various fixes

backend/notes.py

@@ -48,6 +48,24 @@ def note_attachments(body: str) -> tuple[int, str | None]:
     return count, preview
 
 
+def note_snippet(body: str, limit: int = 240) -> str:
+    lines = body.splitlines()
+    start = 0
+    for i, line in enumerate(lines):
+        stripped = line.strip()
+        if not stripped:
+            continue
+        if stripped.startswith("# "):
+            start = i + 1
+            continue
+        start = i
+        break
+    excerpt = "\n".join(lines[start:]).strip()
+    if len(excerpt) > limit:
+        excerpt = excerpt[:limit].rstrip() + "…"
+    return excerpt
+
+
 def note_path(username: str, note_id: str) -> str:
     return f"{username}/{note_id}.md"
 
@@ -293,6 +311,7 @@ async def _attach_meta(notes: list[dict]) -> None:
             count, preview = 0, None
         note["attachments"] = count
         note["image"] = preview
+        note["snippet"] = note_snippet(body)
         note.pop("path", None)