Add team standings snapshot scene

[deevus]

What to build

Add a deterministic named snapshot scene for the real TeamStandings() screen, reusing or extending the championship fixture data so team standings are rendered through the real game path.

Acceptance criteria

• A team standings snapshot scene drives the real TeamStandings() rendering path.
• Fixture team points/kills/wins produce a meaningful, stable standings table.
• Baseline PNG and snapshot README entry are added, and zig build test-snapshots passes.

Blocked by

• Add championship standings snapshot scene #168

[deevus]

This was generated by AI during triage.

Agent Brief

Category: enhancement
Summary: Add deterministic snapshot coverage for the real TeamStandings() screen.

Current behavior:
The snapshot suite does not yet cover team standings. The game can render TeamStandings() after championship standings when the team/competitor conditions are active, but no named scene currently sets up stable team standings data and captures it.

Desired behavior:
After championship standings fixture work is available, a named team-standings scene should reuse or extend that deterministic state to invoke TeamStandings() through the real rendering path and capture a stable baseline.

Key interfaces:

• --snapshot-scene named scene selection — should recognize the team standings scene.
• TeamStandings() — should remain the source of rendered pixels.
• Team/championship fixture state — team points, kills, wins/fastest-lap indicators, team ordering, driver/car assignments, competitor count, and any mode flags controlling team standings visibility must be deterministic.

Acceptance criteria:

• A clearly named snapshot scene drives the real TeamStandings() rendering path.
• Fixture data produces a representative, stable team standings table.
• The implementation reuses or extends the championship fixture setup where practical instead of duplicating unrelated state setup.
• A baseline PNG is checked in and the snapshot README documents the scene.
• zig build test-snapshots passes on the canonical snapshot host.

Dependency note:
Do not start this before the championship standings fixture/scene work from #168 has landed, unless the maintainer explicitly chooses to combine the two slices.

Out of scope:

• Changing team scoring behavior.
• Redesigning the standings presentation.
• Implementing championship standings coverage itself; that is tracked in Add championship standings snapshot scene #168.