refactor(typing): Use namespace import for typing_extensions

why: CLAUDE.md requires namespace imports for typing modules.
what:
- Change `from typing_extensions import X` to `import typing_extensions`
- Update all usages to use `typing_extensions.X` namespace

Author: tony

src/vcspull/cli/_output.py

@@ -8,7 +8,7 @@
 from dataclasses import dataclass, field
 from enum import Enum
 
-from typing_extensions import NotRequired
+import typing_extensions
 
 JsonPrimitive: t.TypeAlias = str | int | float | bool | None
 JsonValue: t.TypeAlias = JsonPrimitive | dict[str, "JsonValue"] | list["JsonValue"]
@@ -25,17 +25,17 @@ class PlanEntryPayload(t.TypedDict):
     path: str
     workspace_root: str
     action: str
-    detail: NotRequired[str]
-    url: NotRequired[str]
-    branch: NotRequired[str]
-    remote_branch: NotRequired[str]
-    current_rev: NotRequired[str]
-    target_rev: NotRequired[str]
-    ahead: NotRequired[int]
-    behind: NotRequired[int]
-    dirty: NotRequired[bool]
-    error: NotRequired[str]
-    diagnostics: NotRequired[list[str]]
+    detail: typing_extensions.NotRequired[str]
+    url: typing_extensions.NotRequired[str]
+    branch: typing_extensions.NotRequired[str]
+    remote_branch: typing_extensions.NotRequired[str]
+    current_rev: typing_extensions.NotRequired[str]
+    target_rev: typing_extensions.NotRequired[str]
+    ahead: typing_extensions.NotRequired[int]
+    behind: typing_extensions.NotRequired[int]
+    dirty: typing_extensions.NotRequired[bool]
+    error: typing_extensions.NotRequired[str]
+    diagnostics: typing_extensions.NotRequired[list[str]]
 
 
 class PlanSummaryPayload(t.TypedDict):
@@ -49,7 +49,7 @@ class PlanSummaryPayload(t.TypedDict):
     blocked: int
     errors: int
     total: int
-    duration_ms: NotRequired[int]
+    duration_ms: typing_extensions.NotRequired[int]
 
 
 class PlanWorkspacePayload(t.TypedDict):

src/vcspull/types.py

@@ -33,7 +33,7 @@
 import typing as t
 from typing import TypeAlias
 
-from typing_extensions import NotRequired, TypedDict
+import typing_extensions
 
 if t.TYPE_CHECKING:
     from libvcs._internal.types import VCSLiteral
@@ -50,16 +50,16 @@
 RawConfig: TypeAlias = RawConfigDict
 
 
-class ConfigDict(TypedDict):
+class ConfigDict(typing_extensions.TypedDict):
     """Configuration map for vcspull after shorthands and variables resolved."""
 
     vcs: VCSLiteral | None
     name: str
     path: pathlib.Path
     url: str
     workspace_root: str
-    remotes: NotRequired[GitSyncRemoteDict | None]
-    shell_command_after: NotRequired[list[str] | None]
+    remotes: typing_extensions.NotRequired[GitSyncRemoteDict | None]
+    shell_command_after: typing_extensions.NotRequired[list[str] | None]
 
 
 ConfigDir = dict[str, ConfigDict]

tests/helpers.py

@@ -5,7 +5,7 @@
 import os
 import typing as t
 
-from typing_extensions import Self
+import typing_extensions
 
 from vcspull._internal.config_reader import ConfigReader
 
@@ -40,7 +40,7 @@ def unset(self, envvar: str) -> None:
             self._reset[envvar] = self._environ[envvar]
             del self._environ[envvar]
 
-    def __enter__(self) -> Self:
+    def __enter__(self) -> typing_extensions.Self:
         """Context manager entry for setting and resetting environmental variable."""
         return self