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/app/package.json

@@ -32,6 +32,11 @@
     "build:terminal-webview": "node ./scripts/build-terminal-webview-html.mjs"
   },
   "dependencies": {
+    "@codemirror/commands": "6.10.4",
+    "@codemirror/language": "6.12.4",
+    "@codemirror/search": "6.7.1",
+    "@codemirror/state": "6.7.1",
+    "@codemirror/view": "6.43.6",
     "@dnd-kit/core": "^6.3.1",
     "@dnd-kit/sortable": "^10.0.0",
     "@dnd-kit/utilities": "^3.2.2",
@@ -46,6 +51,7 @@
     "@react-native-masked-view/masked-view": "^0.3.2",
     "@react-native/normalize-colors": "^0.81.5",
     "@react-navigation/native": "^7.1.8",
+    "@replit/codemirror-vim": "6.3.0",
     "@tanstack/react-query": "^5.90.11",
     "@tanstack/react-virtual": "^3.13.21",
     "@xterm/addon-clipboard": "^0.3.0-beta.213",