bug: SSE event stream drops all events for worktree sessions #35917

Describe the bug

The SSE event handler in event.ts filters events by event.location?.directory === instance.directory. When a session runs inside a git worktree, the working directory differs from the main workspace (e.g., /home/user/repo-worktree-feature/ vs /home/user/repo/). The directory field in event locations reflects the actual working directory, not the instance's configured directory, so all events fail the filter and are silently dropped.

The TUI receives zero real-time updates — no tool completions, no message streaming, no permission prompts. The session appears frozen.

To reproduce

1. Create a worktree: git worktree add ../repo-worktree-test
2. Open opencode in the worktree: cd ../repo-worktree-test && opencode
3. Send a message
4. Observe: the TUI shows no streaming output, tool results, or live updates

Expected behavior

Worktree sessions should receive SSE events normally. The workspaceID filter already correctly scopes events to the current workspace — the directory filter is redundant and breaks worktree usage.

Environment

• OpenCode 1.17.9