fix: Library page — hover effects, workspace filter, tree, rename

1. Hover effects fixed: converted table to div-based flexbox layout
   (tr/td don't support display:flex). .lib-row now properly shows
   drag handle, checkbox, and OPEN button on hover.

2. Recents filter by workspace: /api/library/recents now accepts
   workspace_id parameter. Template passes active_workspace_id from
   sidebar context to API calls.

3. Tree hierarchy: API now enriches items with has_children via
   _enrich_children() batch query — shows expand chevrons for
   pages with sub-pages.

4. Rename on click: single click on title starts inline rename
   (was opening page). OPEN button still opens side peek.

5. Code cleanup: extracted _enrich_children() helper to eliminate
   duplicate code across 6 endpoints.

app/routers/dashboard.py

@@ -220,6 +220,7 @@ async def library_page(request: Request, owner: str = Query(default=""), repo: s
         sidebar["nav_workspace_id"] = ws["id"] if ws else 0
 
     template = env.get_template("library.html")
+    sidebar["active_workspace_id"] = sidebar.get("nav_workspace_id", 0)
     return template.render(**sidebar)
 
 

app/routers/library.py

@@ -100,6 +100,25 @@ def _rows_to_items(rows, uid: int = 1) -> list:
     return [_build_item(dict(r), uid) for r in rows]
 
 
+def _enrich_children(items: list) -> list:
+    """Add has_children info to items in a single batch query."""
+    if not items:
+        return items
+    ids = [it["id"] for it in items]
+    placeholders = ",".join(["?" for _ in ids])
+    with get_conn() as conn:
+        child_rows = conn.execute(
+            f"SELECT parent_id, COUNT(*) as cnt FROM pages "
+            f"WHERE parent_id IN ({placeholders}) AND deleted_at IS NULL "
+            f"GROUP BY parent_id",
+            ids,
+        ).fetchall()
+    child_counts = {r["parent_id"]: r["cnt"] for r in child_rows}
+    for it in items:
+        it["has_children"] = bool(child_counts.get(it["id"], 0))
+    return items
+
+
 # ═══════════ Tab endpoints ═══════════
 
 BASE_SELECT = (
@@ -113,6 +132,7 @@ async def library_recents(
     request: Request,
     source_type: str = Query(default="all"),
     tree: int = Query(default=0),
+    workspace_id: int = Query(default=0),
 ):
     if source_type not in SOURCE_TYPES:
         source_type = "all"
@@ -120,6 +140,12 @@ async def library_recents(
     uid = _get_user_id(request)
     query = f"{BASE_SELECT} FROM pages p WHERE p.parent_section != 'Trash' AND p.deleted_at IS NULL"
     params: list = []
+
+    # Filter by active workspace
+    if workspace_id:
+        query += " AND p.workspace_id = ?"
+        params.append(workspace_id)
+
     query, params = _apply_source_filter(query, params, source_type)
     query += " ORDER BY p.updated_at DESC LIMIT 50"
 
@@ -127,6 +153,7 @@ async def library_recents(
         rows = conn.execute(query, params).fetchall()
 
     items = _rows_to_items(rows, uid)
+    _enrich_children(items)
     return {"items": items}
 
 
@@ -154,6 +181,7 @@ async def library_favorites(
         rows = conn.execute(query, params).fetchall()
 
     items = _rows_to_items(rows, uid)
+    _enrich_children(items)
     return {"items": items}
 
 
@@ -176,6 +204,7 @@ async def library_shared(
         rows = conn.execute(query, params).fetchall()
 
     items = _rows_to_items(rows, uid)
+    _enrich_children(items)
     return {"items": items}
 
 
@@ -198,6 +227,7 @@ async def library_published(
         rows = conn.execute(query, params).fetchall()
 
     items = _rows_to_items(rows, uid)
+    _enrich_children(items)
     return {"items": items}
 
 
@@ -220,6 +250,7 @@ async def library_private(
         rows = conn.execute(query, params).fetchall()
 
     items = _rows_to_items(rows, uid)
+    _enrich_children(items)
     return {"items": items}
 
 
@@ -242,4 +273,5 @@ async def library_workspace(
         rows = conn.execute(query, params).fetchall()
 
     items = _rows_to_items(rows, uid)
+    _enrich_children(items)
     return {"items": items}