fix: pi container repo mount target and npm update permissions

- Add Alembic migration to update built-in pi-agent manifest:
  * repo mount target from /workspace to ~/{{WORKSPACE_NAME}}
  * keep /workspace as compatibility symlink via working_dir
  * update startup chown target to $HOME/$WORKSPACE_NAME
- Pass REPO_NAME and WORKSPACE_NAME to compile_compose from instance_service
- Substitute {{WORKSPACE_NAME}} in manifest mount targets and expose it as
  a container env var so the entrypoint can create the /workspace symlink
- Generate entrypoint workspace symlink from runtime WORKSPACE_NAME env var
- Install npm_global packages into {home_dir}/.npm-global with PATH so the
  non-root container user can update global packages
- Update manifest compiler unit tests for the new behavior

Quality gates:
- pytest tests/unit: 207 passed
- ruff: clean on changed files
- mypy: clean on changed files
- alembic heads: single head

openspec/changes/.pi-map.index.md

@@ -1,37 +1,40 @@
-# changes (index)
-dir: changes
+# openspec/changes (index)
+dir: openspec/changes
 
 ## role
-Package for tracking, storing, and managing file changes or diffs in the project.
+Manages change tracking and versioning for OpenAPI specification modifications
 ## parent
-index: ./.pi-map.index.md
-map: ./.pi-map.md
+index: openspec/.pi-map.index.md
+map: openspec/.pi-map.md
 ## children
-- changes/archive
-  index: changes/archive/.pi-map.index.md
-  map: changes/archive/.pi-map.md
-- changes/fix-terminal-container-overflow
-  index: changes/fix-terminal-container-overflow/.pi-map.index.md
-  map: changes/fix-terminal-container-overflow/.pi-map.md
-- changes/fix-tmux-mouse-config
-  index: changes/fix-tmux-mouse-config/.pi-map.index.md
-  map: changes/fix-tmux-mouse-config/.pi-map.md
-- changes/mobile-config-profiles-ui
-  index: changes/mobile-config-profiles-ui/.pi-map.index.md
-  map: changes/mobile-config-profiles-ui/.pi-map.md
-- changes/mobile-edit-default-bottom-actions
-  index: changes/mobile-edit-default-bottom-actions/.pi-map.index.md
-  map: changes/mobile-edit-default-bottom-actions/.pi-map.md
-- changes/mobile-list-delete-button
-  index: changes/mobile-list-delete-button/.pi-map.index.md
-  map: changes/mobile-list-delete-button/.pi-map.md
-- changes/mobile-tool-profile-ui
-  index: changes/mobile-tool-profile-ui/.pi-map.index.md
-  map: changes/mobile-tool-profile-ui/.pi-map.md
+- openspec/changes/archive
+  index: openspec/changes/archive/.pi-map.index.md
+  map: openspec/changes/archive/.pi-map.md
+- openspec/changes/fix-pi-container-mount-permissions
+  index: openspec/changes/fix-pi-container-mount-permissions/.pi-map.index.md
+  map: openspec/changes/fix-pi-container-mount-permissions/.pi-map.md
+- openspec/changes/fix-terminal-container-overflow
+  index: openspec/changes/fix-terminal-container-overflow/.pi-map.index.md
+  map: openspec/changes/fix-terminal-container-overflow/.pi-map.md
+- openspec/changes/fix-tmux-mouse-config
+  index: openspec/changes/fix-tmux-mouse-config/.pi-map.index.md
+  map: openspec/changes/fix-tmux-mouse-config/.pi-map.md
+- openspec/changes/mobile-config-profiles-ui
+  index: openspec/changes/mobile-config-profiles-ui/.pi-map.index.md
+  map: openspec/changes/mobile-config-profiles-ui/.pi-map.md
+- openspec/changes/mobile-edit-default-bottom-actions
+  index: openspec/changes/mobile-edit-default-bottom-actions/.pi-map.index.md
+  map: openspec/changes/mobile-edit-default-bottom-actions/.pi-map.md
+- openspec/changes/mobile-list-delete-button
+  index: openspec/changes/mobile-list-delete-button/.pi-map.index.md
+  map: openspec/changes/mobile-list-delete-button/.pi-map.md
+- openspec/changes/mobile-tool-profile-ui
+  index: openspec/changes/mobile-tool-profile-ui/.pi-map.index.md
+  map: openspec/changes/mobile-tool-profile-ui/.pi-map.md
 ## files
 ## links
-index: changes/.pi-map.index.md
-map: changes/.pi-map.md
+index: openspec/changes/.pi-map.index.md
+map: openspec/changes/.pi-map.md
 ## workflows
 -
 ## dirty