* fix: exclude disabled MCP servers from count
Fixes#3 - MCP count was showing all servers regardless of
enabled/disabled state.
## Root Cause
The HUD was counting all MCP server keys from config files without
checking if they were in the disabled lists:
- `disabledMcpServers` in `~/.claude.json` (user-scope)
- `disabledMcpjsonServers` in `settings.local.json` (project .mcp.json)
## Changes
- Add `getDisabledMcpServers()` function to read disabled arrays
- Add `DisabledMcpKey` union type for compile-time safety
- Filter disabled servers when counting MCPs
- Add debug logging (enable via `DEBUG=claude-hud`)
- Add 8 new tests including Issue #3 regression test
## Test Coverage
- User-scope disabled filtering
- Project .mcp.json disabled filtering
- All MCPs disabled → 0
- Non-string values in disabled arrays (ignored)
- Cross-scope duplicate counting behavior
- Case-sensitive server name matching
- Issue #3 exact scenario (6 MCPs, disable progressively)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* refactor: extract debug logging into shared helper module
Per PR feedback, consolidate duplicate debug logging code from
config-reader.ts and usage-api.ts into a shared debug.ts helper.
- Add src/debug.ts with createDebug() factory function
- Update config-reader.ts to use createDebug('config')
- Update usage-api.ts to use createDebug('usage')
- Same functionality, better DRY compliance
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---------
Co-authored-by: melon-hub <melon-hub@users.noreply.github.com>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
