feat: add citation sources for fetch_url tool results
URL fetches now produce clickable citation sources in the UI, matching
the existing behavior of search_web and knowledge file tools. When a
model calls fetch_url during native tool calling, the fetched URL
appears as a citable source with a content preview, giving users full
transparency into what pages the model referenced.
Previously loaded the entire ChatModel (including the full conversation JSON
blob) just to extract the title string. Now queries only the Chat.title
column directly, which is already a top-level DB column.
The GET /chats/shared endpoint was loading full Chat rows including
the entire conversation history JSON blob, only to discard it and
return SharedChatResponse (id, title, share_id, timestamps). Now
uses with_entities() to select only the 5 needed columns, avoiding
deserialization of potentially large chat JSON for every shared chat.
RFC 7644 §3.4.2.4 specifies that out-of-range pagination values MUST be
clamped, not rejected. The previous implementation used FastAPI Query
constraints (ge=1, le=100) which caused a 422 response for values like
startIndex=0 or count=9999 — violating the spec.
For both /Users and /Groups:
- startIndex < 1 is now treated as 1 (spec: "SHALL be interpreted as 1")
- count < 0 is now treated as 0 (spec: "SHALL be interpreted as 0")
- count > 100 is clamped to the server maximum of 100
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
When models reference functions (via filterIds/actionIds) that no longer
exist in the database, the /api/models endpoint crashes with a 500 error,
preventing the UI from loading chats entirely. This can happen after
upgrades when built-in functions are removed or when user-created
functions are deleted while still referenced by models.
Instead of raising an exception, log at INFO level and skip the missing
function so the rest of the models load successfully.
Fixes#21464https://claude.ai/code/session_015JRM7m2bNeZPBBmV2Gv4Mj
Co-authored-by: Claude <noreply@anthropic.com>
