优化 Runtime 安装进度体验

- 状态栏与窗口强制刷新，进度更新无需移动鼠标即可实时显示
- 安装过程拆分为 12 个阶段，每段进度从 0 到 100%
- 安装阶段解析 uv 下载事件推进进度，模型下载阶段实时反映字节进度

tests/test_bootstrap_runtime.py

@@ -1,4 +1,5 @@
 import importlib.util
+import json
 import tempfile
 import unittest
 from pathlib import Path
@@ -35,10 +36,16 @@ class BootstrapRuntimeTest(unittest.TestCase):
                 ben2_commit="test-ben2-commit",
                 status=str(root / "status.json"),
             )
-            with patch.object(bootstrap, "run") as mocked_run:
+            with patch.object(bootstrap, "run") as mocked_run, patch.object(
+                bootstrap,
+                "run_install",
+            ) as mocked_run_install:
                 bootstrap.install(args)
 
         commands = [call.args[0] for call in mocked_run.call_args_list]
+        commands += [
+            call.args[4] for call in mocked_run_install.call_args_list
+        ]
         da3_command = next(
             command
             for command in commands
@@ -50,15 +57,15 @@ class BootstrapRuntimeTest(unittest.TestCase):
         )
         gsplat_call = next(
             call
-            for call in mocked_run.call_args_list
-            if any("gsplat @" in str(value) for value in call.args[0])
+            for call in mocked_run_install.call_args_list
+            if any("gsplat @" in str(value) for value in call.args[4])
         )
-        gsplat_command = gsplat_call.args[0]
+        gsplat_command = gsplat_call.args[4]
         self.assertIn("--no-build-isolation", gsplat_command)
         self.assertTrue(
             any(bootstrap.GSPLAT_COMMIT in str(value) for value in gsplat_command)
         )
-        self.assertEqual(gsplat_call.args[1], {"BUILD_NO_CUDA": "1"})
+        self.assertEqual(gsplat_call.args[5], {"BUILD_NO_CUDA": "1"})
 
         ben2_command = next(
             command
@@ -106,10 +113,81 @@ class BootstrapRuntimeTest(unittest.TestCase):
             for command in default_downloads
             if "PramaLLC/BEN2" in command
         )
-        self.assertEqual(
-            ben2_download[-1],
-            '["config.json", "model.safetensors"]',
+        patterns = [
+            ben2_download[index + 1]
+            for index, value in enumerate(ben2_download)
+            if value == "--allow-pattern"
+        ]
+        self.assertEqual(patterns, ["config.json", "model.safetensors"])
+        self.assertIn("--stage", ben2_download)
+        self.assertIn("--stage-label", ben2_download)
+        self.assertEqual(ben2_download[-1], "Download BEN2 Base")
+
+    def test_run_stage_writes_stage_progress(self):
+        bootstrap = load_bootstrap_runtime()
+        with tempfile.TemporaryDirectory() as directory:
+            status_path = Path(directory) / "status.json"
+            with patch.object(bootstrap, "run") as mocked_run:
+                bootstrap.run_stage(
+                    str(status_path),
+                    3,
+                    12,
+                    "Install PyTorch",
+                    ["uv", "pip", "install", "torch"],
+                    None,
+                    "plain",
+                )
+
+            self.assertEqual(
+                mocked_run.call_args.args[0],
+                ["uv", "pip", "install", "torch"],
+            )
+            status = json.loads(status_path.read_text(encoding="utf-8"))
+            self.assertEqual(status["progress"], 1.0)
+            self.assertEqual(status["stage"], 3)
+            self.assertEqual(status["stages"], 12)
+            self.assertEqual(status["stage_label"], "Install PyTorch")
+
+    def test_run_install_tracks_package_download_events(self):
+        bootstrap = load_bootstrap_runtime()
+
+        class FakeProcess:
+            def __init__(self, lines):
+                self.stdout = lines
+
+            def wait(self):
+                return 0
+
+        fake_process = FakeProcess(
+            [
+                "Resolved 3 packages in 1.0s",
+                "Downloading torch (10MiB)",
+                " Downloaded torch",
+                "Prepared 3 packages in 2.0s",
+                "Installed 3 packages in 0.5s",
+            ]
         )
+        with tempfile.TemporaryDirectory() as directory:
+            status_path = Path(directory) / "status.json"
+            with patch.object(
+                bootstrap.subprocess,
+                "Popen",
+                return_value=fake_process,
+            ):
+                bootstrap.run_install(
+                    str(status_path),
+                    2,
+                    12,
+                    "Install PyTorch",
+                    ["uv", "pip", "install", "torch"],
+                )
+
+            status = json.loads(status_path.read_text(encoding="utf-8"))
+            self.assertEqual(status["progress"], 0.95)
+            self.assertEqual(status["message"], "Installing packages")
+            self.assertEqual(status["stage"], 2)
+            self.assertEqual(status["stages"], 12)
+            self.assertEqual(status["stage_label"], "Install PyTorch")
 
 
 if __name__ == "__main__":