Extract a Session interface from *discordgo.Session so DiscordBot methods
can be tested with a mock — no live Discord connection required. Add
AddHandler, RegisterCommands, and UserID methods to DiscordBot so
external callers (main.go, sys_channel_server.go) no longer reach
through bot.Session directly. Rewrite tests with a mockSession,
raising discordbot coverage from 12.5% to 66.7%.
The config package used `package _config` with a leading underscore,
which is unconventional in Go. Rename to `package config` (matching the
directory name) and use `cfg` as the standard import alias across all
93 importing files.
Add package-level documentation (doc.go) to all 22 first-party
packages and godoc comments to ~150 previously undocumented
exported symbols across common/, network/, and server/.
Re-enable the golangci-lint job in CI (disabled Oct 2025), update to
Go 1.25 and golangci-lint-action v7. Fix errcheck, gosimple S1009,
staticcheck SA4031 and SA2001 errors across 54 files. Remaining ~39
lint errors will be addressed in follow-up commits.
