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ksmithandClaude Sonnet 5
12264b4d18
Mirrors the existing @-mention system's shape: a regex finds #roomname tokens, extract_referenced_room_ids validates them against rooms the *sender* actually belongs to (mirrors mentions' "must be a real member" rule -- referencing a private room the sender isn't in would otherwise leak its existence), and a MessageRoomReference join row is stored per match in create_message. No notification/unread layer, unlike mentions -- referencing a room has no "you were referenced" semantics. Rendering is the same markdown-link rewrite trick MessageContent.tsx already uses for mentions (#username -> [#username](mention:username)), but resolved against the *viewer's* own room list (threaded down from ChatShellPage's room state through ChatPane/MessageList) rather than the stored server-side reference -- a reference to a room the current viewer isn't in quietly renders as plain text instead of a link, same as an @mention of someone outside the room does. The href scheme renders a real react-router Link instead of mentions' inert span, since a room reference is meant to be navigable. mention_service.strip_code_spans (was _strip_code_spans) is now shared between both extraction paths rather than private to one module. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>