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

---------

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

packages/ui/src/lib/btw.test.ts

@@ -1,5 +1,6 @@
 import { beforeEach, describe, expect, mock, test } from 'bun:test';
 import type { Message, Part, Session } from '@opencode-ai/sdk/v2';
+import type { StartBtwInput } from './btw';
 
 let forkSessionImpl: (sessionId: string, messageId?: string, directory?: string | null) => Promise<Session>;
 let getSessionMessagesImpl: (id: string, limit?: number, directory?: string | null) => Promise<Array<{ info: Message; parts: Part[] }>>;
@@ -213,6 +214,38 @@ describe('startBtwSession', () => {
     expect(sentParts).toEqual([[{ text: BTW_BOUNDARY_INSTRUCTION, synthetic: true }]]);
   });
 
+  test('the first question keeps inline comment context', async () => {
+    forkSessionImpl = () => Promise.resolve(makeSession('fork-1', '/project'));
+    const commentPart: NonNullable<StartBtwInput['additionalParts']>[number] = {
+      text: 'Comment on `src/auth.ts` lines 4-4:\n```ts\nauth();\n```\n\ncheck this',
+      synthetic: true,
+      metadata: {
+        openchamberContext: {
+          kind: 'code-comment',
+          source: 'file',
+          fileLabel: 'src/auth.ts',
+          startLine: 4,
+          endLine: 4,
+          language: 'ts',
+          code: 'auth();',
+          text: 'check this',
+        },
+      },
+    };
+    let sentParts: unknown;
+    sendMessageImpl = (...args) => {
+      sentParts = args[6];
+      return Promise.resolve();
+    };
+
+    await startBtwSession({ ...startInput, additionalParts: [commentPart] });
+
+    expect(sentParts).toEqual([
+      { text: BTW_BOUNDARY_INSTRUCTION, synthetic: true },
+      commentPart,
+    ]);
+  });
+
   test('an empty parent produces a marker without a boundary', async () => {
     forkSessionImpl = () => Promise.resolve(makeSession('fork-1', '/project'));
     getSessionMessagesImpl = () => Promise.resolve([]);