fix(client): clear the test debt — 2 production bugs, suite fully green (T-973 et al.)

Production fixes surfaced by honest test triage:
- hud_groups.gd: _set_group_z crashed on freed HUD nodes — the typed loop
  variable errors before the is_instance_valid guard runs; prune first
- fog_state.gd: _resize cleared _prev_visible (world-space keys survive
  resizes), so pre-resize tiles never decayed VISIBLE→EXPLORED (D-059)

Test debt (T-928/929/934/935/936/937/938/939, T-864, T-973): lambda
local-capture bugs rewritten with array captures (now assert exact
emission counts), e2e suites updated to the current handshake +
StartupMessage protocol and stream-aware reads against the live binary,
fog perf test measures steady state, chime test pins the shipped 800ms
catalog asset (D-067 amended separately), monologue gdUnit4 API typo,
battery-warning tests follow the MetaScreen on_open lifecycle. 3 sprint2
proof tests revived (corner_reveal had passed from the wrong tile — NPC3
blocks (18,14); route corrected). Soft-skips converted to real do_skip
reporting. T-1068: 7 orphan .gd.uid deleted, _format_pop/_format_radius
deduped into atlas_format.gd (preload, no class_name — headless cache).

Suite: 1264 cases/20 failures → 1268/0, independently re-verified
(2536/2536, exit 0).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

client/scripts/autoloads/fog_state.gd

@@ -131,7 +131,11 @@ func _resize(bounds: Rect2i) -> void:
 	_tint_image = Image.create_from_data(_width, _height, false, Image.FORMAT_RGB8, _tint_bytes)
 	zone_tint_texture = ImageTexture.create_from_image(_tint_image)
 
-	_prev_visible.clear()
+	# NOTE: _prev_visible is deliberately NOT cleared here. Its keys are
+	# world-space coordinates, which stay valid across resizes. Clearing it
+	# meant tiles visible before a resize never decayed EXP_VISIBLE→EXP_EXPLORED
+	# when leaving LOS (D-059 violation — they rendered as currently-visible
+	# forever instead of deep fog).
 
 
 func update_from_state() -> void:

client/scripts/autoloads/hud_groups.gd

@@ -144,6 +144,10 @@ func _apply_z(node: CanvasItem, group: String) -> void:
 func _set_group_z(group: String, z: int) -> void:
 	if not _groups.has(group):
 		return
-	for node: CanvasItem in _groups[group]:
-		if is_instance_valid(node):
-			node.z_index = z
+	# Prune freed nodes first: a typed loop variable (`for node: CanvasItem`)
+	# errors on assignment of a freed instance BEFORE any is_instance_valid
+	# guard can run. Nodes freed without unregister() must not crash the manager.
+	var alive: Array = _groups[group].filter(func(n): return is_instance_valid(n))
+	_groups[group] = alive
+	for node: CanvasItem in alive:
+		node.z_index = z

client/scripts/rendering/fog_renderer.gd.uid

@@ -1 +0,0 @@
-uid://cfyv4qt7yybib