release: bump version to 0.31.0

frontend/public/earth/css/hud.css

@@ -279,18 +279,8 @@
   font-weight: 600;
 }
 
-.hud-error-message {
-  color: #ff4444;
-  margin-top: 10px;
-  font-size: 0.9rem;
-  display: none;
-  padding: 10px;
-  background-color: rgba(255, 68, 68, 0.1);
-  border-radius: 5px;
-  border-left: 3px solid #ff4444;
-}
-
-.earth-status-message {
+.earth-status-message,
+.earth-error-message {
   position: absolute;
   top: calc(20px * var(--hud-scale));
   left: 50%;
@@ -325,11 +315,18 @@
     opacity 0.28s ease;
 }
 
-.earth-status-message.visible {
+.earth-status-message.visible,
+.earth-error-message.visible {
   transform: translate(-50%, 0);
   opacity: 1;
 }
 
+.earth-error-message {
+  top: calc(62px * var(--hud-scale));
+  z-index: 211;
+  min-width: min(calc(220px * var(--hud-scale)), 58vw);
+}
+
 /* ── Indicator: single dot (transient) or three dots (loading) ── */
 
 .earth-status-indicator {
@@ -541,7 +538,7 @@
 
 .earth-settings-kicker {
   color: var(--hud-text-soft);
-  font-size: var(--hud-kicker-size);
+  font-size: var(--hud-panel-header-title-size);
   letter-spacing: 0.16em;
   text-transform: uppercase;
 }
@@ -634,6 +631,52 @@
   gap: 14px;
 }
 
+.earth-settings-segmented {
+  display: inline-flex;
+  align-self: flex-start;
+  padding: 4px;
+  border-radius: 999px;
+  background:
+    linear-gradient(180deg, rgba(255, 255, 255, 0.06), transparent),
+    rgba(255, 255, 255, 0.03);
+  border: 1px solid rgba(212, 227, 244, 0.08);
+  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
+  gap: 4px;
+}
+
+.earth-settings-segmented-btn {
+  border: 0;
+  background: transparent;
+  color: var(--hud-text-soft);
+  padding: 8px 14px;
+  border-radius: 999px;
+  font: inherit;
+  font-size: 0.82rem;
+  font-weight: 600;
+  letter-spacing: 0.02em;
+  cursor: pointer;
+  transition:
+    background 0.18s ease,
+    color 0.18s ease,
+    box-shadow 0.18s ease,
+    transform 0.18s ease;
+}
+
+.earth-settings-segmented-btn:hover {
+  color: var(--hud-text);
+  transform: translateY(-1px);
+}
+
+.earth-settings-segmented-btn.is-active {
+  color: var(--hud-title);
+  background:
+    radial-gradient(circle at 35% 22%, rgba(255, 255, 255, 0.22), transparent 58%),
+    linear-gradient(180deg, rgba(121, 159, 207, 0.2), rgba(72, 101, 139, 0.26));
+  box-shadow:
+    inset 0 1px 0 rgba(255, 255, 255, 0.08),
+    0 8px 18px rgba(0, 0, 0, 0.2);
+}
+
 .earth-settings-slider {
   flex: 1 1 auto;
   width: 100%;