-surface-raised);
-}
-.assist-section-item.selected {
-  border-left-color: var(--fs-accent);
-  background: var(--fs-surface-raised);
-  font-weight: 500;
-}
-.assist-empty,
-.assist-hint {
-  padding: 0.6rem 0.7rem;
-  font-size: 0.82rem;
-  color: var(--fs-text-tertiary);
-}
-.assist-target-preview {
-  font-size: 0.8rem;
-  color: var(--fs-text-secondary);
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
-.assist-target-preview em {
-  font-style: normal;
-  color: var(--fs-text-primary);
-}
 .assist-instruction {
   width: 100%;
   padding: 0.5rem 0.65rem;
@@ -213,33 +112,6 @@
   gap: 0.5rem;
 }
 
-/* Streaming */
-.assist-streaming-label {
-  font-size: 0.8rem;
-  color: var(--fs-text-secondary);
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
-.assist-preview-box {
-  padding: 0.65rem;
-  border: 1px solid var(--fs-border-color);
-  border-radius: var(--fs-radius-sm);
-  background: var(--fs-surface-page);
-  font-size: 0.9rem;
-  max-height: 300px;
-  overflow-y: auto;
-}
-.typing-indicator {
-  color: var(--fs-text-tertiary);
-  font-size: 0.75rem;
-  letter-spacing: 0.15em;
-  animation: blink 1s step-end infinite;
-}
-@keyframes blink {
-  50% { opacity: 0; }
-}
-
 /* Active hint shown in the panel while output is inline */
 .assist-active-hint {
   padding: 0.5rem 0.75rem;
@@ -257,16 +129,6 @@
   font-size: 0.85rem;
   color: var(--fs-error);
 }
-
-/* Review / diff */
-.assist-review-header {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  font-size: 0.8rem;
-  font-weight: 500;
-  color: var(--fs-text-secondary);
-}
 .diff-view {
   border: 1px solid var(--fs-border-color);
   border-radius: var(--fs-radius-sm);
@@ -398,22 +260,9 @@
 
 /* ── Mobile ── */
 @media (max-width: 768px) {
-  .editor-body {
-    flex-direction: column;
-  }
-  .assist-panel {
-    width: auto;
-    flex: 0 0 45%;
-    border-left: none;
-    border-top: 1px solid var(--fs-border-color);
-    border-radius: var(--fs-radius-lg) var(--fs-radius-lg) 0 0;
-  }
   .editor-header {
     padding: 0.75rem 1rem 0.5rem;
   }
-  .editor-main {
-    padding: 0.5rem 1rem 1rem;
-  }
 }
 
 /* ---------------------------------------------------------------------------