Consolidate duplicated editor code, trim comments, refresh README

Split GraphCanvas (1076 -> 831 lines) into EdgeLayer and graphMenus;
the port and marker menus were the same list and are now one function.
Value specs of the inspector and the list tab share valueSpecs.ts, and
the remaining copies (compound commands, type glyphs, typed asset
lookup, name rule, play/editor world setup, marquee) are merged.

Four copies had already drifted apart; merging them fixes:
- "Disconnect N links" in the port menu is one undo step, not N
- "+ Add collider" is hidden on a placed container instance, as in
  the hierarchy menu, instead of always failing
- a bool property coerced from the text "false" becomes false
- a port command on an unknown node type reports instead of crashing

Comment-only edits leave the bundle byte-identical. README corrected in
35 places (step limit, jump-run clock, suite duration, 409 body, ...).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

tests/core/node-catalog.test.ts

@@ -55,7 +55,7 @@ const pointer = (overrides: Partial<NodeContext['pointer']>): Partial<NodeContex
 });
 
 const CASES: Record<string, Case[]> = {
-  // --- flow ------------------------------------------------------------------------------------
+  // flow
 
   Branch: [
     { name: 'true takes then', inputs: { condition: true }, next: 'then' },
@@ -103,7 +103,7 @@ const CASES: Record<string, Case[]> = {
     },
   ],
 
-  // --- variables -------------------------------------------------------------------------------
+  // variables
 
   GetVariable: [
     { name: 'reads a variable', params: { variable: 'speed' }, outputs: { value: 100 } },
@@ -151,7 +151,7 @@ const CASES: Record<string, Case[]> = {
     },
   ],
 
-  // --- references and properties ----------------------------------------------------------------
+  // references and properties
 
   Self: [{ name: 'outputs the behavior object', outputs: { object: fakeContext().self } }],
   Owner: [
@@ -237,7 +237,7 @@ const CASES: Record<string, Case[]> = {
     },
   ],
 
-  // --- literals and math -------------------------------------------------------------------------
+  // literals and math
 
   Number: [
     { name: 'outputs its setting', params: { value: 7.5 }, outputs: { value: 7.5 } },
@@ -306,7 +306,7 @@ const CASES: Record<string, Case[]> = {
     },
   ],
 
-  // --- text and comparison -----------------------------------------------------------------------
+  // text and comparison
 
   ToText: [
     { name: 'formats with decimals', inputs: { value: 12.345, decimals: 1 }, outputs: { text: '12.3' } },
@@ -334,7 +334,7 @@ const CASES: Record<string, Case[]> = {
       outputs: { text: 'b' },
     },
   ],
-  // --- lists -----------------------------------------------------------------------------------
+  // lists
 
   List: [
     { name: 'hands out the list it was given', params: { value: [1, 2, 3] }, outputs: { value: [1, 2, 3] } },
@@ -461,7 +461,7 @@ const CASES: Record<string, Case[]> = {
     { name: '"0" as text counts as false', inputs: { value: '0' }, outputs: { result: true } },
   ],
 
-  // --- vectors and input --------------------------------------------------------------------------
+  // vectors and input
 
   Length: [
     { name: '3-4-5 triangle', inputs: { x: 3, y: 4 }, outputs: { result: 5 } },
@@ -585,7 +585,7 @@ const CASES: Record<string, Case[]> = {
     },
   ],
 
-  // --- actions --------------------------------------------------------------------------------------
+  // actions
 
   Move: [
     {