Keep panel titles inside their cards and scope the hover

Collapsed Recent Imagery (English) and Data Layers (Portuguese) pushed
their toggles out of the card. Collapsed rail launchers now drop the
divider and pack closer, translated collapsed titles use compact type,
and any title that still does not fit ends in an ellipsis.

The hover now matches the dock trays' hover rather than their pinned
look, only on pointers that can hover, and recolours only the hovered
panel's own header, so Radio and body labels keep their colours.

The cyber theme keeps main's gutters and Display toggle size, the dock
and rails share --dock-label-* tokens, and the dimmed open Context title
rule is gone.

src/ui/styles/controls.css

@@ -86,28 +86,92 @@
 :is(#left-panel-stack, #right-context-rail)
   :is(.panel-header > .panel-title, .pp-header-label) {
   font-family: var(--font-mono);
-  font-size: 0.58rem;
-  font-weight: 500;
-  letter-spacing: 0.13rem;
+  font-size: var(--dock-label-font-size);
+  font-weight: var(--dock-label-font-weight);
+  letter-spacing: var(--dock-label-letter-spacing);
   text-transform: uppercase;
 }
 
+/* A hovered panel sets --rail-label-hover on itself (see below); its own
+   header picks it up. Radio sits inside Context and keeps its own colour. */
+:root:not([data-ui-theme='cyber'])
+  :is(#left-panel-stack, #right-context-rail)
+  :is(
+    .panel-header > .panel-title,
+    .pp-header-label,
+    :is(.panel-header, .pp-header-row) > .panel-collapse-btn
+  ) {
+  color: var(--rail-label-hover, var(--dock-label-color));
+}
+
+#radio-panel {
+  --rail-label-hover: initial;
+}
+
+/* A title never pushes its toggle out of the card: one that does not fit
+   ends in an ellipsis. Cyber draws a marker left of the title, which a clip
+   would cut, and keeps its own header layout. */
+:root:not([data-ui-theme='cyber'])
+  :is(#left-panel-stack, #right-context-rail)
+  :is(.panel-header > .panel-title, .pp-header-label) {
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+/* A collapsed launcher is 176px wide and its divider has no room to draw,
+   so the header drops it and packs closer. English titles such as Recent
+   Imagery then fit whole. Only the rail's own launchers: Radio, nested in
+   Context, keeps its divider. */
+:root:not([data-ui-theme='cyber'])
+  :is(#left-panel-stack, #right-context-rail)
+  > .panel-collapsible.collapsed
+  > [class$='-panel-inner']
+  > .panel-header,
+:root:not([data-ui-theme='cyber'])
+  :is(#left-panel-stack, #right-context-rail)
+  > #pp-toggles.collapsed
+  > .pp-header-row {
+  gap: 8px;
+}
+
 :root:not([data-ui-theme='cyber'])
   :is(#left-panel-stack, #right-context-rail)
-  :is(.panel-header > .panel-title, .pp-header-label, .panel-collapse-btn) {
-  color: rgba(206, 232, 239, 0.72);
+  > .panel-collapsible.collapsed
+  > [class$='-panel-inner']
+  > .panel-header
+  > .panel-divider,
+:root:not([data-ui-theme='cyber'])
+  :is(#left-panel-stack, #right-context-rail)
+  > #pp-toggles.collapsed
+  > .pp-header-row
+  > .panel-divider {
+  display: none;
 }
 
-/* A longer translated title in a collapsed rail launcher tightens its
-   tracking rather than pushing the disclosure button out of the card. */
+:root:not([data-ui-theme='cyber'])
+  :is(#left-panel-stack, #right-context-rail)
+  > .panel-collapsible.collapsed
+  > [class$='-panel-inner']
+  > .panel-header
+  > .panel-collapse-btn,
+:root:not([data-ui-theme='cyber'])
+  :is(#left-panel-stack, #right-context-rail)
+  > #pp-toggles.collapsed
+  > .pp-header-row
+  > .panel-collapse-btn {
+  margin-left: auto;
+}
+
+/* Translated titles run longer (Aktuelle Bilddaten), so a collapsed rail
+   launcher sets them in compact type rather than pushing the disclosure
+   button out of the card or cutting the word short. */
 html:not([lang='en'])
-  #right-context-rail
+  :is(#left-panel-stack, #right-context-rail)
   .panel-collapsible.collapsed
   .panel-title {
-  min-width: 0;
-  overflow: hidden;
-  text-overflow: ellipsis;
-  letter-spacing: 1.5px;
+  font-size: 8px;
+  letter-spacing: 1px;
 }
 
