fix: unsafe auto-approval of git commands (#10258)

fixes https://github.com/openai/codex/issues/10160 and some more.

## Description

Hardens Git command safety to prevent approval bypasses for destructive
or write-capable invocations (branch delete, risky push forms,
output/config-override flags), so these commands no longer auto-run as
“safe.”

- `git branch -d` variants (especially in worktrees / with global
options like -C / -c)
- `git show|diff|log --output` ... style file-write flags
- risky Git config override flags (-c, --config-env) that can trigger
external execution
- dangerous push forms that weren’t fully caught (`--force*`,
`--delete`, `+refspec`, `:refspec`)
- grouped short-flag delete forms (e.g. stacked branch flags containing
`d/D`)

will fast follow with a common git policy to bring windows to parity.

---------

Co-authored-by: Eric Traut <etraut@openai.com>

codex-rs/core/src/exec_policy.rs

@@ -1280,6 +1280,30 @@ prefix_rule(
         );
     }
 
+    #[tokio::test]
+    async fn dangerous_git_push_requires_approval_in_danger_full_access() {
+        let command = vec_str(&["git", "push", "origin", "+main"]);
+        let manager = ExecPolicyManager::default();
+        let requirement = manager
+            .create_exec_approval_requirement_for_command(ExecApprovalRequest {
+                features: &Features::with_defaults(),
+                command: &command,
+                approval_policy: AskForApproval::OnRequest,
+                sandbox_policy: &SandboxPolicy::DangerFullAccess,
+                sandbox_permissions: SandboxPermissions::UseDefault,
+                prefix_rule: None,
+            })
+            .await;
+
+        assert_eq!(
+            requirement,
+            ExecApprovalRequirement::NeedsApproval {
+                reason: None,
+                proposed_execpolicy_amendment: Some(ExecPolicyAmendment::new(command)),
+            }
+        );
+    }
+
     fn vec_str(items: &[&str]) -> Vec<String> {
         items.iter().map(std::string::ToString::to_string).collect()
     }