Prompt to move legacy cloud projects into Personal Cloud

[franknoirot]

Summary

• detects cloud-synced projects that still live in non-cloud directory libraries
• shows a non-blocking Home migration prompt to move those projects into Personal Cloud
• adds moveCloudSyncProjectToDirectory to move local storage and rewrite cloud sync metadata/outbox paths
• blocks the move when Personal Cloud already contains a project with the same remote project id

Why

Internal users may already have cloud-synced projects stored inside normal directory libraries. Once Personal Cloud is displayed as its own library, those projects can appear in confusing duplicate locations. This PR keeps existing sync behavior working while offering an explicit, reviewable move into the canonical Personal Cloud local storage root.

This stays separate from #12574's default-library policy. #12574 handles the normal Personal Cloud library lifecycle, including the web behavior where the existing browser project storage is represented as Personal Cloud without a physical OPFS move. This PR only handles the explicit legacy duplicate-location case.

Stack

• Depends on Add Personal Cloud project library #12574 for the Personal Cloud project library and web default-library policy.
• Add Personal Cloud project library #12574 depends on Let project library types render settings details #12579 for project-library settings details.

Validation

• npm run test -- src/lib/cloudSync/legacyProjectMigration.test.ts src/lib/cloudSync/disconnect.spec.ts src/lib/cloudSync/registry/plugin.spec.tsx
• npm run tsc -- --noEmit
• npm run lint -- src/lib/cloudSync/disconnect.spec.ts src/lib/cloudSync/engine.ts src/lib/cloudSync/legacyProjectMigration.test.ts src/lib/cloudSync/legacyProjectMigration.ts src/lib/cloudSync/registry/contract.ts src/lib/cloudSync/registry/extension.ts src/lib/cloudSync/registry/plugin.spec.tsx src/registry/extensions/homeProjects/index.ts src/routes/Home.tsx
• git diff --check codex/cloud-project-library...HEAD

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Project	Deployment	Actions	Updated (UTC)
modeling-app	Ready	Preview, Comment	Jul 24, 2026 12:31am