feat: add zone system to bosses and quests

apps/web/src/styles.css

@@ -1107,6 +1107,73 @@ body {
   font-size: 0.85rem;
 }
 
+/* ── Zone Selector ─────────────────────────────────────────────────────── */
+
+.zone-selector {
+  display: flex;
+  gap: 0.5rem;
+  margin-bottom: 1.25rem;
+  overflow-x: auto;
+  padding-bottom: 0.25rem;
+}
+
+.zone-tab {
+  align-items: center;
+  background: rgba(255, 255, 255, 0.05);
+  border: 1px solid rgba(147, 51, 234, 0.3);
+  border-radius: 0.5rem;
+  color: var(--colour-text-muted);
+  cursor: pointer;
+  display: flex;
+  flex-direction: column;
+  flex-shrink: 0;
+  font-family: inherit;
+  font-size: 0.8rem;
+  gap: 0.2rem;
+  padding: 0.6rem 1rem;
+  transition: all 0.2s;
+}
+
+.zone-tab:hover:not(:disabled) {
+  background: rgba(147, 51, 234, 0.15);
+  border-color: rgba(147, 51, 234, 0.6);
+  color: var(--colour-text);
+}
+
+.zone-tab-active {
+  background: rgba(147, 51, 234, 0.25);
+  border-color: var(--colour-primary);
+  color: var(--colour-text);
+}
+
+.zone-tab-locked {
+  cursor: not-allowed;
+  opacity: 0.45;
+}
+
+.zone-emoji {
+  font-size: 1.4rem;
+}
+
+.zone-name {
+  font-size: 0.75rem;
+  font-weight: 600;
+  text-align: center;
+}
+
+.zone-lock {
+  font-size: 0.7rem;
+}
+
+.empty-zone {
+  color: var(--colour-text-muted);
+  font-style: italic;
+  padding: 1rem 0;
+  text-align: center;
+}
+
+/* ── Loading / Error screens ───────────────────────────────────────────── */
+
 .loading-screen,
 .error-screen {
   align-items: center;