Edit workspace files directly on web (#2270)

* feat(files): edit workspace files on web

Keep source buffers synchronized with host file changes and require an explicit overwrite or reload when revisions diverge.

* feat(panels): surface and protect modified tabs

Expose tooltip and modification state through the generic panel boundary so tabs can show stable metadata and guard every close route consistently.

* fix(tests): use portable fake timeout handle

* fix(files): harden editor conflict handling

Preserve modified panel state across tab eviction, use precise revisions for optimistic writes, coalesce concurrent file watchers, and localize the editor interface.

* fix(files): close editor concurrency gaps

Coalesce clean reloads, preserve subscriber identities and file permissions, suspend pending saves during close confirmation, and carry precise revisions through file reads.

* test(files): expect read revision metadata

packages/highlight/src/index.ts

@@ -1,5 +1,11 @@
 export type { HighlightStyle, HighlightToken } from "./types.js";
-export { getParserForFile, isLanguageSupported, getSupportedExtensions } from "./parsers.js";
+export {
+  getLanguageForFile,
+  getParserForFile,
+  isLanguageSupported,
+  getSupportedExtensions,
+} from "./parsers.js";
+export { createCodeMirrorHighlightStyle } from "./syntax-roles.js";
 export { highlightCode, highlightLine } from "./highlighter.js";
 export { darkHighlightColors, lightHighlightColors } from "./colors.js";
 export type { SyntaxThemeId, SyntaxThemeOption, SyntaxColors } from "./themes.js";