Add countdown timer to API post delay for ping operations

[Copilot]

The API post status message was static text with no indication of remaining time. Both manual and auto ping modes now display a countdown during the 7-second MeshMapper API delay.

Changes

Status Display

• Changed message from "Waiting for API post" to "Wait to post API (Xs)" where X counts down 7→1
• Shows "Posting to API..." when countdown completes

Implementation

• Added updateApiCountdownStatus() - calculates and displays remaining time
• Added startApiCountdown(delayMs) - initializes countdown with 1s update interval
• Added stopApiCountdown() - cleanup to prevent memory leaks
• Modified sendPing() to trigger countdown after STATUS_UPDATE_DELAY_MS
• Added countdown cleanup in disconnect handler

State Management

• apiCountdownTimer - stores interval ID
• apiPostTime - target timestamp for API post

Pattern

Follows existing auto-ping countdown implementation:

function startApiCountdown(delayMs) {
  stopApiCountdown();
  state.apiPostTime = Date.now() + delayMs;
  updateApiCountdownStatus();
  state.apiCountdownTimer = setInterval(() => {
    updateApiCountdownStatus();
  }, 1000);
}

Applies to both manual "Send Ping" and "Auto Ping" modes.

Original prompt

The last merge fixed all the issues I had.

Id like to make a change to both ping and auto ping now.

I want to rework "Waiting for API post" to Wait to post API" and provide a count down for that as well. Whatever its set to, currently its 7s to countdown to 0s

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.