chore(meta): update changelog

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -7,6 +7,8 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 ## [Unreleased]
 
 ### Added
+- Visual test harness — `make screenshot`, `make test-visual`, `make visual-update` for automated visual regression testing with golden PNGs across 11 scenarios (fog, HUD, dialogue, minimap)
+- Visual movie mode — `make visual-movie` captures interaction flows as frame sequences with contact sheet generation
 - World seed protocol — StartupMessage carries world_seed from client to server after handshake, enabling deterministic NPC population seeding (D-010, D-029)
 - EntanglementConfig — per-seed NPC population ratios (flat/mundane/intrigue) sampled from seeded RNG with D-029 bounds, ensuring same seed = same world (#175, #178)
 - Fog debug mode — toggle FogState.debug_exploration to render raw exploration texture as colored overlay for diagnostic use
@@ -15,6 +17,7 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 - Sprint 22 "Wire" briefings (server, client, visual, CI, planning, joint)
 
 ### Fixed
+- Fog shader: silent compilation failure in OpenGL3 compat mode — removed `return` statements from fragment() which are not supported, causing fog overlay to render as no-op (root cause of Sprint 22 fog regression)
 - Fog system: blocky stair-stepped edges at vision cone boundary — doubled Gaussian blur step size for D-066 compliant 6-8 tile smooth gradient (#569)
 - Fog system: zero visibility in explored areas — switched bounds calculation from visible_tiles (empty in live server mode) to visible_positions, and removed shader guard that cut off gradient bleed into unexplored tiles (#569)
 - Fog shader alpha tuned to D-059 spec: light fog 0.25-0.35 (was 0.25-0.55), deep fog 0.55-0.70 (was 0.78-0.90) — world content now visible through fog instead of hidden behind it (#563)