Merge pull request #6189 from dotCooCoo/feat/js-builtins-core

JavaScript: vectorcraft-js adds ES5 Object, Array, Math, JSON and Function.prototype.bind

docs/target-app-parity.md

@@ -693,8 +693,9 @@ Moved from the ROADMAP's "Shipped so far" on 2026-10-10. Update it when a featur
   - Headless CLI (`vectorcraft-cli run`, `convert`, `info`, `bench`, `perf`, `mcp`). A `run` step, like a `command_batch` step over MCP, can use an earlier step's result (`"$1.id"`, #785); `run --commands FILE` (or `-` for standard input) reads the steps from a JSON array or JSON Lines, past the Windows command-line limit (#3147, `apps/vectorcraft-cli/tests/it/cli.rs` `run_reads_*`, `run_refuses_malformed_commands_naming_the_step`).
   - File › Scripts › Check Script… reads a script written for Illustrator (`.jsx`, `.jsxinc` or a compiled `.jsxbin`) without running any of it and reports what it needs (the document model, files, dialogs, menu commands, features only Illustrator has), what it would do outside the document, the menu commands and document-model members it uses, its directives and included files, and the problems that would stop it loading (`script.check`, which also reads `.js` files); File › Open and drag-and-drop show the report for `.jsx`, `.jsxinc` and `.jsxbin` files.
   - `vectorcraft-js` parses JavaScript as ECMAScript 5.1 defines it, with the legacy octal forms, block functions and lenient regular expressions of Annex B, into a syntax tree with source spans; it reads the `#target`, `#include` and other preprocessor lines as directives without running them, and a script that breaks the grammar or an early-error rule gives a `SyntaxError` with its line and column. Nesting past the parser's depth limit (`Options::max_depth`, 200 by default) gives a `SyntaxError` instead of exhausting the stack. `cargo xtask test262` fetches the conformance suite at a pinned commit and parses its ES5 tests: 5,411 of 5,418 runs pass (the 7 others use `let` and `const`). This entry covers parsing; the next entry covers running scripts. Tests: `crates/js/src/tests.rs`, `crates/engine/tests/it/js_lexer_vs_scriptcheck.rs`.
-  - `vectorcraft-js`'s `Realm` runs ECMAScript 5.1 scripts: the parsed script compiles to verified bytecode that a non-recursive interpreter runs, with closures, `this`, `arguments`, `with`, direct and indirect `eval`, `new Function`, `try`/`catch`/`finally`, labeled `break` and `continue`, and `for`-`in` in insertion order, over a mark-and-sweep heap. Built-ins are limited to `Object`, `Function` with `call` and `apply`, `eval` and the error types. Every run is bounded by fuel, heap bytes, frames, nested host calls and an interrupt flag (smaller defaults in the wasm build), and a run that reaches a limit stops with a limit error that `try` cannot catch. `cargo xtask test262` also runs the suite's ES5 language tests that need only these built-ins: 3,074 of 3,078 runs pass (the 4 others expect the completion values of later editions). The app does not call it yet. Tests: `crates/js/src/interp_tests.rs`, `crates/js/tests/test262.rs`.
-  - `vectorcraft-js` has `String`, `Number`, `RegExp` and `Date` as ECMAScript 5.1 defines them (sections 15.5, 15.7, 15.9 and 15.10, https://262.ecma-international.org/5.1/), with Annex B's `substr`, `getYear`, `setYear` and `toGMTString`. `toFixed`, `toExponential` and `toPrecision` format a number from its exact decimal value, and `toString(radix)` writes any base from 2 to 36. Regular expressions (flags `g`, `i` and `m`) run on a backtracking matcher whose choice points and capture state count against the heap limit and which takes fuel for every step, so a catastrophic pattern stops at the fuel limit and 50,000 nested groups give a `SyntaxError` at the default depth limit. A string method that would build a string past the heap limit stops before it allocates. `Date` reads the clock and time zone the host sets (`Realm::set_clock`, `Realm::set_time_zone`; local time is UTC by default). `cargo xtask test262` runs the suite's `built-ins` tests for the four (https://github.com/tc39/test262): of the runs of the ES5 tests that need only the built-ins present, 1,113 of 1,169 pass for `String`, 262 of 262 for `Number`, 878 of 908 for `RegExp` and 6 of 6 for `Date`. The others need `Array` and `Boolean` methods, or expect later editions' rules (built-in functions whose `length` can be deleted, flags given with a RegExp object, a negative `lastIndex`, `RegExp.prototype` as a plain object, and `RegExp.prototype`'s `global`, `ignoreCase` and `multiline` properties that can be deleted). The ES5 language tests that can now run give 3,742 of 3,746 passing runs. Tests: `crates/js/src/text_tests.rs`, `crates/js/tests/test262.rs`.
