feat(navigator): show the build server destination to the team

[TheMeinerLP]

Summary

• New fixed navigator destination Build (slot 7, Material.SCAFFOLDING) that sends the player to the CloudNet task Build. This is separate from MemberBuild, which sits behind Creative.
• It is visible only with the permission titan.navigator.buildserver, checked through PermissionService. ALLOWED shows it; NOT_SET and DENIED hide it.
• In the local variant (no permission platform) nobody sees it.

How

• Two shared Aves inventories: the public one (unchanged) and a team one (public destinations plus Build). Each is registered once in the module lifecycle and unregistered on shutdown.
• Each inventory is wrapped in a SharedNavigator with its own layout state and lock.
• On open, the permission decides which inventory the player gets.
• A click on Build re-checks the permission. If it was revoked, nothing is delivered and the inventory closes.
• The navigator column now requires PermissionService.

Why this shape

This supersedes #219. That PR listed each running build server through CloudNet service discovery in the :bridge extension, and it depended on FeatureGate/FeatureAudience from #216, which never reached main. One fixed destination keeps destinations in code, as the navigator spec requires. CloudNet's task routing already sends players only to running servers.

Tests

• NavigatorBuildDestinationTest (10 tests)
• AvesSharedInventoriesTest
• NavigatorDestinationTest
• NavigatorModuleLeakTest (both inventories, alternating permissions)
• Existing navigator tests
• ./gradlew build is green.

Known gap: "no chat message" on a revoked click is not asserted, because the fixture cannot capture chat. The code sends none.

Operations

• Create the CloudNet task Build if it is missing.
• Grant titan.navigator.buildserver to the team group in LuckPerms.

OpenSpec

openspec/changes/navigator-build-destination

https://claude.ai/code/session_01A7aAe2E6wAEbi6jjnyPTWH

[github-actions]

Test results

  261 files    261 suites   16m 48s ⏱️
  440 tests   439 ✅ 1 💤 0 ❌
1 320 runs  1 317 ✅ 3 💤 0 ❌

Results for commit 7ea6937.