feat: add Vec<ParsedCommand> to ExecApprovalRequestEvent (#5222)

This adds `parsed_cmd: Vec<ParsedCommand>` to `ExecApprovalRequestEvent`
in the core protocol (`protocol/src/protocol.rs`), which is also what
this field is named on `ExecCommandBeginEvent`. Honestly, I don't love
the name (it sounds like a single command, but it is actually a list of
them), but I don't want to get distracted by a naming discussion right
now.

This also adds `parsed_cmd` to `ExecCommandApprovalParams` in
`codex-rs/app-server-protocol/src/protocol.rs`, so it will be available
via `codex app-server`, as well.

For consistency, I also updated `ExecApprovalElicitRequestParams` in
`codex-rs/mcp-server/src/exec_approval.rs` to include this field under
the name `codex_parsed_cmd`, as that struct already has a number of
special `codex_*` fields. Note this is the code for when Codex is used
as an MCP _server_ and therefore has to conform to the official spec for
an MCP elicitation type.

codex-rs/tui/src/chatwidget/tests.rs

@@ -392,6 +392,7 @@ fn exec_approval_emits_proposed_command_and_decision_history() {
         reason: Some(
             "this is a test reason such as one that would be produced by the model".into(),
         ),
+        parsed_cmd: vec![],
     };
     chat.handle_codex_event(Event {
         id: "sub-short".into(),
@@ -433,6 +434,7 @@ fn exec_approval_decision_truncates_multiline_and_long_commands() {
         reason: Some(
             "this is a test reason such as one that would be produced by the model".into(),
         ),
+        parsed_cmd: vec![],
     };
     chat.handle_codex_event(Event {
         id: "sub-multi".into(),
@@ -480,6 +482,7 @@ fn exec_approval_decision_truncates_multiline_and_long_commands() {
         command: vec!["bash".into(), "-lc".into(), long],
         cwd: std::env::current_dir().unwrap_or_else(|_| PathBuf::from(".")),
         reason: None,
+        parsed_cmd: vec![],
     };
     chat.handle_codex_event(Event {
         id: "sub-long".into(),
@@ -1317,6 +1320,7 @@ fn approval_modal_exec_snapshot() {
         reason: Some(
             "this is a test reason such as one that would be produced by the model".into(),
         ),
+        parsed_cmd: vec![],
     };
     chat.handle_codex_event(Event {
         id: "sub-approve".into(),
@@ -1360,6 +1364,7 @@ fn approval_modal_exec_without_reason_snapshot() {
         command: vec!["bash".into(), "-lc".into(), "echo hello world".into()],
         cwd: std::env::current_dir().unwrap_or_else(|_| PathBuf::from(".")),
         reason: None,
+        parsed_cmd: vec![],
     };
     chat.handle_codex_event(Event {
         id: "sub-approve-noreason".into(),
@@ -1569,6 +1574,7 @@ fn status_widget_and_approval_modal_snapshot() {
         reason: Some(
             "this is a test reason such as one that would be produced by the model".into(),
         ),
+        parsed_cmd: vec![],
     };
     chat.handle_codex_event(Event {
         id: "sub-approve-exec".into(),