Merge remote-tracking branch 'origin/main' into header-ghost-fix

client/tests/test_fog_shader.gd

@@ -193,20 +193,24 @@ func test_visibility_texture_update_performance() -> void:
 	fog_state.update_from_state()
 
 	# Measure the steady-state per-frame update (same positions, no resize).
-	# Median of 5 runs: a single wall-clock sample flakes when the machine is
-	# loaded (T-1092 — the pre-push gate shares the box with live sessions);
-	# the median keeps the D-059 budget intent while absorbing load spikes.
+	# MINIMUM of 7 runs (T-1210, superseding T-1092's median-of-5): the
+	# assertion asks whether the CODE meets the D-059 budget, and wall-clock
+	# load can only inflate a sample, never deflate it — so the minimum is
+	# the least-noise estimator of code capability, while a real regression
+	# shifts the minimum too. Median-of-5 still flaked three times on
+	# 2026-07-26 when a cargo build saturated every core and inflated all
+	# five samples together (0.549/0.503/0.638 vs the 0.5 budget).
 	var samples: Array[float] = []
-	for _i in range(5):
+	for _i in range(7):
 		var start := Time.get_ticks_usec()
 		fog_state.update_from_state()
 		samples.append((Time.get_ticks_usec() - start) / 1000.0)
 	samples.sort()
-	var median_ms: float = samples[2]
+	var best_ms: float = samples[0]
 
 	# D-059: Visibility texture upload budget: 0.1ms
 	# Allow margin for test environment overhead
-	assert_that(median_ms).is_less(0.5)
+	assert_that(best_ms).is_less(0.5)
 
 	GameState.visible_positions.clear()