Let users remember the working directory for resumed sessions (#33950)

## What changed

- Add `tui.resume_cwd` with `current` and `session` modes for resume and fork flows.
- Let users persist either mode directly from the working-directory prompt, while preserving one-time choices when no preference is configured.
- Apply the preference consistently during startup and in-app resume, honor explicit `--cd` overrides, and reject unsupported or unavailable directory choices with a clear error.

## Testing

- Cover configuration parsing and persistence, prompt behavior, startup and in-app flows, session metadata fallback, and remote workspace constraints.

GitOrigin-RevId: 7bf144c4b8c55bdb868cc8a71caf397c7740451a

codex-rs/core/src/config/mod.rs

@@ -43,6 +43,7 @@ use codex_config::types::MemoriesConfig;
 use codex_config::types::ModelAvailabilityNuxConfig;
 use codex_config::types::Notice;
 use codex_config::types::OAuthCredentialsStoreMode;
+use codex_config::types::ResumeCwdMode;
 use codex_config::types::SessionPickerViewMode;
 use codex_config::types::ToolSuggestConfig;
 use codex_config::types::ToolSuggestDisabledTool;
@@ -789,6 +790,10 @@ pub struct Config {
     /// Preferred layout for resume/fork session picker results.
     pub tui_session_picker_view: SessionPickerViewMode,
 
+    /// Working directory to use when resuming or forking a session.
+    /// When unset, prompt if the current and session directories differ.
+    pub tui_resume_cwd: Option<ResumeCwdMode>,
+
     /// Terminal resize-reflow tuning knobs.
     pub terminal_resize_reflow: TerminalResizeReflowConfig,
 
@@ -4118,6 +4123,7 @@ impl Config {
                 .as_ref()
                 .and_then(|t| t.session_picker_view)
                 .unwrap_or_default(),
+            tui_resume_cwd: cfg.tui.as_ref().and_then(|t| t.resume_cwd),
             terminal_resize_reflow,
             tui_keymap: cfg
                 .tui