[app-cli] Use InstallStateManager API instead of direct JSON manipulation

Parent Issue

Part of #193 - Consolidate install-state.json manipulation with InstallStateManager

Depends on: #194 (foundation API must be merged first)

Summary

Update amplifier-app-cli to use the new InstallStateManager API from amplifier-foundation instead of directly manipulating install-state.json.

Scope: amplifier-app-cli

Files to Update

1. amplifier_app_cli/utils/update_executor.py

   • Replace _invalidate_modules_with_missing_deps() function
   • Use InstallStateManager.invalidate_modules_with_missing_deps() instead

2. amplifier_app_cli/commands/reset.py

   • Replace direct JSON file deletion/manipulation
   • Use InstallStateManager.clear() instead

Files That Can Be Simplified

3. amplifier_app_cli/paths.py
   • get_install_state_path() may no longer be needed if all access goes through InstallStateManager
   • Or keep it but only for constructing the InstallStateManager instance

Changes Required

update_executor.py

Replace:

def _invalidate_modules_with_missing_deps() -> tuple[int, int]:
    # ~60 lines of direct JSON manipulation
    ...

With:

def _invalidate_modules_with_missing_deps() -> tuple[int, int]:
    from amplifier_foundation.modules.install_state import InstallStateManager
    cache_dir = get_cache_dir()  # or however you get the cache path
    mgr = InstallStateManager(cache_dir)
    return mgr.invalidate_modules_with_missing_deps()

reset.py

Replace direct file operations with:

from amplifier_foundation.modules.install_state import InstallStateManager
mgr = InstallStateManager(cache_dir)
mgr.clear()
mgr.save()

Acceptance Criteria

• update_executor.py uses InstallStateManager.invalidate_modules_with_missing_deps()
• reset.py uses InstallStateManager.clear()
• No direct JSON manipulation of install-state.json remains
• All existing tests pass
• amplifier update still correctly invalidates stale modules
• amplifier reset --remove cache still correctly clears install state

Benefits

• Single source of truth for install state logic
• Consistent behavior between proactive healing and explicit invalidation
• Easier to maintain and evolve the install state format

Start with amplifier_app_cli/utils/update_executor.py and amplifier_app_cli/commands/reset.py, then inspect the InstallStateManager API from dependency #194. Run the existing test suite and verify that update invalidates stale modules and reset --remove cache clears install state without direct install-state.json manipulation.