feat(marketing): project-branded drafts + project badges on the X/video queues (#570)

Item B+C of the video/X per-project targeting spec, plus the
company_goals.company_name field they depend on (migration 075).

- CompanyGoalsService.resolve_product_name is the single fallback chain
  (project name -> charter company_name -> RoboCo); XEngine and
  VideoEngine both call it and their prompt builders are pure functions
  taking product_name — release posts/videos stop hardcoding RoboCo.
- The X and video queue responses carry project_slug/project_name via one
  shared unloaded-guard helper (api/schemas/project_fields.py); both
  panel queues render a shared ProjectBadge so multi-project drafts are
  tellable apart.
- Business -> Goals editor gains the company-name input.
- Fixes a pre-existing test-isolation leak: the company-goals routes test
  commits the charter singleton into the session-scoped test DB and
  polluted later suites; it now deletes the row on teardown.

Co-authored-by: Renn F <rennf93@users.noreply.github.com>

tests/unit/api/routes/test_x_project_fields.py

@@ -0,0 +1,79 @@
+"""``roboco/api/routes/x.py`` response-builder wiring for project_slug/
+project_name. The sa_inspect(task).unloaded guard branches themselves are
+covered once on the shared helper in tests/unit/api/schemas/test_project_fields.py
+— this only asserts _to_response/_to_history_response actually populate
+the response from it (loaded case; a real ORM task always resolves the
+"loaded" branch since ``project`` is lazy="joined")."""
+
+from __future__ import annotations
+
+from types import SimpleNamespace
+from typing import Any
+from unittest.mock import MagicMock, patch
+
+from roboco.api.routes.x import _to_history_response, _to_response
+
+
+def _stub_task(*, with_project: bool = False) -> Any:
+    """A TaskTable stand-in matching _to_response/_to_history_response's reads."""
+    return SimpleNamespace(
+        id="task-1",
+        source="x_post",
+        title="X post: release v1.0.0",
+        status="pending",
+        description="",
+        orchestration_markers=None,
+        project=(
+            SimpleNamespace(slug="acme-robotics", name="Acme Robotics")
+            if with_project
+            else None
+        ),
+        updated_at=None,
+        created_at="2026-07-18T00:00:00+00:00",
+    )
+
+
+def _loaded_inspector() -> MagicMock:
+    inspector = MagicMock()
+    inspector.unloaded = set()
+    return inspector
+
+
+def test_to_response_includes_project_fields_when_loaded() -> None:
+    with patch(
+        "roboco.api.schemas.project_fields.sa_inspect",
+        return_value=_loaded_inspector(),
+    ):
+        resp = _to_response(_stub_task(with_project=True))
+    assert resp.project_slug == "acme-robotics"
+    assert resp.project_name == "Acme Robotics"
+
+
+def test_to_response_omits_project_fields_when_project_unset() -> None:
+    with patch(
+        "roboco.api.schemas.project_fields.sa_inspect",
+        return_value=_loaded_inspector(),
+    ):
+        resp = _to_response(_stub_task(with_project=False))
+    assert resp.project_slug is None
+    assert resp.project_name is None
+
+
+def test_to_history_response_includes_project_fields_when_loaded() -> None:
+    with patch(
+        "roboco.api.schemas.project_fields.sa_inspect",
+        return_value=_loaded_inspector(),
+    ):
+        resp = _to_history_response(_stub_task(with_project=True))
+    assert resp.project_slug == "acme-robotics"
+    assert resp.project_name == "Acme Robotics"
+
+
+def test_to_history_response_omits_project_fields_when_project_unset() -> None:
+    with patch(
+        "roboco.api.schemas.project_fields.sa_inspect",
+        return_value=_loaded_inspector(),
+    ):
+        resp = _to_history_response(_stub_task(with_project=False))
+    assert resp.project_slug is None
+    assert resp.project_name is None