b2451e6aea
The re-architected Linux client is now two binaries: the punktfunk-client shell execs its sibling punktfunk-session (ash/Vulkan presenter + Skia console UI) for --connect/--browse. The Decky plugin's stream and browse paths launch the shell with exactly those flags, but the flatpak built and installed only the shell, so streaming and the gamepad library from the Deck failed at exec with "punktfunk-session: No such file" (pair/wake/library still worked — the shell handles them in-process). Build and install both binaries. The session binary pulls in Skia (skia-safe), whose build script downloads a prebuilt libskia — dead in the offline sandbox — so point skia-bindings at a pinned, vendored archive via SKIA_BINARIES_URL=file:// (read directly, no curl); the tarball rides along as a sha256-pinned flatpak source. Widen the flatpak CI path filters to the session binary's crates (linux-session, pf-presenter, pf-console-ui, pf-client-core) and fix the moved library.rs path in the Decky error-classifier comment. All other plugin↔client contracts (flags, pairing/library output, config files, env vars, exit codes, the 47990 mgmt port) already match — no changes needed. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>