chore(contextual): purge residual floating WsFrame defs + output_formatter branch

After M6.5 deletion of run_floating_stream and the frame dispatch,
WsFrameType.floating_request/floating_domain, WsFloatingRequest,
WsFloatingDomain, WsFloatingScope, WsDomain, and the StreamFormatter's
floating_domain branch were left as dead protocol surface. Remove them,
along with the corresponding test cases in test_schemas_v3.py and
test_output_formatter.py.

tests/test_output_formatter.py

@@ -5,7 +5,7 @@ from __future__ import annotations
 import pytest
 
 from app.core.output_formatter import StreamFormatter
-from app.schemas import WsFloatingDomain, WsStreamEnd, WsStreamStart, WsStreamText
+from app.schemas import WsStreamEnd, WsStreamStart, WsStreamText
 
 
 async def _stream(*events: tuple[str, object]):
@@ -36,29 +36,6 @@ async def test_stream_formatter_text_stream() -> None:
     assert isinstance(frames[-1], WsStreamEnd)
 
 
-@pytest.mark.asyncio
-async def test_stream_formatter_floating_domain_first() -> None:
-    formatter = StreamFormatter(request_id="req-2")
-    frames = await _collect(
-        formatter,
-        _stream(
-            (
-                "floating_domain",
-                {"type": "node", "id": "n-1", "section": None},
-            ),
-            ("token", "Summary"),
-        ),
-    )
-
-    assert isinstance(frames[0], WsFloatingDomain)
-    assert frames[0].domain.type == "node"
-    assert frames[0].domain.id == "n-1"
-    assert isinstance(frames[1], WsStreamStart)
-    assert isinstance(frames[2], WsStreamText)
-    assert frames[2].chunk == "Summary"
-    assert isinstance(frames[-1], WsStreamEnd)
-
-
 @pytest.mark.asyncio
 async def test_stream_formatter_ignores_unknown_events() -> None:
     formatter = StreamFormatter(request_id="req-3")

tests/test_schemas_v3.py

@@ -4,12 +4,8 @@ import pytest
 from pydantic import ValidationError
 
 from app.schemas import (
-    WsDomain,
     WsFrameType,
     WsHomeRequest,
-    WsFloatingDomain,
-    WsFloatingRequest,
-    WsFloatingScope,
     WsStreamEnd,
     WsStreamStart,
     WsStreamText,
@@ -22,11 +18,9 @@ from app.schemas import (
 def test_v3_frame_types_exist():
     v3_types = [
         "home_request",
-        "floating_request",
         "stream_start",
         "stream_text",
         "stream_end",
-        "floating_domain",
         "data_request",
         "data_response",
         "mutation",
@@ -86,51 +80,6 @@ def test_home_request_requires_message():
         WsHomeRequest.model_validate({"type": "home_request"})
 
 
-# ── WsFloatingRequest ────────────────────────────────────────────────────
-
-
-def test_floating_request_basic():
-    frame = WsFloatingRequest(
-        message="Summarise",
-        scope=WsFloatingScope(type="task", id="task-123"),
-    )
-    assert frame.type == WsFrameType.floating_request
-    assert frame.scope.type == "task"
-    assert frame.scope.id == "task-123"
-
-
-def test_floating_request_scope_without_id():
-    frame = WsFloatingRequest(
-        message="Show all",
-        scope=WsFloatingScope(type="project"),
-    )
-    assert frame.scope.id is None
-
-
-def test_floating_request_serializes():
-    frame = WsFloatingRequest(
-        message="Test",
-        scope=WsFloatingScope(type="note", id="n-1"),
-    )
-    data = frame.model_dump()
-    assert data["type"] == "floating_request"
-    assert data["scope"]["type"] == "note"
-    assert data["scope"]["id"] == "n-1"
-
-
-def test_floating_request_invalid_scope_type():
-    with pytest.raises(ValidationError):
-        WsFloatingRequest(
-            message="X",
-            scope=WsFloatingScope(type="unknown"),  # type: ignore[arg-type]
-        )
-
-
-def test_floating_request_requires_scope():
-    with pytest.raises(ValidationError):
-        WsFloatingRequest.model_validate({"type": "floating_request", "message": "X"})
-
-
 # ── WsStreamStart ─────────────────────────────────────────────────────
 
 
@@ -189,51 +138,3 @@ def test_stream_end_deserializes():
     assert frame.request_id == "r3"
 
 
-# ── WsFloatingDomain ─────────────────────────────────────────────────────
-
-
-def test_floating_domain_tasks():
-    frame = WsFloatingDomain(request_id="r1", domain=WsDomain(type="task"))
-    assert frame.type == WsFrameType.floating_domain
-    assert frame.domain.type == "task"
-
-
-def test_floating_domain_valid_domains():
-    frame = WsFloatingDomain(
-        request_id="r1",
-        domain=WsDomain(type="project", id="213213-312321-312312-421321", section="task"),
-    )
-    assert frame.domain.type == "project"
-    assert frame.domain.id == "213213-312321-312312-421321"
-    assert frame.domain.section == "task"
-
-
-def test_floating_domain_object_valid():
-    frame = WsFloatingDomain(
-        request_id="r1",
-        domain=WsDomain(type="project", id="p1", section="task"),
-    )
-    assert frame.domain.type == "project"
-
-
-def test_floating_domain_serializes():
-    d = WsFloatingDomain(
-        request_id="r1",
-        domain=WsDomain(type="timeline"),
-    ).model_dump()
-    assert d == {
-        "type": "floating_domain",
-        "request_id": "r1",
-        "domain": {"type": "timeline", "id": None, "section": None},
-    }
-
-
-def test_floating_domain_deserializes():
-    raw = {
-        "type": "floating_domain",
-        "request_id": "r1",
-        "domain": {"type": "node", "id": "n-1", "section": None},
-    }
-    frame = WsFloatingDomain.model_validate(raw)
-    assert frame.domain.type == "node"
-    assert frame.domain.id == "n-1"