fix(git): disable pull/push like TS (no remote / nothing ahead)

Pull/push always looked enabled. Plumb the ahead count (op-git status
already computes it) onto GitPanelState via the host snapshot, and gate the
buttons in paint AND hit-test: pull needs a remote + no in-flight op; push
also needs ahead > 0 (TS pullDisabled=!hasRemote||busy, push adds ahead===0).
has_remote derives from the existing remotes list.

crates/op-editor-core/src/editor_ui_state.rs

@@ -413,6 +413,9 @@ pub struct GitPanelState {
     pub branch_create_focused: bool,
     /// Number of changed (dirty) files in the working tree.
     pub dirty_count: usize,
+    /// Commits the current branch is ahead of its upstream — gates the
+    /// Push button (TS disables Push when `ahead === 0`).
+    pub ahead: u32,
     /// Number of files with unresolved merge conflicts.
     pub conflicted_count: usize,
     /// Whether a merge is in progress — drives the panel's conflict

crates/op-editor-ui/src/widgets/git_panel_ready.rs

@@ -140,6 +140,18 @@ impl GitPanel<'_> {
         !self.state.commit_message.trim().is_empty()
     }
 
+    /// Whether Pull can fire — a configured remote and no in-flight
+    /// pull / push (TS `pullDisabled = !hasRemote || busy`).
+    fn pull_enabled(&self) -> bool {
+        !self.state.remotes.is_empty() && !self.state.pulling && !self.state.pushing
+    }
+
+    /// Whether Push can fire — Pull's conditions plus `ahead > 0` (TS
+    /// also disables Push when up-to-date, `ahead === 0`).
+    fn push_enabled(&self) -> bool {
+        self.pull_enabled() && self.state.ahead > 0
+    }
+
     /// Paint the ready view.
     pub(super) fn paint_ready(&self, cx: &mut PaintCx<'_>, rect: Rect) {
         let t = self.theme;
@@ -200,8 +212,8 @@ impl GitPanel<'_> {
 
         // Pull / Push / Overflow icon buttons.
         let (pull_r, push_r, overflow_r) = self.ready_header_buttons(rect);
-        self.paint_ready_icon(cx, pull_r, Icon::ArrowDown, !self.state.pulling);
-        self.paint_ready_icon(cx, push_r, Icon::ArrowUp, !self.state.pushing);
+        self.paint_ready_icon(cx, pull_r, Icon::ArrowDown, self.pull_enabled());
+        self.paint_ready_icon(cx, push_r, Icon::ArrowUp, self.push_enabled());
         // Overflow `…` — TS colors this `text-muted-foreground` at size 13,
         // dimmer than the pull / push glyphs (git-panel-header.tsx:127-129).
         let overflow_s = 13.0;
@@ -431,10 +443,10 @@ impl GitPanel<'_> {
         if contains(self.ready_branch_rect(rect), point) {
             return Some(GitPanelHit::BranchPicker);
         }
-        if contains(pull, point) {
+        if self.pull_enabled() && contains(pull, point) {
             return Some(GitPanelHit::Pull);
         }
-        if contains(push, point) {
+        if self.push_enabled() && contains(push, point) {
             return Some(GitPanelHit::Push);
         }
         if contains(self.ready_commit_box(rect), point) {

crates/op-editor-ui/src/widgets/git_panel_tests.rs

@@ -196,6 +196,10 @@ fn ready_view_maps_each_header_and_commit_region() {
     let s = state_with(GitPanelState {
         branch: Some("main".to_string()),
         commit_message: "ship it".to_string(),
+        // A remote + commits-ahead so pull/push are enabled (they now
+        // disable when there's no remote / nothing to push, TS parity).
+        remotes: vec!["origin → https://example.com/r.git".to_string()],
+        ahead: 1,
         ..open_repo()
     });
     let panel = GitPanel::for_editor(&s).unwrap();

crates/op-host-desktop/src/git_host.rs

@@ -70,6 +70,7 @@ impl DesktopApp {
             || panel.branch != snap.branch
             || panel.branches != snap.branches
             || panel.dirty_count != snap.dirty_count
+            || panel.ahead != snap.ahead
             || panel.conflicted_count != snap.conflicted_count
             || panel.merging != snap.merging
             || panel.conflicted_files != snap.conflicted_files
@@ -80,6 +81,7 @@ impl DesktopApp {
         panel.branch = snap.branch;
         panel.branches = snap.branches;
         panel.dirty_count = snap.dirty_count;
+        panel.ahead = snap.ahead;
         panel.conflicted_count = snap.conflicted_count;
         panel.merging = snap.merging;
         panel.conflicted_files = snap.conflicted_files;

crates/op-host-desktop/src/git_jobs.rs

@@ -22,6 +22,8 @@ pub struct GitSnapshot {
     pub branches: Vec<String>,
     /// Changed-file count.
     pub dirty_count: usize,
+    /// Commits ahead of the upstream — gates the Push button.
+    pub ahead: u32,
     /// Conflicted-file count.
     pub conflicted_count: usize,
     /// Whether a merge is in progress.
@@ -112,6 +114,7 @@ fn snapshot(repo: &GitRepo) -> GitSnapshot {
         .collect();
     let status = repo.status().ok();
     let dirty_count = status.as_ref().map(|s| s.files.len()).unwrap_or(0);
+    let ahead = status.as_ref().map(|s| s.ahead).unwrap_or(0);
     let conflicted_count = status
         .as_ref()
         .map(|s| {
@@ -156,6 +159,7 @@ fn snapshot(repo: &GitRepo) -> GitSnapshot {
         branch,
         branches,
         dirty_count,
+        ahead,
         conflicted_count,
         merging,
         conflicted_files,