Building Private Signal Board: a Full-Stack Midnight dApp with Compact, Witnesses, React, and Off-Chain Metadata Repository: https://github.com/marmar9615-cloud/midnight-private-signal Bounty issue: https://github.com/midnightntwrk/contributor-hub/issues/314 1. Opening Angle Most demo applications on a new smart contract platform show the same happy path: deploy a contract, write some state, read it back, and call it done. That is useful for learning syntax, but it misses the part that makes Midnight interesting. Midnight is built for applications where developers need to choose what becomes public, what remains private, and what can be proven without being fully revealed. For this tutorial I built a small application called Private Signal Board. The concept is intentionally practical: imagine a team wants a public board of approved signals, announcements, or incident reports, but it does not want the full private input path to become public application state.…