unified-exec: retain PathUri in command events (#28780)

## Why

App-server must report command events containing foreign-platform paths
without changing existing client or rollout path-string formats.

## What changed

- retain `PathUri` through exec command begin/end events
- convert cwd values to `LegacyAppPathString` at the app-server
compatibility boundary
- drop command actions with foreign paths and log them
- serialize rollout-trace cwd values using their inferred native path
representation
- restore Wine coverage for retained Windows cwd values and successful
completion

codex-rs/tui/src/app/agent_status_feed_tests.rs

@@ -12,7 +12,9 @@ fn agent_status_uses_bounded_buffered_activity() {
             item: ThreadItem::CommandExecution {
                 id: "command-1".to_string(),
                 command: "cargo test -p codex-tui".to_string(),
-                cwd: AbsolutePathBuf::try_from("/workspace").expect("absolute path"),
+                cwd: AbsolutePathBuf::try_from("/workspace")
+                    .expect("absolute path")
+                    .into(),
                 process_id: None,
                 source: CommandExecutionSource::Agent,
                 status: CommandExecutionStatus::Completed,

codex-rs/tui/src/app/pending_interactive_replay.rs

@@ -619,7 +619,7 @@ mod tests {
                 reason: None,
                 network_approval_context: None,
                 command: Some("echo hi".to_string()),
-                cwd: Some(test_path_buf("/tmp").abs()),
+                cwd: Some(test_path_buf("/tmp").abs().into()),
                 command_actions: None,
                 additional_permissions: None,
                 proposed_execpolicy_amendment: None,

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

@@ -4697,7 +4697,7 @@ fn exec_approval_request(
             reason: Some("needs approval".to_string()),
             network_approval_context: None,
             command: Some("echo hello".to_string()),
-            cwd: Some(test_path_buf("/tmp/project").abs()),
+            cwd: Some(test_path_buf("/tmp/project").abs().into()),
             command_actions: None,
             additional_permissions: None,
             proposed_execpolicy_amendment: None,

codex-rs/tui/src/app/thread_events.rs

@@ -492,7 +492,7 @@ mod tests {
                 reason: Some("needs approval".to_string()),
                 network_approval_context: None,
                 command: Some("echo hello".to_string()),
-                cwd: Some(test_path_buf("/tmp/project").abs()),
+                cwd: Some(test_path_buf("/tmp/project").abs().into()),
                 command_actions: None,
                 additional_permissions: None,
                 proposed_execpolicy_amendment: None,