feat(git): add multi-remote push with remote selection and fork-aware PR creation (#365)

* fix: Usage drop down should be scrollable

* fix: When there are multiple remotes, provide the user with an option of which branch to push to

* feat(gitview): add remote-push selection and auto checkout on create

* feat: enable selecting remote when creating PR

* fix: show PR icon in create button when not creating

* fix(pullrequest): drop remote picker and use explicit remote

* feat: add remote selection for PR status and creation

* fix: improve PR creation with selected remote and fork head

* chore(ui): simplify PR remote link UI

* fix(web): handle cross-repo PRs and branch validation

* feat: add remote selection for commit and push

* feat(git): delegate PR head source resolution to server

* chore(web): remove noisy PR creation logs

packages/ui/src/lib/api/types.ts

@@ -701,6 +701,10 @@ export type GitHubPullRequestCreateInput = {
   base: string;
   body?: string;
   draft?: boolean;
+  /** Remote to create the PR against (target repo, e.g., 'upstream' for forks) */
+  remote?: string;
+  /** Remote where the head branch lives (source repo, e.g., 'origin' for forks) */
+  headRemote?: string;
 };
 
 export type GitHubPullRequestUpdateInput = {
@@ -816,7 +820,7 @@ export interface GitHubAPI {
   authActivate(accountId: string): Promise<GitHubAuthStatus>;
   me?(): Promise<GitHubUserSummary>;
 
-  prStatus(directory: string, branch: string): Promise<GitHubPullRequestStatus>;
+  prStatus(directory: string, branch: string, remote?: string): Promise<GitHubPullRequestStatus>;
   prCreate(payload: GitHubPullRequestCreateInput): Promise<GitHubPullRequest>;
   prUpdate(payload: GitHubPullRequestUpdateInput): Promise<GitHubPullRequest>;
   prMerge(payload: GitHubPullRequestMergeInput): Promise<GitHubPullRequestMergeResult>;