Land CSOC-WP-0006 PageOps: member space/page CRUD, copy, transfer

Thin CONTENT_ROOT content plane (ADR-0003/0004) with space visual field,
product UI for Title/Abstract/Visual, page list sidebar, and tests. Update
capability model and smoke checklist; mark WP-0006 finished.

tests/test_pageops.py

@@ -0,0 +1,87 @@
+"""PageOps content-plane unit tests (ADR-0003 / ADR-0004)."""
+
+from pathlib import Path
+
+import pytest
+
+from coulomb_social.apps.spaces import pageops
+
+
+@pytest.fixture
+def content_root(tmp_path, settings):
+    root = tmp_path / "content"
+    settings.CONTENT_ROOT = str(root)
+    return root
+
+
+def test_write_read_list_page(content_root):
+    pageops.init_space_content("lab", title="Lab", abstractor="Research", visual="assets/c.jpg")
+    doc = pageops.write_page(
+        "lab",
+        "notes",
+        title="Notes",
+        abstractor="Scratch",
+        visual="assets/n.jpg",
+        body="# Notes\n\nHello.\n",
+    )
+    assert doc.exists
+    assert doc.title == "Notes"
+    assert doc.abstractor == "Scratch"
+    assert "Hello" in doc.body
+
+    pages = pageops.list_pages("lab")
+    slugs = [p.slug for p in pages]
+    assert slugs[0] == "index"
+    assert "notes" in slugs
+
+    path = Path(doc.path)
+    assert path.is_file()
+    text = path.read_text(encoding="utf-8")
+    assert text.startswith("---\n")
+    assert 'title: "Notes"' in text or "title: Notes" in text or 'title: "Notes"' in text
+
+
+def test_copy_page_same_space(content_root):
+    pageops.init_space_content("lab", title="Lab")
+    pageops.write_page("lab", "alpha", title="Alpha", body="Body A\n")
+    copy = pageops.copy_page("lab", "alpha", "lab", "alpha-copy")
+    assert copy.slug == "alpha-copy"
+    assert copy.title == "Alpha (copy)"
+    assert "Body A" in copy.body
+    assert pageops.read_page("lab", "alpha").exists
+
+
+def test_transfer_page(content_root):
+    pageops.init_space_content("src", title="Src")
+    pageops.init_space_content("dst", title="Dst")
+    pageops.write_page("src", "moved", title="Moved", abstractor="A", body="X\n")
+    doc = pageops.transfer_page("src", "moved", "dst", "moved")
+    assert doc.exists
+    assert doc.title == "Moved"
+    assert not pageops.read_page("src", "moved").exists
+    assert pageops.read_page("dst", "moved").exists
+
+
+def test_cannot_delete_or_transfer_index(content_root):
+    pageops.init_space_content("lab", title="Lab")
+    with pytest.raises(pageops.PageOpsError):
+        pageops.delete_page("lab", "index")
+    with pytest.raises(pageops.PageOpsError):
+        pageops.transfer_page("lab", "index", "other")
+
+
+def test_copy_relative_visual_asset(content_root):
+    pageops.init_space_content("lab", title="Lab")
+    assets = pageops.assets_dir("lab")
+    assets.mkdir(parents=True, exist_ok=True)
+    (assets / "cover.png").write_bytes(b"\x89PNG\r\n")
+    pageops.write_page(
+        "lab",
+        "with-pic",
+        title="Pic",
+        visual="assets/cover.png",
+        body="pic\n",
+    )
+    copy = pageops.copy_page("lab", "with-pic", "lab", "with-pic-copy")
+    assert copy.visual.startswith("assets/")
+    assert (pageops.space_dir("lab") / copy.visual).is_file()