tools/chat: rename tools to ask_user_line, ask_user_choice, ask_user_form

Model-facing names via @tool(name=…); Python symbols unchanged.

tests/test_tools/test_chat_tools.py

@@ -12,7 +12,7 @@ async def test_ask_user_tool() -> None:
     backend = ScriptedBackend(["42"])
     with temporary_backend(backend):
         registry = ToolRegistry([ask_user])
-        out = await registry.execute("ask_user", '{"question": "Answer?"}')
+        out = await registry.execute("ask_user_line", '{"question": "Answer?"}')
     assert out == "42"
 
 
@@ -21,7 +21,7 @@ async def test_choose_user_tool_index() -> None:
     with temporary_backend(backend):
         registry = ToolRegistry([choose_user])
         out = await registry.execute(
-            "choose_user",
+            "ask_user_choice",
             json.dumps(
                 {
                     "question": "Pick",
@@ -36,7 +36,7 @@ async def test_choose_user_tool_index() -> None:
 async def test_choose_user_bad_options() -> None:
     registry = ToolRegistry([choose_user])
     out = await registry.execute(
-        "choose_user",
+        "ask_user_choice",
         json.dumps({"question": "Pick", "options": "not-json"}),
     )
     assert out.startswith("error:")
@@ -48,7 +48,7 @@ async def test_form_user_tool() -> None:
     with temporary_backend(backend):
         registry = ToolRegistry([form_user])
         out = await registry.execute(
-            "form_user",
+            "ask_user_form",
             json.dumps({"title": "Setup", "fields": fields, "confirm_submit": True}),
         )
     assert json.loads(out) == {"user": "ncbm"}
@@ -56,11 +56,11 @@ async def test_form_user_tool() -> None:
 
 async def test_chat_tools_in_default_list() -> None:
     names = {t.name for t in CHAT_TOOLS}
-    assert names == {"ask_user", "choose_user", "form_user"}
+    assert names == {"ask_user_line", "ask_user_choice", "ask_user_form"}
 
 
 async def test_ask_user_non_interactive_error() -> None:
     with temporary_backend(NonInteractiveBackend()):
         registry = ToolRegistry([ask_user])
-        out = await registry.execute("ask_user", '{"question": "hi"}')
+        out = await registry.execute("ask_user_line", '{"question": "hi"}')
     assert out.startswith("error:")