Improve branch switch safety and recent branch status (#3302)

* feat(ui): block branch switches on dirty trees

* feat(ui): show unpushed commits in git branch selector

* feat(ui): show recent branches in git selector

* fix(ui): persist recent branch status

* feat(ui): add mobile branch picker

* fix(ui): guard mobile branch checkout

* fix(i18n): restore Turkish git empty state labels

* feat(ui): flag dirty draft directories on the branch selector

Replaces the draft dirty-directory banner with an indicator on the branch
selector: a warning icon plus a hover tooltip that opens by itself for five
seconds when the dirty state first appears, then stays hover-only. The copy
states the situation and the options (commit or worktree) without prescribing
either.

* feat(ui): optional push in the dirty branch switch dialog

Commit-and-switch gains an opt-in "Push after commit" checkbox. When the
push fails the commit stands but the switch is cancelled with an explicit
toast, so the user is never moved off a branch without knowing its push did
not happen. Without the checkbox the toast states the commit is local only.

* fix(i18n): align dirty-directory copy across locales

* fix(a11y): name the unpushed-commit badge in the branch picker

The badge showed a bare arrow and number with no accessible name or tooltip.
Both the desktop recents list and the mobile picker now carry a localized
"N commits not pushed" title and aria-label.

* fix(mobile): push before switching dirty branches

Honor the dirty-switch dialog's push option on the mobile Changes surface.
A failed push leaves the new commit on its source branch, refreshes state, and
cancels checkout. Mobile branch selection now also shows the existing dirty
switch notice.

packages/web/src/api/git.ts

@@ -23,6 +23,7 @@ export const createWebGitAPI = (): GitAPI => ({
   revertGitHunk: gitApiHttp.revertGitHunk,
   isLinkedWorktree: gitApiHttp.isLinkedWorktree,
   getGitBranches: gitApiHttp.getGitBranches,
+  getGitUnpushedBranchCounts: gitApiHttp.getGitUnpushedBranchCounts,
   deleteGitBranch: gitApiHttp.deleteGitBranch as GitAPI['deleteGitBranch'],
   deleteRemoteBranch: gitApiHttp.deleteRemoteBranch as GitAPI['deleteRemoteBranch'],
   removeRemote: gitApiHttp.removeRemote as GitAPI['removeRemote'],