feat: 工资查询助手首版 v1.0.105

基于 skill-template 脚手架开发，包含：
- payroll_config（费率配置，可编辑）+ payslip_snapshots（解析历史，只读）2 张业务表
- 全国默认 + 北上广 4 套费率（社保/公积金/个税起征点/7 级税率表）
- 5 个业务 Action：calculate-payslip-simple / calculate-payslip-full / explain-term / view-config / edit-config
- 个税累计预扣法计算，支持多月历史累加
- 20 个薪资名词库（社保/公积金/个税/全勤/加班费等）
- 完整市场文档（README/TUTORIAL/DEMO/CHANGELOG）
- 296 测试全部通过

tests/test_platform_import.py

@@ -0,0 +1,136 @@
+# -*- coding: utf-8 -*-
+"""防回归：公共能力必须从共享 platform-kit 导入，而非技能 vendored 副本。"""
+from __future__ import annotations
+
+import importlib.metadata as metadata
+import os
+import re
+import sys
+import unittest
+
+from _support import get_scripts_dir, get_skill_root
+
+
+def _parse_platform_kit_min_version(skill_md_text: str) -> str:
+    parts = skill_md_text.split("---", 2)
+    if len(parts) < 2:
+        raise ValueError("missing frontmatter")
+    m = re.search(
+        r"platform_kit_min_version:\s*[\"']?([^\"'\s]+)[\"']?",
+        parts[1],
+    )
+    if not m:
+        raise ValueError("platform_kit_min_version not found")
+    return m.group(1).strip()
+
+
+def _requirement_dependency_lines(req_text: str) -> list[str]:
+    return [
+        line.strip()
+        for line in req_text.splitlines()
+        if line.strip() and not line.strip().startswith("#")
+    ]
+
+
+class TestPlatformImportSource(unittest.TestCase):
+    def test_jiangchang_skill_core_not_from_skill_scripts(self) -> None:
+        scripts_dir = os.path.abspath(get_scripts_dir())
+        skill_root = os.path.abspath(get_skill_root())
+        vendored = os.path.join(scripts_dir, "jiangchang_skill_core")
+
+        self.assertFalse(
+            os.path.isdir(vendored),
+            f"vendored package must not exist: {vendored}",
+        )
+
+        import jiangchang_skill_core
+        import jiangchang_skill_core.rpa.video_session as video_session
+
+        core_file = os.path.abspath(jiangchang_skill_core.__file__)
+        video_file = os.path.abspath(video_session.__file__)
+
+        self.assertNotIn(
+            scripts_dir.lower(),
+            core_file.lower(),
+            msg=f"jiangchang_skill_core loaded from skill scripts: {core_file}",
+        )
+        self.assertNotIn(
+            skill_root.lower(),
+            core_file.lower(),
+            msg=f"jiangchang_skill_core loaded from skill tree: {core_file}",
+        )
+        self.assertNotIn(
+            scripts_dir.lower(),
+            video_file.lower(),
+            msg=f"video_session loaded from skill scripts: {video_file}",
+        )
+
+        from jiangchang_skill_core.rpa.video_session import RpaVideoSession
+
+        self.assertTrue(callable(RpaVideoSession))
+
+    def test_skill_tree_load_issue_helper(self) -> None:
+        from jiangchang_skill_core import is_jiangchang_skill_core_from_skill_tree
+
+        skill_root = os.path.abspath(get_skill_root())
+        fake = os.path.join(skill_root, "scripts", "jiangchang_skill_core", "__init__.py")
+        self.assertTrue(
+            is_jiangchang_skill_core_from_skill_tree(skill_root=skill_root, core_file=fake)
+        )
+        self.assertFalse(
+            is_jiangchang_skill_core_from_skill_tree(
+                skill_root=skill_root, core_file=sys.executable
+            )
+        )
+
+    def test_platform_kit_min_version_is_at_least_declared(self) -> None:
+        from jiangchang_skill_core import version_ge
+        from util.constants import PLATFORM_KIT_MIN_VERSION
+
+        self.assertEqual(PLATFORM_KIT_MIN_VERSION, "1.2.11")
+
+        md_path = os.path.join(get_skill_root(), "SKILL.md")
+        with open(md_path, encoding="utf-8") as f:
+            md = f.read()
+        self.assertEqual(_parse_platform_kit_min_version(md), "1.2.11")
+
+        req_path = os.path.join(get_skill_root(), "requirements.txt")
+        with open(req_path, encoding="utf-8") as f:
+            req = f.read()
+        dep_lines = _requirement_dependency_lines(req)
+        dep_body = "\n".join(dep_lines).lower()
+        self.assertNotIn("jiangchang-platform-kit", dep_body)
+        self.assertNotIn("playwright", dep_body)
+
+        try:
+            installed = metadata.version("jiangchang-platform-kit")
+        except metadata.PackageNotFoundError:
+            self.skipTest("jiangchang-platform-kit not installed in current interpreter")
+        if not version_ge(installed, PLATFORM_KIT_MIN_VERSION):
+            self.skipTest(
+                f"installed jiangchang-platform-kit {installed!r} < required "
+                f"{PLATFORM_KIT_MIN_VERSION!r}; upgrade shared runtime to enforce this check"
+            )
+        self.assertTrue(
+            version_ge(installed, PLATFORM_KIT_MIN_VERSION),
+            msg=f"installed {installed!r} < required {PLATFORM_KIT_MIN_VERSION!r}",
+        )
+
+    def test_collect_runtime_diagnostics_importable(self) -> None:
+        from jiangchang_skill_core import collect_runtime_diagnostics
+
+        self.assertTrue(callable(collect_runtime_diagnostics))
+
+    def test_main_import_smoke(self) -> None:
+        scripts_dir = get_scripts_dir()
+        if scripts_dir not in sys.path:
+            sys.path.insert(0, scripts_dir)
+
+        from cli.app import build_parser
+
+        parser = build_parser()
+        self.assertIsNotNone(parser)
+
+
+if __name__ == "__main__":
+    unittest.main()