Session picker hides all sessions after the folder's .git directory is removed (project re-keying); CLI `session list` still shows them

Description

OpenCode keys sessions to a per-project id derived from the enclosing git repo.
If that repo is removed (e.g. deleting an unused/accidental .git in a plain folder), the directory re-keys to the global project. The TUI session picker then hides every pre-existing session for that folder, with no UI path to discover them. The data is intact: opencode -s <sessionID> resumes them, and opencode session list in the same directory still lists them. Only the picker's filter excludes them.

Additional observations

• The CLI and the TUI disagree: opencode session list in the same directory lists the hidden sessions; the picker does not. The picker applies a project/subpath filter the CLI does not.
• Root cause (from reading the dev branch): the picker query defaults to a subpath filter (sessionListQuery() in packages/tui/src/context/sync.tsx, gated by the session_directory_filter_enabled kv), while sessions persist project_id plus a path subpath computed at creation time (packages/core/src/session.ts: path.relative(project.directory, directory)). After repo removal, old sessions keep project_id = <repo project> and path = "" (project root), new sessions get project = global and path = "home/user/..." - so the filter never matches the old rows again.
• Recovery that worked for me (opencode closed, ~/.local/share/opencode/opencode.db):

  UPDATE session SET project_id='global', path='<dir without leading slash>'
    WHERE directory='<dir>';
  DELETE FROM project_directory WHERE directory='<dir>';  -- stale mapping to the old project
  

  This restored full picker visibility.

Suggested fixes (any one of)

• Match sessions by directory as well as project (directory OR project match)
• Surface a UI toggle for the directory/project filter scope (session_directory_filter_enabled kv exists but I found no UI for it)
• Offer migration of old sessions when a directory's project re-keys

Plugins

opencode-scheduler

OpenCode version

1.18.31

Steps to reproduce

1. mkdir /tmp/repro && cd /tmp/repro && git init # empty repo, zero commits is enough
2. Start opencode, send a few messages so a session exists, then quit opencode
3. rm -rf .git
4. Start opencode again in the same folder and open the session picker.

Actual: the session from step 2 is not listed (picker browse and title search both miss it).
Expected: prior sessions for this directory remain visible, or there is some UI affordance to reach them.

Screenshot and/or share link

No response

Operating System

Arch Linux

Terminal

Terminator