fix(cdp): report same-document SPA routes after clicks

[xrip]

Summary

• sync the virtual URL into the Rust page URL after click-driven history changes
• emit Page.frameNavigated for same-document route changes
• keep normal navigation handling unchanged

Source fork commit: 20d8b87.

Validation

• cargo check --release -p obscura-cdp --features render passed on the clean origin/main-based branch.