[Bug][Linux/Wayland] Window capture distorts aspect ratio, drops cursor/clicks, and cannot import .cap bundles via portal

[EtherealBless]

Description

On Linux (Wayland), screen recording encounters three significant limitations when capturing windows and managing projects:

1. Aspect Ratio Distortion: Capturing non-16:9 windows (e.g. mobile emulators in 9:16 portrait orientation) forces the stream into monitor bounds, stretching the window horizontally instead of preserving its native dimensions.
2. Missing Cursor & Click Telemetry: On Wayland, cursor capture stubbed out with empty events (moves: vec![], clicks: vec![]), completely disabling Cap's zoom/click wave features.
3. Project Import Failure: XDG Desktop Portal FileChooser does not recognize .cap directory bundles as selectable files, entering the folder rather than importing the project.

Reproduction

1. Run Cap on Linux under a Wayland session (tested on KDE Plasma 6).
2. Start a Window recording and select any non-16:9 window (e.g. Android Emulator / narrow browser window).
3. Notice that the resulting recording is stretched to 16:9.
4. Notice that mouse movements and click ripples are missing from the preview.
5. In Editor, try to "Add Clip" and pick a .cap recording folder - portal file picker navigates inside instead of selecting the project.

Additional Context

• Cap version: 0.6+
• Operating system, version: EndeavourOS / Arch Linux, KDE Plasma 6 (KWin Wayland)

Screenshots

[linear]

CAP-836