Create Shared JavaScript Config Module (config.js)

[w2naf]

Description

Create a central config.js module that holds shared configuration values used across the frontend JavaScript files (band colors, receiver info, API endpoints, timing constants, etc.).

Motivation

Currently, configuration values like bandColorMap are defined in multiple places (duplicated in map_ft.js). A single config module eliminates duplication and makes the system easier to configure.

Acceptance Criteria

• config.js created with shared constants (band colors, API URLs, timing, receiver info)
• map_ft.js and table_ft.js import from config.js instead of defining their own copies
• Duplicate bandColorMap definitions consolidated
• Dashboard functions correctly with the new module

Depends On

• Receiver config extraction (KD3BVX) — receiver callsign/grid values feed into config.js

Milestone

Milestone 1: Minimal Working System (Feb 28)