Vela 0.4.911

What's changed in 0.4.911

• Fix doc drift from the fork port: keep the multi-engine KDoc and drop fork-relative references
• Downloads keep running when you leave the app
• Logo final: two-tone nav chevron
• Logo take two: a proper sailboat, no star
• New logo: two-tone sail mark on a teal gradient, everywhere
• Use a lot less memory, and give it back when the system asks
• Voice search says why it failed, and a corrupt speech model no longer crash-loops the app

Full changelog: v0.4.901...v0.4.911