Auto-commit extra files (#197)

Whenever Dyad does a commit from a proposal, it will automatically amend
the commit with outside changes (e.g. made outside of Dyad).

This helps avoid a lot of user confusion, e.g.
https://github.com/dyad-sh/dyad/issues/187

https://www.reddit.com/r/dyadbuilders/comments/1kjysc0/error_pushing_images/

Edge cases:
If a user adds a file outside of Dyad, and then they hit retry, it will
revert these outside changes, but it's still technically in the version
history, so I think it's OK. This should also be a pretty unusual
situation.

Fixes #164 
Fixes #187

src/ipc/handlers/chat_stream_handlers.ts

@@ -535,7 +535,8 @@ This conversation includes one or more image attachments. When the user uploads
           event.sender.send("chat:response:end", {
             chatId: req.chatId,
             updatedFiles: status.updatedFiles ?? false,
-            uncommittedFiles: status.uncommittedFiles,
+            extraFiles: status.extraFiles,
+            extraFilesError: status.extraFilesError,
           } satisfies ChatResponseEnd);
         } else {
           event.sender.send("chat:response:end", {

src/ipc/handlers/proposal_handlers.ts

@@ -30,6 +30,8 @@ import { extractCodebase } from "../../utils/codebase";
 import { getDyadAppPath } from "../../paths/paths";
 import { withLock } from "../utils/lock_utils";
 import { createLoggedHandler } from "./safe_handle";
+import { ApproveProposalResult } from "../ipc_types";
+
 const logger = log.scope("proposal_handlers");
 const handle = createLoggedHandler(logger);
 // Cache for codebase token counts
@@ -317,9 +319,7 @@ const getProposalHandler = async (
 const approveProposalHandler = async (
   _event: IpcMainInvokeEvent,
   { chatId, messageId }: { chatId: number; messageId: number },
-): Promise<{
-  uncommittedFiles?: string[];
-}> => {
+): Promise<ApproveProposalResult> => {
   // 1. Fetch the specific assistant message
   const messageToApprove = await db.query.messages.findFirst({
     where: and(
@@ -355,7 +355,10 @@ const approveProposalHandler = async (
     );
   }
 
-  return { uncommittedFiles: processResult.uncommittedFiles };
+  return {
+    extraFiles: processResult.extraFiles,
+    extraFilesError: processResult.extraFilesError,
+  };
 };
 
 // Handler to reject a proposal (just update message state)