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/specs/mobile-tools-navigation/.pi-map.index.md

@@ -0,0 +1,19 @@
+# openspec/specs/mobile-tools-navigation (index)
+dir: openspec/specs/mobile-tools-navigation
+
+## role
+Defines the specification for mobile bottom navigation UI behavior and interaction patterns for the Tools menu.
+## parent
+index: openspec/specs/.pi-map.index.md
+map: openspec/specs/.pi-map.md
+## children
+-
+## files
+- spec.md
+## links
+index: openspec/specs/mobile-tools-navigation/.pi-map.index.md
+map: openspec/specs/mobile-tools-navigation/.pi-map.md
+## workflows
+-
+## dirty
+-

openspec/specs/mobile-tools-navigation/.pi-map.md

@@ -0,0 +1,19 @@
+# openspec/specs/mobile-tools-navigation
+dir: openspec/specs/mobile-tools-navigation
+
+index: openspec/specs/mobile-tools-navigation/.pi-map.index.md
+
+## role
+Defines the specification for mobile bottom navigation UI behavior and interaction patterns for the Tools menu.
+## files
+- spec.md | Defines mobile UI requirements for a grouped "Tools" bottom navigation with a bottom sheet menu and active state indication
+## arch
+Specification-driven design using markdown-based requirements documentation with behavioral state definitions for UI components.
+## tags
+bottom, spec, defines, mobile, requirements, grouped, tools, navigation
+## symbols
+-
+## workflows
+-
+## dirty
+-