chore(map-editor): bump to v0.3.0; cheatsheet + README sync

Updates the in-editor Cheatsheet to reflect the new G binding and
the Esc cascade; bumps manifest.module and the file header to
v0.3.0; adds a Menu UI section to README.md.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

README.md

@@ -113,3 +113,21 @@ SPOREL_CI=1 ./Sporel.exe --module=map-editor   # exits with rc=0 after ~0.5 s
 - Design paper: `docs/design/2026-05-28-autotile-blob-styles-design.md`
   §11 in `sporel-meta`
 - Plan: `docs/superpowers/plans/2026-05-28-map-editor-blob-v2.md`
+
+## Menu UI (v0.3.0)
+
+Top toolbar replaced with a seven-category menu bar (File, Edit, View,
+Map, Tools, Window, Help) plus a sticky two-segment Mode-pill on the
+right end. Item types: action, modal, toggle, submenu, separator;
+items can be conditionally disabled. A single-stack modal framework
+hosts the existing Cheatsheet (I) and three new modals: Save As, Map
+Properties (read-only), About. The Esc key cascades modal -> menu ->
+quit.
+
+New Map and Open Map appear in the File menu as disabled placeholders
+pending a v3-aware maps.create and an engine.asset.list_dir in a
+future engine + lib slice.
+
+All previous hotkeys (Tab, S, E, R, H, 0, D, G, I, Esc) continue to
+work; their bindings are documented in the items where applicable
+and in the in-editor Cheatsheet modal.

init.lua

@@ -1,4 +1,4 @@
--- sporel-module-map-editor v0.2.0c.4
+-- sporel-module-map-editor v0.3.0
 -- Interactive map editor — Rev 4 UX architecture (see design paper
 -- 2026-05-28-autotile-blob-styles-design.md §11 + plan stub
 -- 2026-05-28-map-editor-blob-v2.md). 0.2.0b adds the bottom palette
@@ -591,19 +591,20 @@ local ui = (function()
         { key="I",     action="Show / hide this cheatsheet" },
         { key="S",     action="Save current map to work.map.json" },
         { key="E",     action="Erase tile at mouse cell" },
-        { key="R",     action="Cycle tile rotation 0->90->180->270 (Direct-mode override)" },
+        { key="R",     action="Cycle tile rotation 0->90->180->270 (Direct only)" },
-        { key="H",     action="Toggle tile flip 0<->1 (Direct-mode override)" },
+        { key="H",     action="Toggle tile flip 0<->1 (Direct only)" },
         { key="0",     action="Reset transform (rot=0, flip=0)" },
         { key="D",     action="Toggle debug overlay (per-cell slot/rot labels)" },
-        { key="G",     action="Toggle world overlay (Auto-Tile: map-grid + dots; Direct: cell-grid)" },
+        { key="G",     action="Toggle world overlay" },
-        { key="Esc",   action="Quit editor" },
+        { key="Esc",   action="Close modal / close menu / quit" },
-        { key="LMB-drag canvas (Auto-Tile)", action="Stroke-paint vertices (any-corner fill)" },
+        { key="LMB on menu category",        action="Open dropdown" },
-        { key="RMB-drag canvas (Auto-Tile)", action="Stroke-clear vertices" },
+        { key="LMB-drag canvas (Auto-Tile)", action="Stroke-paint map-tiles (any-corner fill)" },
+        { key="RMB-drag canvas (Auto-Tile)", action="Stroke-clear map-tiles" },
         { key="LMB-drag canvas (Direct)",    action="Stroke-paint cells (override with slot+rot+flip)" },
         { key="RMB-drag canvas (Direct)",    action="Stroke-clear overrides" },
-        { key="LMB on palette swatch",     action="Select slot (1-14) as active tile" },
+        { key="LMB on palette swatch",       action="Select slot (1-14) as active tile" },
-        { key="RMB on Layer row",          action="Toggle layer visibility" },
+        { key="RMB on Layer row",            action="Toggle layer visibility" },
-        { key="LMB on Layer row",          action="Set as active layer" },
+        { key="LMB on Layer row",            action="Set as active layer" },
     }
 
     -- =====================================================================
@@ -1455,7 +1456,7 @@ input.bind("reset_transform",   { "0" })     -- 0.2.0c
 input.bind("toggle_debug_overlay", { "d" })  -- 0.2.0c.3
 input.bind("toggle_world_overlay", { "g" })  -- 0.2.0c.4
 
-engine.print("map-editor v0.2.0c.4: ready. Tab=mode, I=help, G=grid, D=debug, S=save, E=erase, R=rotate, H=flip, 0=reset, ESC=quit")
+engine.print("map-editor v0.3.0: ready. Tab=mode, I=help, G=grid, D=debug, S=save, E=erase, R=rotate, H=flip, 0=reset, ESC=quit / close")
 
 -- =====================================================================
 -- Frame hooks

manifest.module

@@ -1,6 +1,6 @@
 {
     "id": "map-editor",
-    "version": "0.2.0c.4",
+    "version": "0.3.0",
     "kind": "module",
     "api": "^0.1",
     "ci_frames": 30,