[bettodiaz]

Summary

Flow's edge handoff is off on a Wayland session because an ordinary client can't read the cursor. On KDE Plasma this adds a small KWin script that tells the agent when the cursor pushes into a screen edge, and places the cursor on arrival. It never captures input. Related to #2360, which only asks for a notice; this is the working path for KDE.

I tried the InputCapture portal first, but on KDE a live capture swallows all input system-wide until released, so I dropped it.

Changes

• openlogi-core: a virtual absolute pointer device, OL pointer placement.
• openlogi-hook: serves org.openlogi.Edge on the session bus, reads the screen layout from xdg-output, and moves the cursor with the virtual pointer. The script lives in crates/openlogi-hook/kwin-script/.
• openlogi-agent-core: a third pointer mode for KDE Wayland that turns an edge call into the same crossing the polling thread reports, places the cursor on arrival, and ignores edge calls for 1 s after a placement so the cursor can't bounce straight back.

Testing

• cargo fmt --all -- --check, cargo test --workspace (4777 passed), rustdoc for the non-GUI crates: pass.
• cargo clippy --workspace --all-targets -- -D warnings: fails on 8 map_unwrap_or lints in openlogi-core files this PR doesn't touch (Rust 1.100). Clean on the crates this PR changes.
• Not run: ast-grep, typos, cargo-deny, the macOS and Windows jobs, the wasm check.
• Hardware: verified live on one KDE Plasma 6.8 Wayland laptop (stepped two-display layout) with a Mac peer, for handoffs to the Mac and returns to the laptop. Not tested on GNOME or wlroots, or with other layouts.

Known limits: KDE only, the script has to be installed and enabled by hand, and "require Control" can't be honoured on Wayland.