feat: add online presence tracking with last_seen column and configurable timeout

Add `last_seen` column to users table with index, implement `set_last_seen` and `get_online_users` database functions, expose presence config env vars (`PRESENCE_TIMEOUT_SECONDS`, `PRESENCE_ONLINE_LIMIT`, `PRESENCE_ONLINE_MARGIN_SECONDS`), include `last_seen` in follow list responses, and update profile docs to mention online indicator.
2026-07-04 22:08:20 +00:00
parent 7002b23eeb
commit 0f872336b1
41 changed files with 935 additions and 94 deletions
@@ -117,6 +117,12 @@ DOCS_PAGES = [
        "kind": "prose",
        "section": SECTION_GENERAL,
    },
+    {
+        "slug": "presence",
+        "title": "Online presence",
+        "kind": "prose",
+        "section": SECTION_GENERAL,
+    },
    {
        "slug": "ai-correction",
        "title": "AI content correction",