Git identity from the settings for all agent shells, terminals and the git panel

Set GIT_AUTHOR_*/GIT_COMMITTER_* from Settings → Account → Git (also inside the
sandbox), so a repository's own user.name/user.email no longer wins; tell agents
not to change the git identity.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

server/src/terminal.rs

@@ -157,7 +157,12 @@ pub fn spawn(app: &Arc<App>, user: &User, cwd: &Path, session_id: Option<String>
             pty_process::Command::new("bwrap").env_clear().args(crate::sandbox::bwrap_args(&spec, cwd, &[], false, shell[0], &shell[1..]))
         }
         None => {
-            let c = pty_process::Command::new(shell[0]).args(&shell[1..]).current_dir(cwd).env("TERM", "xterm-256color").env("CODECRAFT", "1");
+            let c = pty_process::Command::new(shell[0])
+                .args(&shell[1..])
+                .current_dir(cwd)
+                .env("TERM", "xterm-256color")
+                .env("CODECRAFT", "1")
+                .envs(crate::gitcreds::identity_env(app, &user.id));
             match crate::gitcreds::global_config(app, user) {
                 Some(cfg) => c.env("GIT_CONFIG_GLOBAL", cfg),
                 None => c,