added bulk ops + orphaned tag cleanup

- Bulk delete and retag from browse page with checkboxes
- Select all / deselect all toggle
- Delete confirmation shows count of selected pages
- Auto-cleanup orphaned tags on delete, edit, and bulk actions

handlers.py

@@ -174,6 +174,11 @@ def _set_page_tags(page_id, tag_string, db=None):
         return_db(db)
 
 
+def _cleanup_orphaned_tags(db):
+    """Delete tags that have no page associations."""
+    db.execute("DELETE FROM tags WHERE id NOT IN (SELECT DISTINCT tag_id FROM page_tags)")
+
+
 # --- Route handlers ---
 
 
@@ -499,7 +504,8 @@ def handle_pages(query=None):
                 tag_links = " ".join(f'<a href="/tags/{esc(t)}">[{esc(t)}]</a>' for t in tags)
                 tags_html = f' {tag_links}'
             items += (
-                f'<li>{esc(r["title"])}{note_html}{tags_html} '
+                f'<li><label><input type="checkbox" name="ids" value="{r["id"]}"> '
+                f'{esc(r["title"])}</label>{note_html}{tags_html} '
                 f'<small>(<a href="{esc(r["url"])}" rel="noreferrer noopener">{esc(r["url"])}</a>)</small> '
                 f'<a href="/edit/{r["id"]}">edit</a> '
                 f'<a href="/delete/{r["id"]}">remove</a></li>'
@@ -509,13 +515,71 @@ def handle_pages(query=None):
     return _respond(
         f"<h1>indexed pages ({total})</h1>"
         f"{msg_html}"
+        f'<form method="post" action="/pages/bulk">'
+        f'{_csrf_field()}'
+        f'<p><label><input type="checkbox" id="select-all"> select all</label></p>'
         f"<ul>{items}</ul>"
         f'{_page_nav(page, total, "/pages", BROWSE_PER_PAGE)}'
+        f'<details><summary>bulk actions</summary>'
+        f'<p><button type="submit" name="action" value="delete" id="bulk-delete">delete selected</button></p>'
+        f'<p><input name="bulk_tags" placeholder="tags (comma-separated)" size="40"> '
+        f'<select name="tag_mode"><option value="add">add tags</option><option value="replace">replace tags</option></select> '
+        f'<button type="submit" name="action" value="retag">retag selected</button></p>'
+        f'</details>'
+        f'</form>'
+        f'<script>'
+        f'document.getElementById("select-all").addEventListener("change",function(){{'
+        f'document.querySelectorAll("input[name=ids]").forEach(function(c){{c.checked=this.checked}}.bind(this))'
+        f'}});'
+        f'document.getElementById("bulk-delete").addEventListener("click",function(e){{'
+        f'var n=document.querySelectorAll("input[name=ids]:checked").length;'
+        f'if(!n){{e.preventDefault();return}}'
+        f'if(!confirm("Delete "+n+" selected page"+(n===1?"":"s")+"?"))e.preventDefault()'
+        f'}});'
+        f'</script>'
         f'<p><a href="/export">export</a> | <a href="/import">import</a></p>'
         f'<a href="/">back</a>'
     )
 
 
+def handle_bulk_action(body):
+    ids = body.get("ids", [])
+    action = body.get("action", [""])[0]
+    if not ids:
+        return _redirect("/pages")
+    # Validate all ids are integers
+    try:
+        page_ids = [int(i) for i in ids]
+    except ValueError:
+        return _error(400)
+    db = get_db()
+    try:
+        if action == "delete":
+            for pid in page_ids:
+                db.execute("DELETE FROM page_tags WHERE page_id = ?", (pid,))
+                db.execute("DELETE FROM links WHERE page_id = ?", (pid,))
+                db.execute("DELETE FROM pages WHERE id = ?", (pid,))
+            _cleanup_orphaned_tags(db)
+            db.commit()
+        elif action == "retag":
+            bulk_tags = body.get("bulk_tags", [""])[0].strip()
+            tag_mode = body.get("tag_mode", ["add"])[0]
+            if bulk_tags:
+                for pid in page_ids:
+                    if tag_mode == "add":
+                        existing = _get_page_tags(pid, db)
+                        new_tags = [t.strip().lower() for t in bulk_tags.split(",") if t.strip()]
+                        merged = ", ".join(sorted(set(existing + new_tags)))
+                        _set_page_tags(pid, merged, db)
+                    else:
+                        _set_page_tags(pid, bulk_tags, db)
+                _cleanup_orphaned_tags(db)
+                db.commit()
+    finally:
+        return_db(db)
+    return _redirect("/pages")
+
+
 def handle_edit_form(page_id, msg=""):
     db = get_db()
     try:
@@ -561,6 +625,7 @@ def handle_edit_submit(page_id, body):
         )
 
         _set_page_tags(page_id, tags, db)
+        _cleanup_orphaned_tags(db)
 
         db.commit()
 
@@ -596,6 +661,7 @@ def handle_delete(page_id):
         db.execute("DELETE FROM page_tags WHERE page_id = ?", (page_id,))
         db.execute("DELETE FROM links WHERE page_id = ?", (page_id,))
         db.execute("DELETE FROM pages WHERE id = ?", (page_id,))
+        _cleanup_orphaned_tags(db)
         db.commit()
     finally:
         return_db(db)
@@ -1344,6 +1410,8 @@ def _dispatch_inner(data):
             return _respond("<h1>403 Forbidden</h1><p>Invalid or missing CSRF token.</p>", status=403)
         if path == "/add":
             return handle_add_submit(body)
+        elif path == "/pages/bulk":
+            return handle_bulk_action(body)
         elif path == "/add/manual":
             return handle_add_manual_submit(body)
         elif path.startswith("/edit/"):