Initial commit: X-Plane G1000 web cockpit + bridge + Tauri desktop app

- server/: Node bridge (datarefs/commands, navdata, CIFP procedures, flight plan)
- web/: React cockpit (PFD/MFD/Map, VFR six-pack, AFCS, FMS CDU), PWA, collapsible sidebar
- desktop/: Tauri 2 launcher (Bun sidecar, system tray, updater) + Linux build via Docker
- scripts/: prep-desktop, build-linux, Gitea release + latest.json

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

desktop/Dockerfile.linux

@@ -0,0 +1,31 @@
+# Linux build image for the Tauri app (x86_64). Used to cross-build an AppImage
+# + .deb from the macOS dev machine via Docker (linux/amd64). The Node bridge
+# sidecar is compiled on the host by Bun, so this image only needs the Rust /
+# Tauri / GTK / WebKit toolchain.
+FROM rust:1-bookworm
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    libwebkit2gtk-4.1-dev \
+    libgtk-3-dev \
+    libayatana-appindicator3-dev \
+    librsvg2-dev \
+    libssl-dev \
+    libxdo-dev \
+    patchelf \
+    file \
+    wget \
+    curl \
+    xz-utils \
+    ca-certificates \
+    fuse \
+    desktop-file-utils \
+    xdg-utils \
+ && rm -rf /var/lib/apt/lists/*
+
+# Node + a GLOBAL Tauri CLI (so we never touch the mounted node_modules, which
+# holds the host/macOS CLI binary).
+RUN curl -fsSL https://deb.nodesource.com/setup_22.x | bash - \
+ && apt-get install -y nodejs && rm -rf /var/lib/apt/lists/* \
+ && npm install -g @tauri-apps/cli@2
+
+WORKDIR /work/desktop