feat(迭代26 T2): 全局纹理过滤设邻近采样+平滑渐变件 LINEAR 白名单

- project.godot [rendering] 增 textures/canvas_textures/default_texture_filter=0（Nearest——
  翻转面=立绘/瓦片/格面/图标/九宫格 UI 皮 crisp，即本批意图；T0 枚举闭合无漏枚举面）
- ui_kit.gd 白名单三件显式 LINEAR：vignette_rect 暗角/beams_rect 光柱（Q7 裁，连续 alpha 同血统）/
  gradient_base 地图渐变；既有脚影/状态图标 LINEAR 不动
- 冒烟新增 _smoke_texture_filter() 6 断言（V3：工程设置=0+白名单三件在位+既有两处不丢）；
  冒烟 1022→1028/0；probe --click 全绿残留 0

game/presentation/views/ui_kit.gd

@@ -253,6 +253,7 @@ static func vignette_rect() -> TextureRect:
 	var tr := TextureRect.new()
 	tr.texture = t
 	tr.stretch_mode = TextureRect.STRETCH_SCALE
+	tr.texture_filter = CanvasItem.TEXTURE_FILTER_LINEAR   # 平滑渐变件白名单（迭代 26 T2——全局 Nearest 下显式豁免）
 	tr.set_anchors_preset(Control.PRESET_FULL_RECT)
 	tr.mouse_filter = Control.MOUSE_FILTER_IGNORE
 	return tr
@@ -272,6 +273,7 @@ static func beams_rect() -> TextureRect:
 	var tr := TextureRect.new()
 	tr.texture = ImageTexture.create_from_image(img)
 	tr.stretch_mode = TextureRect.STRETCH_TILE
+	tr.texture_filter = CanvasItem.TEXTURE_FILTER_LINEAR   # 平滑渐变件白名单（迭代 26 T2 Q7 裁——连续 alpha 与暗角/地图渐变同血统）
 	tr.set_anchors_preset(Control.PRESET_FULL_RECT)
 	tr.mouse_filter = Control.MOUSE_FILTER_IGNORE
 	return tr
@@ -291,6 +293,7 @@ static func gradient_base(top: Color, low: Color, stop := 0.4) -> TextureRect:
 	var tr := TextureRect.new()
 	tr.texture = t
 	tr.stretch_mode = TextureRect.STRETCH_SCALE
+	tr.texture_filter = CanvasItem.TEXTURE_FILTER_LINEAR   # 平滑渐变件白名单（迭代 26 T2——全局 Nearest 下显式豁免）
 	tr.set_anchors_preset(Control.PRESET_FULL_RECT)
 	tr.mouse_filter = Control.MOUSE_FILTER_IGNORE
 	return tr

game/project.godot

@@ -34,3 +34,4 @@ theme/custom="res://assets/theme/main_theme.tres"
 
 renderer/rendering_method="gl_compatibility"
 renderer/rendering_method.mobile="gl_compatibility"
+textures/canvas_textures/default_texture_filter=0

game/smoke/smoke_all.gd

@@ -108,6 +108,7 @@ func _run_core_smoke(db, rng) -> void:
 	_smoke_battle_log_view()
 	_smoke_global_theme()
 	_smoke_button_five_states()
+	_smoke_texture_filter()
 	_smoke_encounter_roll()
 	_smoke_attack_chain_fresh_pool()
 	_smoke_clear_reward_chain()
@@ -5531,6 +5532,30 @@ func _smoke_button_five_states() -> void:
 		check(focus_hits == "", "V2 红线维持 focus 族词条零定义%s" % ("" if focus_hits == "" else "（违例：" + focus_hits + "）"))
 
 
+# ---- 全局纹理过滤冒烟（迭代 26 T2——工程设置 Nearest＋平滑渐变件 LINEAR 白名单；V3）----
+func _smoke_texture_filter() -> void:
+	print("--- UI 全局纹理过滤（Nearest+白名单三件）---")
+	var v = ProjectSettings.get_setting("rendering/textures/canvas_textures/default_texture_filter")
+	check(v != null and int(v) == 0, "V3 工程设置 default_texture_filter=0（Nearest，翻转面=立绘/瓦片/九宫格 crisp）")
+	var uikit_s = load("res://presentation/views/ui_kit.gd")
+	var vg = uikit_s.vignette_rect()
+	check(vg.texture_filter == CanvasItem.TEXTURE_FILTER_LINEAR, "V3 白名单在位：暗角 vignette 显式 LINEAR")
+	vg.free()
+	var bm = uikit_s.beams_rect()
+	check(bm.texture_filter == CanvasItem.TEXTURE_FILTER_LINEAR, "V3 白名单在位：光柱 beams 显式 LINEAR")
+	bm.free()
+	var gb = uikit_s.gradient_base(Color.BLACK, Color.WHITE)
+	check(gb.texture_filter == CanvasItem.TEXTURE_FILTER_LINEAR, "V3 白名单在位：地图渐变 gradient_base 显式 LINEAR")
+	gb.free()
+	# 既有显式 LINEAR 两处不丢（源码锚定——脚影/状态图标）
+	var bw_src: String = FileAccess.get_file_as_string("res://presentation/views/board_world.gd")
+	check(bw_src.contains("shadow.texture_filter = CanvasItem.TEXTURE_FILTER_LINEAR"),
+		"V3 脚影显式 LINEAR 不丢（board_world.gd）")
+	var ss_src: String = FileAccess.get_file_as_string("res://presentation/views/status_slot_row.gd")
+	check(ss_src.contains("icon.texture_filter = CanvasItem.TEXTURE_FILTER_LINEAR"),
+		"V3 状态图标显式 LINEAR 不丢（status_slot_row.gd）")
+
+
 # ---- 存档序列化冒烟（SaveManager——读写往返/新档合法/余额拒花/锻造出域拒/高版本拒读禁写/
 # 损坏兜底/迁移链/域界干净/摘要 cap/摘要集成/生涯终身计数域 v6）。测试文件统一 user://smoke_save_*.json 隔离，
 # 段首清场+段尾清理——绝不碰 user://save.json（红线）。