Add project and branch chat controls

src/app.rs

@@ -66,6 +66,7 @@ pub(crate) struct App {
     /// Unsaved sessions, keyed by project. A draft only becomes a `sessions` row
     /// when its first chat turn is stored, so empty ones vanish on restart.
     drafts: HashMap<i32, String>,
+    git_states: HashMap<i32, GitState>,
     #[cfg(target_os = "macos")]
     background_chats: HashMap<i32, ChatSnapshot>,
     /// Session whose quick-actions menu is open.
@@ -195,6 +196,25 @@ struct ChatSnapshot {
     skip_compaction_once: bool,
 }
 
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub(super) struct ProjectChoice {
+    id: i32,
+    name: String,
+}
+
+impl std::fmt::Display for ProjectChoice {
+    fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        formatter.write_str(&self.name)
+    }
+}
+
+#[derive(Clone, Debug)]
+pub(super) struct GitState {
+    pub(super) current: Option<String>,
+    pub(super) label: String,
+    pub(super) branches: Vec<String>,
+}
+
 #[cfg(target_os = "macos")]
 impl ChatSnapshot {
     fn needs_poll(&self) -> bool {
@@ -379,6 +399,8 @@ pub(crate) enum Message {
     ToggleProject(i32),
     DeleteProject(i32),
     CreateSession(i32),
+    DraftProjectChanged(i32),
+    SwitchGitBranch(String),
     DiscardSession(i32),
     SelectSession(i32, i32),
     RequestDeleteSession(i32),
@@ -456,6 +478,7 @@ impl App {
                         selected_project: last_project,
                         selected_session: None,
                         drafts,
+                        git_states: HashMap::new(),
                         #[cfg(target_os = "macos")]
                         background_chats: HashMap::new(),
                         session_menu: None,
@@ -588,6 +611,7 @@ impl App {
             selected_project: None,
             selected_session: None,
             drafts: HashMap::new(),
+            git_states: HashMap::new(),
             #[cfg(target_os = "macos")]
             background_chats: HashMap::new(),
             session_menu: None,
@@ -906,6 +930,9 @@ impl App {
                 }
             }
             Message::WindowOpened(id) => {
+                if id == self.main_window {
+                    self.refresh_git_state();
+                }
                 #[cfg(target_os = "macos")]
                 if id == self.main_window && self._native_menu.is_none() {
                     match crate::native_menu::install() {
@@ -1597,6 +1624,7 @@ impl App {
                                 self.background_chats.remove(&session_id);
                             }
                             self.drafts.remove(&project_id);
+                            self.git_states.remove(&project_id);
                             if self.config.interface.last_project_id == Some(project_id) {
                                 self.config.interface.last_project_id = None;
                                 let _ = self.config.save(&config_path());
@@ -1626,6 +1654,8 @@ impl App {
                     return focus_composer();
                 }
             }
+            Message::DraftProjectChanged(project_id) => self.move_draft_to_project(project_id),
+            Message::SwitchGitBranch(branch) => self.switch_git_branch(&branch),
             Message::DiscardSession(project_id) => self.discard_session(project_id),
             Message::OpenSessionMenu(session_id) => {
                 self.session_rename = None;