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-workspace-visual-overhaul/.pi-map.md

@@ -0,0 +1,22 @@
+# openspec/changes/archive/2026-05-19-workspace-visual-overhaul
+dir: openspec/changes/archive/2026-05-19-workspace-visual-overhaul
+
+index: openspec/changes/archive/2026-05-19-workspace-visual-overhaul/.pi-map.index.md
+
+## role
+Archive of design specifications and project planning documents for a workspace visual overhaul initiative
+## files
+- .openspec.yaml | Defines an OpenSpec configuration file with schema type and creation date metadata
+- design.md | Design document for a workspace visual overhaul featuring a new project header, consolidated settings page with tabs, simplified sidebar, and updated routing structure. | dep: React/TypeScript component system, CSS variables/styling system, React Router, existing project API endpoints
+- proposal.md | Proposes a UI/UX redesign of a repository workspace to follow GitHub-style layout conventions
+- tasks.md | Project task list tracking a multi-phase UI overhaul for a workspace/settings interface with repository management, sidebar cleanup, and polish items
+## arch
+Documentation-driven specification pattern with structured design docs (design/proposal/tasks) using YAML metadata and phased task tracking for UI/UX redesign
+## tags
+design, workspace, .openspec, overhaul, project, settings, sidebar, repository
+## symbols
+-
+## workflows
+-
+## dirty
+-