Swimchain Desktop v0.1.13-alpha (mainnet — chat layout fix)

Fixes the chat app being shoved off the top of the window when a space has many channels (channel list now scrolls internally; scroll-to-newest scrolls the message pane only, never the page). From PR #106. Carries the v0.1.12 unlock/connect fixes and the v0.1.11 full-bleed feed carousel.

SHA-256 (setup.exe): 7adca8b696c3081cdd53f91f97532e9028b25f0a32f3c7baa1e3404065f64e64