feat: add level search bar to world map

Search by level name, subtitle, ID, or world name. Shows filtered
results as a flat grid with world.level numbering and world color.
Escape key clears search, clear button resets and refocuses input.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/game/WorldMap.jsx

@@ -1,4 +1,4 @@
-import React from 'react';
+import React, { useState, useRef } from 'react';
 import { WORLD_1 } from './levels/world1.js';
 import { WORLD_2 } from './levels/world2.js';
 import { WORLD_3 } from './levels/world3.js';
@@ -42,6 +42,21 @@ function isWorldUnlocked(world) {
 export default function WorldMap({ onSelectLevel, onSandbox, onAdmin }) {
   const totalStars = getTotalStars();
   const maxStars = getMaxStars();
+  const [search, setSearch] = useState('');
+  const searchRef = useRef(null);
+
+  const query = search.trim().toLowerCase();
+
+  // Build flat search results when there's a query
+  const searchResults = query ? worlds.flatMap((world, worldIdx) => {
+    return world.levels.map((level, idx) => ({ level, world, worldIdx, idx }))
+      .filter(({ level }) =>
+        level.title.toLowerCase().includes(query) ||
+        level.subtitle.toLowerCase().includes(query) ||
+        level.id.toLowerCase().includes(query) ||
+        world.name.toLowerCase().includes(query)
+      );
+  }) : [];
 
   return (
     <div className="gm-worldmap">
@@ -69,8 +84,64 @@ export default function WorldMap({ onSelectLevel, onSandbox, onAdmin }) {
         </div>
       </div>
 
-      {/* All worlds */}
-      {worlds.map((world, worldIdx) => {
+      {/* Search bar */}
+      <div className="gm-search-bar">
+        <span className="gm-search-icon">🔍</span>
+        <input
+          ref={searchRef}
+          className="gm-search-input"
+          type="text"
+          placeholder="Buscar nivel por nombre, mundo..."
+          value={search}
+          onChange={e => setSearch(e.target.value)}
+          onKeyDown={e => e.key === 'Escape' && (setSearch(''), searchRef.current?.blur())}
+        />
+        {search && (
+          <button className="gm-search-clear" onClick={() => { setSearch(''); searchRef.current?.focus(); }}>✕</button>
+        )}
+      </div>
+
+      {/* Search results */}
+      {query ? (
+        <div className="gm-search-results">
+          {searchResults.length === 0 ? (
+            <div className="gm-search-empty">No se encontraron niveles para "{search}"</div>
+          ) : (
+            <div className="gm-search-count">{searchResults.length} nivel{searchResults.length !== 1 ? 'es' : ''} encontrado{searchResults.length !== 1 ? 's' : ''}</div>
+          )}
+          <div className="gm-level-grid">
+            {searchResults.map(({ level, world, worldIdx, idx }) => {
+              const progress = getLevelProgress(level.id);
+              const levelUnlocked = isLevelUnlocked(level.id, world.levels) && isWorldUnlocked(world);
+              const stars = progress?.stars || 0;
+              const isBoss = idx === world.levels.length - 1;
+
+              return (
+                <div
+                  key={level.id}
+                  className={`gm-level-card ${levelUnlocked ? 'unlocked' : 'locked'} ${isBoss ? 'boss' : ''} ${stars === 3 ? 'perfect' : ''}`}
+                  onClick={() => levelUnlocked && onSelectLevel(level, world)}
+                >
+                  <div className="gm-level-number" style={{ color: world.color }}>{worldIdx + 1}.{idx + 1}</div>
+                  <div className="gm-level-info">
+                    <h3 className="gm-level-title">{level.title}</h3>
+                    <p className="gm-level-subtitle">{world.name} — {level.subtitle}</p>
+                  </div>
+                  {levelUnlocked ? (
+                    <Stars count={stars} />
+                  ) : (
+                    <span className="gm-lock">🔒</span>
+                  )}
+                  {!levelUnlocked && <div className="gm-lock-overlay" />}
+                </div>
+              );
+            })}
+          </div>
+        </div>
+      ) : (
+
+      /* All worlds (normal view) */
+      worlds.map((world, worldIdx) => {
         const unlocked = isWorldUnlocked(world);
         const worldStars = world.levels.reduce((s, l) => {
           const p = getLevelProgress(l.id);
@@ -136,7 +207,8 @@ export default function WorldMap({ onSelectLevel, onSandbox, onAdmin }) {
             </div>
           </div>
         );
-      })}
+      })
+      )}
     </div>
   );
 }