 .panel-divider {
@@ -141,64 +205,42 @@ html:not([lang='en'])
   background: rgba(255, 255, 255, 0.07);
 }
 
-/* A side panel answers the pointer as the command dock does: a blue edge,
-   a soft glow and an accent title. */
-:root:not([data-ui-theme='cyber'])
-  :is(#left-panel-stack, #right-context-rail)
-  :is(
-    .data-panel-inner,
-    .scene-panel-inner,
-    .cctv-panel-inner,
-    .radio-panel-inner,
-    .weather-panel-inner,
-    .recent-imagery-panel-inner,
-    .street-level-panel-inner,
-    .global-context-panel-inner,
-    #pp-toggles:not(.collapsed),
-    #pp-toggles.collapsed > .pp-header-row
-  ) {
-  transition:
-    border-color 160ms ease,
-    box-shadow 160ms ease;
-}
+/* A side panel answers the pointer as the command dock's trays do: a
+   brighter edge and an accent title and toggle. Touch screens have no hover,
+   so a tap must not leave a panel lit. */
+@media (hover: hover) and (pointer: fine) {
+  :root:not([data-ui-theme='cyber'])
+    :is(#left-panel-stack, #right-context-rail)
+    :where(
+      .data-panel-inner,
+      .scene-panel-inner,
+      .cctv-panel-inner,
+      .weather-panel-inner,
+      .recent-imagery-panel-inner,
+      .street-level-panel-inner,
+      .global-context-panel-inner,
+      #pp-toggles:not(.collapsed),
+      #pp-toggles.collapsed > .pp-header-row
+    ) {
+    transition: border-color var(--transition-fast);
+  }
 
-:root:not([data-ui-theme='cyber'])
-  :is(#left-panel-stack, #right-context-rail)
-  :is(
-    .data-panel-inner,
-    .scene-panel-inner,
-    .cctv-panel-inner,
-    .radio-panel-inner,
-    .weather-panel-inner,
-    .recent-imagery-panel-inner,
-    .street-level-panel-inner,
-    .global-context-panel-inner,
-    #pp-toggles:not(.collapsed),
-    #pp-toggles.collapsed > .pp-header-row
-  ):hover {
-  border-color: rgba(0, 212, 255, 0.55);
-  box-shadow:
-    0 8px 32px rgba(0, 0, 0, 0.5),
-    0 0 0 1px rgba(0, 212, 255, 0.08) inset,
-    0 0 1rem rgba(0, 212, 255, 0.12);
-}
-
-:root:not([data-ui-theme='cyber'])
-  :is(#left-panel-stack, #right-context-rail)
-  :is(
-    .data-panel-inner,
-    .scene-panel-inner,
-    .cctv-panel-inner,
-    .radio-panel-inner,
-    .weather-panel-inner,
-    .recent-imagery-panel-inner,
-    .street-level-panel-inner,
-    .global-context-panel-inner,
-    #pp-toggles:not(.collapsed),
-    #pp-toggles.collapsed > .pp-header-row
-  ):hover
-  :is(.panel-title, .pp-header-label, .panel-collapse-btn) {
-  color: var(--accent);
+  :root:not([data-ui-theme='cyber'])
+    :is(#left-panel-stack, #right-context-rail)
+    :where(
+      .data-panel-inner,
+      .scene-panel-inner,
+      .cctv-panel-inner,
+      .weather-panel-inner,
+      .recent-imagery-panel-inner,
+      .street-level-panel-inner,
+      .global-context-panel-inner,
+      #pp-toggles:not(.collapsed),
+      #pp-toggles.collapsed > .pp-header-row
+    ):hover {
+    --rail-label-hover: var(--accent);
+    border-color: var(--glass-border-hover);
+  }
 }
 
 /* ── Button Grid ──────────────────────────────── */
@@ -521,11 +563,21 @@ html:not([lang='en'])
 }
 
 #pp-toggles > .pp-header-row .pp-collapse-btn {
+  width: 20px;
+  height: 20px;
+  border-radius: 6px;
+  font-size: 12px;
+  padding: 0;
+}
+
+/* In the default theme Display's toggle matches the other panels' 22px. */
+:root:not([data-ui-theme='cyber'])
+  #pp-toggles
+  > .pp-header-row
+  .pp-collapse-btn {
   width: 22px;
   height: 22px;
-  border-radius: 6px;
   font-size: 13px;
-  padding: 0;
 }
 
 #pp-toggles.collapsed {