Add a TUI setting to disable automatic recaps (#42101)

## What changed

- Add the `tui.auto_recap` configuration option, enabled by default.
- When disabled, cancel scheduled automatic recap checks, reject automatic
  requests, and discard pending automatic results without retrying.
- Keep manual `/recap` requests available regardless of the setting.

## Testing

- Cover configuration defaults and command-line overrides.
- Cover scheduling cancellation, pending request cleanup, discarded results,
  and manual recaps while automatic recaps are disabled.

GitOrigin-RevId: 7d5323f58a2c84e60683a25a8c77653097efe6e2

codex-rs/core/config.schema.json

@@ -3810,6 +3810,11 @@
           "description": "Enable animations (welcome screen, shimmer effects, spinners). Defaults to `true`.",
           "type": "boolean"
         },
+        "auto_recap": {
+          "default": true,
+          "description": "Generate automatic conversation recaps when the terminal is unfocused. Defaults to `true`. Disabling this leaves `/recap` available on demand.",
+          "type": "boolean"
+        },
         "disable_paste_burst": {
           "description": "When true, disables burst-paste detection for typed input entirely. All characters are inserted as they are received, and no buffering or placeholder replacement will occur for fast keypress bursts. Overrides the legacy top-level `disable_paste_burst` setting. Defaults to `false`.",
           "type": "boolean"