feat(git): add upstream tracking and local-only branch UI

This release adds upstream tracking for branches and a local-only
indicator in the UI.
The Git integration now exposes upstreams and supports publish flows.
This enables publishing and remote-tracking configuration.

- Introduces upstream tracking and local-only branch UI markers
- Updates toolbar to reflect publish-local state and status indicators
- Bumps version to 2026.8.3 and updates changelog

src-tauri/src/git.rs

@@ -66,6 +66,7 @@ pub struct GitBranch {
     pub name: String,
     pub current: bool,
     pub remote: bool,
+    pub upstream: Option<String>,
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Serialize)]
@@ -842,7 +843,7 @@ fn branches_for_repo(repo: &Path) -> Result<Vec<GitBranch>, String> {
         repo,
         [
             "for-each-ref",
-            "--format=%(refname)\t%(HEAD)",
+            "--format=%(refname)\t%(HEAD)\t%(upstream:short)",
             "refs/heads",
             "refs/remotes",
         ],
@@ -851,9 +852,10 @@ fn branches_for_repo(repo: &Path) -> Result<Vec<GitBranch>, String> {
     let mut branches = Vec::new();
 
     for line in text.lines() {
-        let Some((ref_name, head_marker)) = line.split_once('\t') else {
-            continue;
-        };
+        let mut parts = line.splitn(3, '\t');
+        let ref_name = parts.next().unwrap_or_default();
+        let head_marker = parts.next().unwrap_or_default();
+        let configured_upstream = parts.next().unwrap_or_default().trim();
 
         let (name, remote) = if let Some(name) = ref_name.strip_prefix("refs/heads/") {
             (name, false)
@@ -870,6 +872,11 @@ fn branches_for_repo(repo: &Path) -> Result<Vec<GitBranch>, String> {
             name: name.to_string(),
             current: head_marker.trim() == "*",
             remote,
+            upstream: if remote || configured_upstream.is_empty() {
+                None
+            } else {
+                Some(configured_upstream.to_string())
+            },
         });
     }
 
@@ -6240,6 +6247,56 @@ mod tests {
         run_git_test(repo, ["commit", "-q", "-m", "init"]);
     }
 
+    #[test]
+    fn branches_report_configured_upstream_and_local_only_state() {
+        let repo = init_temp_repo("branch_upstream_state");
+        commit_initial_file(&repo.path);
+        run_git_test(&repo.path, ["branch", "feature/local-only"]);
+        run_git_test(&repo.path, ["branch", "feature/tracked"]);
+        run_git_test(&repo.path, ["remote", "add", "origin", "."]);
+        run_git_test(
+            &repo.path,
+            [
+                "update-ref",
+                "refs/remotes/origin/feature/published",
+                "HEAD",
+            ],
+        );
+        run_git_test(
+            &repo.path,
+            ["config", "branch.feature/tracked.remote", "origin"],
+        );
+        run_git_test(
+            &repo.path,
+            [
+                "config",
+                "branch.feature/tracked.merge",
+                "refs/heads/feature/published",
+            ],
+        );
+
+        let branches = branches_for_repo(&repo.path).expect("branches should load");
+        let local_only = branches
+            .iter()
+            .find(|branch| branch.name == "feature/local-only")
+            .expect("local-only branch should exist");
+        let tracked = branches
+            .iter()
+            .find(|branch| branch.name == "feature/tracked")
+            .expect("tracked branch should exist");
+        let remote = branches
+            .iter()
+            .find(|branch| branch.name == "origin/feature/published")
+            .expect("remote branch should exist");
+
+        assert_eq!(local_only.upstream, None);
+        assert_eq!(
+            tracked.upstream.as_deref(),
+            Some("origin/feature/published")
+        );
+        assert_eq!(remote.upstream, None);
+    }
+
     #[test]
     fn commit_notes_can_be_created_updated_and_deleted_without_changing_commit() {
         let repo = init_temp_repo("commit_notes_crud");

src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "Gitty",
-  "version": "2026.8.2",
+  "version": "2026.8.3",
   "identifier": "com.gitty",
   "build": {
     "beforeDevCommand": "npm run dev",