feat: add 7 missing commands (passenger transport + faction invites)

[rsned]

Summary

Syncs the client COMMANDS map with the 2026-06-07 OpenAPI spec, which added a passenger-transport system and faction-invite management. These 7 endpoints exist on the server but were missing from the client:

Command	Args	Purpose
faction_accept_invite	faction_id	Accept a pending invite (alias for join_faction)
faction_withdraw_invite	player_id	Withdraw an invite you sent
set_drone_name	drone_id, name	Set/clear a drone's display name (max 32 chars)
list_passengers	—	Passengers currently aboard your ship
list_station_passengers	[station]	Citizens waiting for transport at a station
load_passenger	destination	Load all waiting passengers bound for a destination
unload_passenger	name	Put a single passenger off at the current station

Caught by the api-sync test against the live OpenAPI spec.

Notes

• Arg schemas/required fields match the spec request bodies. Multi-word names (set_drone_name, unload_passenger) use the { rest } pattern, consistent with name_ship / upload_drone_script.
• Rebased onto current main (post-feat: add 19 missing commands, drop deprecated faction_set_ally #22), so this is a clean single-commit diff and the api-sync check is green.

Test plan

• bun run lint (biome) — clean
• bun build src/client.ts — OK
• bun test src/api-sync.test.ts — passes (client now fully in sync with the live spec)

🤖 Generated with Claude Code

[rsned]

ℹ️ Note on the failing api-sync check

The lint check passes. The api-sync check is expected to stay red until #22 merges — it is not caused by this PR's changes.

This branch is based on the current main, which:

• still contains the deprecated faction_set_ally (the sync test flags it as stale), and
• is still missing the 19 commands added in feat: add 19 missing commands, drop deprecated faction_set_ally #22 (flagged as missing).

Both are resolved by #22. Once #22 merges into main and this branch is rebased, the diff reduces to just the 7 new commands and the api-sync check goes green.

The formatting commit here (style: apply biome formatting) is the same fix #22 carries — main's client.ts predates the biome pass, so it's needed for the lint check to pass on a main-based branch.

[rsned]

Update: #22 has merged. Rebased onto current main as a clean single-commit diff — both CI checks are now green and the earlier note about the api-sync check being red no longer applies.