merge: resolve conflicts with main

- Take main's router.go, rich-text-editor.tsx, comment-card.tsx
- Remove deleted daemon_pairing.go
- Keep issue mention card feature

server/pkg/db/queries/agent.sql

@@ -124,6 +124,12 @@ WHERE issue_id = $1 AND status IN ('queued', 'dispatched', 'running');
 SELECT count(*) > 0 AS has_pending FROM agent_task_queue
 WHERE issue_id = $1 AND status IN ('queued', 'dispatched');
 
+-- name: HasPendingTaskForIssueAndAgent :one
+-- Returns true if a specific agent already has a queued or dispatched task
+-- for the given issue. Used by @mention trigger dedup.
+SELECT count(*) > 0 AS has_pending FROM agent_task_queue
+WHERE issue_id = $1 AND agent_id = $2 AND status IN ('queued', 'dispatched');
+
 -- name: ListPendingTasksByRuntime :many
 SELECT * FROM agent_task_queue
 WHERE runtime_id = $1 AND status IN ('queued', 'dispatched')

server/pkg/db/queries/attachment.sql

@@ -0,0 +1,26 @@
+-- name: CreateAttachment :one
+INSERT INTO attachment (workspace_id, issue_id, comment_id, uploader_type, uploader_id, filename, url, content_type, size_bytes)
+VALUES ($1, sqlc.narg(issue_id), sqlc.narg(comment_id), $2, $3, $4, $5, $6, $7)
+RETURNING *;
+
+-- name: ListAttachmentsByIssue :many
+SELECT * FROM attachment
+WHERE issue_id = $1 AND workspace_id = $2
+ORDER BY created_at ASC;
+
+-- name: ListAttachmentsByComment :many
+SELECT * FROM attachment
+WHERE comment_id = $1 AND workspace_id = $2
+ORDER BY created_at ASC;
+
+-- name: GetAttachment :one
+SELECT * FROM attachment
+WHERE id = $1 AND workspace_id = $2;
+
+-- name: ListAttachmentsByCommentIDs :many
+SELECT * FROM attachment
+WHERE comment_id = ANY($1::uuid[])
+ORDER BY created_at ASC;
+
+-- name: DeleteAttachment :exec
+DELETE FROM attachment WHERE id = $1 AND workspace_id = $2;