feat: ship manifest.launcher.md for master-detail launcher

render 0.2.0 added a transitive dep on lib-core.composition.
Engine resolver is strict-strcmp (no semver expansion), so
consumers must declare every transitive lib in deps[].

manifest.launcher.md

@@ -0,0 +1,17 @@
+---
+{"summary":"Map editor — vertical layer-chip overlay + atlas-tile picker","author":"calic","tags":["tool","map-editor"],"teaser_images":[]}
+---
+
+# Map Editor
+
+Click-to-paint tile editor with collapsible atlas/tile-picker. Vertical layer-chip overlay (left), atlas+tile picker (bottom-left), status chip (bottom-right).
+
+## Controls
+
+- Mouse-left on grid: paint
+- Mouse-left on layer-chip: switch active layer
+- Mouse-right on layer-chip: toggle visibility
+- E: erase mode
+- R: rotate
+- S: save
+- ESC: quit to launcher

manifest.module

@@ -1,6 +1,6 @@
 {
     "id": "map-editor",
-    "version": "0.3.1",
+    "version": "0.3.3",
     "kind": "module",
     "api": "^0.1",
     "ci_frames": 30,
@@ -10,7 +10,8 @@
     },
     "deps": [
         {"id":"lib-core.maps","version":"0.5.7"},
-        {"id":"lib-core.render","version":"0.1.0"},
+        {"id":"lib-core.render","version":"0.2.0"},
+        {"id":"lib-core.composition","version":"0.1.0"},
         {"id":"lib-core.camera","version":"0.3.0"},
         {"id":"lib-core.input","version":"0.4.0"},
         {"id":"lib-asset.prototype-blob-geom","version":"0.1.0"}