feat: correct default IPs as constants

[ConnorNeed]

Avoid having random ips all over the place making it more readable and easier to update.

Gives us better defaults in a few places as well

[Copilot]

Pull request overview

This PR centralizes several previously hard-coded IP addresses into a single src/constants.ts module and updates UI components (and a route handler) to use these shared constants, reducing scattered “magic IPs” across the codebase.

Changes:

• Added src/constants.ts to define shared IP/host defaults (e.g., rover/base AP/base host, tiling server).
• Updated multiple UI components to use the new constants instead of inline IP strings or runtime env values.
• Simplified start.sh by removing local IP detection and no longer injecting NEXT_PUBLIC_TILE_SERVER into the web UI container.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
start.sh	Removes local IP probing and stops passing tile-server address via env var to the web container.
src/constants.ts	Introduces centralized constants for rover/base/AP IPs and tiling server host:port.
src/components/panels/MosaicDashboard.tsx	Replaces hard-coded WebRTC signaling IP with ROVER_IP.
src/components/panels/MapView.tsx	Switches offline tile URL to use TILING_SERVER constant.
src/components/ContainerList.tsx	Sets default launch server base URL using ROVER_IP.
src/components/ContainerCard.tsx	Removes env-derived API base logic (but leaves an unused import).
src/components/ConnectionStatusDisplay.tsx	Updates default ROS bridge URL to use ROVER_IP.
src/app/dashboard/api/route.ts	Replaces hard-coded ping host list with constants.

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