chore: track all project map and index files

Add generated .pi-map.md and .pi-map.index.md files across the repository
so the project navigation maps are shared and versioned. These artifacts
are maintained by project_map_init/patch/validate and must be kept in
sync with source edits.

Note: .cache/ remains ignored (added in previous commit).

openspec/changes/archive/2026-05-19-git-control/.pi-map.md

@@ -0,0 +1,22 @@
+# openspec/changes/archive/2026-05-19-git-control
+dir: openspec/changes/archive/2026-05-19-git-control
+
+index: openspec/changes/archive/2026-05-19-git-control/.pi-map.index.md
+
+## role
+Documents the design and planning for adding Git version control capabilities to a browser-based repository workspace.
+## files
+- .openspec.yaml | Defines an OpenSpec configuration file with schema type and creation date metadata
+- design.md | Design specification for a Git-based repository management UI with backend API and frontend workspace components | dep: Git, React/TypeScript, REST API, file tree UI components, dialog/modal system
+- proposal.md | Proposes adding git control capabilities (branch management, commit, push/pull, merge) to a browser-based repository workspace that currently only provides read-only access | dep: git, repository workspace, file viewer, branch selector, toolbar
+- tasks.md | Project task tracking document outlining implementation phases for a Git version control feature in a full-stack application | dep: GitPython, FastAPI, React/Vue frontend, pytest, ruff, mypy
+## arch
+Specification-driven design with phased task tracking, separating frontend workspace components from backend API services for git operations.
+## tags
+git, design, .openspec, repository, management, workspace, react, control
+## symbols
+-
+## workflows
+-
+## dirty
+-