chore(*): Remove completed items from to do list

TODO.md

@@ -6,9 +6,7 @@ Deferred work, in rough priority order. The current architecture (ShipAction/Shi
 
 The training pipeline is built — see `TRAINING.md` (self-play PPO via the vendored godot_rl_agents bridge, JSON policy export, in-game GDScript inference, eval ladder). Remaining:
 
-- [x] Promote generation 4's stage-3 gauntlet policy as the new `Game/bots/promoted/easy.json` baseline.
 - [ ] Run the generation-5 handling/intercepts/league/teamplay curriculum described in `TRAINING.md`; promote later checkpoints as `medium`/`hard` only after they clear the match and behaviour gates.
-- [x] Frozen-opponent league plumbing: `--opponent-mode=league` samples a past exported checkpoint per episode; generation 5 Stage 6 supplies the curated pool.
 - [ ] Extend generation 5's moving aerial-intercept states with wall plays and rebound scenarios after Stage 5 establishes a productive-air-touch baseline.
 - [ ] Design team-credit rewards and paired 2v2 evaluation before enabling the deferred teamplay stage.
 
@@ -17,15 +15,7 @@ The training pipeline is built — see `TRAINING.md` (self-play PPO via the vend
 The largest gap between this and a AAA-feeling product is presentation, not code. Sequenced after the above for pragmatic reasons, but this is the highest impact per hour.
 
 - [ ] **Audio — there is none.** Zero sound files, zero `AudioStreamPlayer` nodes, no bus layout. Needs: engine hum pitched to throttle, turbo whoosh, ball impacts scaled by collision impulse, wall scrapes, goal explosion, crowd bed, UI clicks, countdown beeps, music. Can be driven off `Ship`'s existing telemetry signals.
-- [x] SSAO/SSIL in the arena Environments — cheapest single perceived-quality win available; grounds the ships against the deck and gives the fillets and goal recesses real depth.
-- [x] VFX on anything that moves: throttle-reactive engine cores and simple rear flames, a speed-scaled ball trail and team-tinted goal bursts.
-- [x] Impact feedback — intensity-scaled screen shake, unscaled hit-stop and controller rumble on ball contact.
-- [x] Camera feel in `ship_camera.gd` — speed-based FOV widening, turbo kick-back and decaying impact shake.
-- [x] Goal celebration sequence: goal burst, team-tinted flash/title card, dedicated camera cut and slow-motion beat after authoritative score registration and before reset/kickoff.
-- [x] Local lighting / dynamic GI — four local pitch lights plus SDFGI provide bounce and contact lighting for the runtime-generated arena shell; the shader's `hull_fill` stand-in is retired. (The shell is generated in `_ready`, so it cannot participate in an editor LightmapGI bake.)
-- [x] Dress `arena_03` — its asteroid field now has mining stations, debris clusters and a distant planet.
 - [ ] Custom font + a real `Theme` resource for the HUD. `ThemeDB.fallback_font` at 10-13 px reads as a debug overlay.
-- [x] Post-processing beyond glow: a cinematic vignette and turbo-driven chromatic aberration. DoF and motion blur were intentionally omitted after playtesting.
 
 ## Multiplayer (long term)