## Summary

Remove the unsupported `--return-xpath` option from Browse's coordinate
click, hover, scroll, and drag commands. The CLI rejects the flag, and
strict driver schemas reject stale `returnXPath` payloads before
performing a mouse action. Update the examples and the Browse minor
changeset for the V4 migration and flag removal.

XPath selectors and snapshot `xpathMap` remain supported.

## Scope

The cursor overlay (#2869) and network sidecar (#2849) are already
merged into `main`. This branch includes the final parent and reconciles
its squash merge, preserving the current cursor fixes. The final diff
against `main` is **8 files, +17/−62**, limited to the XPath flag
removal, documentation, removal of the obsolete XPath test, and release
metadata.

## Validation

- At `db5e592ce4359e1340ef4e921aad4b98581ee94a`: focused driver-command
suite **28 tests passed** with an isolated daemon directory;
changed-file formatting and ESLint, Browse TypeScript checks, and `git
diff --check` passed.
- Production code is unchanged from
`c15d1ef8ca8a53a25a2f5f05722ef45df9a89605`, which passed a frozen
install, fresh extension/SDK/Browse builds, Browse formatting/lint/type
checks, changeset validation, and the full **28-file / 397-test** Browse
suite.
- Built CLI smoke checks at that production-code head: `--return-xpath`
was absent from all four mouse help pages; passing it to each command
exited 2 with `Nonexistent flag`, without starting a daemon.
- Confirmed the final network parent and its squash merge have identical
trees, and the squash reconciliation did not change the resolved files.