Two bugs prevented clicking Artifacts entries from opening files:
1. collectSessionArtifacts() only read S.toolCalls, but
_syncToolCallsForLoadedMessages clears it when messages carry
their own tool_calls/tool_use metadata. Fix: also scan messages'
structured tool data (OpenAI tool_calls array + Anthropic
tool_use content blocks).
2. openArtifactPath() only stripped ~/ and ./ prefixes. When artifact
paths were absolute (e.g. /mnt/.../workspace/file.js), /api/list
received the full absolute path and returned 404. Fix: strip the
session workspace prefix before calling _workspacePathExists.
Bonus: renderSessionArtifacts() now displays workspace-relative paths
instead of cluttered absolute paths in the artifact list.
fae5ada40d
