chore: archive 15 completed OpenSpec changes

Move the following audited-and-implemented changes into
openspec/changes/archive/2026-06-12-completed-changes-archive/:

- backend-frontend-refactoring
- config-profile-git-mounts
- config-profile-includes-ui
- config-profile-multi-repo-mounts
- container-monitoring-notifications
- git-mount-url-validation
- home-path-expansion
- mobile-terminal-ux
- mount-specificity-ordering
- notification-center
- persistent-terminal-sessions
- session-list-overhaul
- ssh-key-mounting
- terminal-fullscreen-unified-header
- tool-session-progress-and-updates

Also regenerated .pi-map*.md files for openspec/changes so the
remaining active changes (multi-session-terminal-ux, reorganize-long-files,
working-copies, workspace-first-ui) reflect the new layout.

openspec/changes/archive/2026-05-19-smart-git-url-parsing/.pi-map.md

@@ -1,17 +1,17 @@
-# openspec/changes/archive/2026-05-19-smart-git-url-parsing
-dir: openspec/changes/archive/2026-05-19-smart-git-url-parsing
+# archive/2026-05-19-smart-git-url-parsing
+dir: archive/2026-05-19-smart-git-url-parsing
 
-index: openspec/changes/archive/2026-05-19-smart-git-url-parsing/.pi-map.index.md
+index: archive/2026-05-19-smart-git-url-parsing/.pi-map.index.md
 
 ## role
-Contains archived design documents and specifications for a smart Git URL parsing feature that converts browser URLs to clone URLs during repository creation.
+Prototype package containing design documents and specifications for a smart Git URL parsing feature that normalizes browser URLs to cloneable Git URLs
 ## files
 - .openspec.yaml | Defines an OpenSpec configuration file with schema type and creation date metadata
 - design.md | Design document for a smart Git URL parsing feature that detects browser URLs from GitHub/GitLab/Bitbucket and converts them to valid clone URLs
 - proposal.md | Proposes a feature to intelligently parse and correct malformed Git repository URLs pasted by users during repository creation
 - tasks.md | Project task breakdown for implementing smart Git URL parsing across backend and frontend with validation, suggestion, and user confirmation flows | dep: FastAPI, Python, TypeScript, React, ruff, mypy, pytest
 ## arch
-Documentation-driven specification with markdown-based design documents (proposal, design, tasks) and YAML metadata, following a structured change proposal pattern for cross-functional (backend/frontend) feature development.
+Document-driven specification pattern with OpenSpec schema configuration, separated into design rationale (design.md), feature proposal (proposal.md), and implementation task tracking (tasks.md)
 ## tags
 design, git, urls, creation, .openspec, smart, url, parsing
 ## symbols