+  - `vectorcraft-js`'s `Realm` runs ECMAScript 5.1 scripts: the parsed script compiles to verified bytecode that a non-recursive interpreter runs, with closures, `this`, `arguments`, `with`, direct and indirect `eval`, `new Function`, `try`/`catch`/`finally`, labeled `break` and `continue`, and `for`-`in` in insertion order, over a mark-and-sweep heap, with the built-ins the next two entries list. Every run is bounded by fuel, heap bytes, frames, nested host calls and an interrupt flag (smaller defaults in the wasm build), and a run that reaches a limit stops with a limit error that `try` cannot catch. `cargo xtask test262` also runs the suite's ES5 language tests that need only the built-ins present: 4,280 of 4,286 runs pass (4 of the others expect the completion values of later editions, and 2 expect a configurable function `length`). The app does not call it yet. Tests: `crates/js/src/interp_tests.rs`, `crates/js/tests/test262.rs`.
+  - `vectorcraft-js` provides the ECMAScript 5.1 built-ins `Object` with its property-descriptor functions, `create`, `keys`, `seal` and `freeze` (section 15.2), `Function.prototype.bind` (15.3.4.5), `Array` with every ES5 method (15.4), the error types (15.11), `Math` (15.8), `JSON` with revivers, replacers and indentation (15.12), and the global functions with Annex B's `escape` and `unescape` (15.1, B.2). The array methods work on array-like objects. A method visits only the indices that exist when its range is longer than 4,096 indices and more than 8 times the properties on the object and its prototypes, so `new Array(4294967295).join("")` ends at once; a shorter range is visited index by index, holes included, and each index takes fuel. `join` writes a cycle back to an array as an empty string, `JSON.stringify` throws a `TypeError` on a cycle, and deep `JSON` nesting uses no native stack. Every loop takes fuel and every result is checked against the heap limit. `cargo xtask test262` runs the suite's ES5 built-in tests that need only these built-ins: 6,798 of 6,866 runs pass (the 34 failing tests expect rules of later editions). It also fetches the `json2.js` polyfill at a pinned commit and checks that its `stringify` and `parse` agree with the built-in `JSON`. Tests: `crates/js/src/builtins_tests.rs`, `crates/js/tests/test262.rs`, `crates/js/tests/json2.rs`.
+  - `vectorcraft-js` has `String`, `Number`, `RegExp` and `Date` as ECMAScript 5.1 defines them (sections 15.5, 15.7, 15.9 and 15.10, https://262.ecma-international.org/5.1/), with Annex B's `substr`, `getYear`, `setYear` and `toGMTString`. `toFixed`, `toExponential` and `toPrecision` format a number from its exact decimal value, and `toString(radix)` writes any base from 2 to 36. Regular expressions (flags `g`, `i` and `m`) run on a backtracking matcher whose choice points and capture state count against the heap limit and which takes fuel for every step, so a catastrophic pattern stops at the fuel limit and 50,000 nested groups give a `SyntaxError` at the default depth limit. A string method that would build a string past the heap limit stops before it allocates. `Date` reads the clock and time zone the host sets (`Realm::set_clock`, `Realm::set_time_zone`; local time is UTC by default). `cargo xtask test262` runs the suite's `built-ins` tests for the four (https://github.com/tc39/test262): of the runs of the ES5 tests that need only the built-ins present, 1,379 of 1,411 pass for `String`, 298 of 298 for `Number`, 954 of 988 for `RegExp` and 8 of 8 for `Date`. The others expect later editions' rules (built-in functions whose `length` can be deleted, flags given with a RegExp object, a negative `lastIndex`, `RegExp.prototype` as a plain object, and `RegExp.prototype`'s `global`, `ignoreCase` and `multiline` properties that can be deleted). Tests: `crates/js/src/text_tests.rs`, `crates/js/tests/test262.rs`.
 - **UI:** Illustrator 2026 layout restyled to measured values:
   - Medium Dark theme, categorized and Advanced toolbars (a tool group's flyout opens on a right press, a long press or a press on its corner triangle), 35 pt document tabs, 33 pt panel tabs.
   - Hint bar, contextual task bar, 19 dock panels with ≡ menus.