Self-hosted CLI tool for saving files, images, and links.

• make release — bumps patch tag, builds both binaries (run this before deploying)
• make release minor / make release major — for non-patch bumps
• make deploy — builds and restarts server (no version bump); always run make release first
• make install-server for first-time server setup (installs systemd service)
• make install-client for first-time client setup (symlinks binary to /usr/local/bin)
• Binaries are built into ./bin/ relative to repo root
• Never run bare go build — always use the Makefile so version info is embedded
• Never manually edit version strings — they are injected at build time via ldflags