feat(chat): Comments and review in VS Code, like the OpenChamber desktop app (#1724)

* feat(chat): render code comments as cards instead of fenced text

* fix(vscode): route Add Comment to the active session editor panel

* fix(chat): persist queued inline comments and tighten file-chip path matching

* feat(vscode): comment on code from the editor

* fix(chat): keep attached context in the message and broadcast comment removal

* fix(vscode): hold every pending comment and gate both entry points on the workspace

* fix(vscode): let only the owning surface decide its comment threads

* fix(vscode): drop a comment removed while its delivery was still in flight

* test(vscode): cover the in-flight comment removal guard

* test(vscode): cover comment removal reaching every chat surface

* fix(vscode): give up on a comment the chat never confirmed holding

* fix(vscode): retract a comment everywhere before reporting it discarded

* fix(chat): preserve queued comment cards

* fix: preserve inline comment context across send paths

* fix(chat): preserve command routing with context

* fix(chat): keep unavailable actions on normal send path

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Co-authored-by: Bohdan Triapitsyn <artmore@protonmail.com>

packages/vscode/package.nls.json

@@ -10,6 +10,9 @@
   "command.openNewSessionInEditor.title": "Open New Session in Editor",
   "command.openCurrentOrNewSessionInEditor.title": "Open Session in Editor",
   "command.addToContext.title": "Add to Context",
+  "command.addLineComment.title": "Add Comment",
+  "command.submitLineComment.title": "Comment",
+  "command.removeLineComment.title": "Remove Comment",
   "command.explain.title": "Explain",
   "command.improveCode.title": "Improve Code",
   "command.newSession.title": "New Session",