refactor(storage): rename mesh-storage URIs to studio-storage with back-compat

[viktormarinho]

Summary

De-mesh task 05: renames the mesh-storage:// URI scheme and its helpers to studio-storage:// equivalents.

• packages/harness/src/decopilot/mesh-storage-uri.ts → studio-storage-uri.ts: toMeshStorageUri → toStudioStorageUri, parseMeshStorageKey → parseStudioStorageKey, meshStorageRegex → studioStorageRegex.
• Mesh-app re-export renamed (apps/mesh/src/api/routes/decopilot/studio-storage-uri.ts); all call sites updated (file-materializer, portable built-in tools, cluster-research-job, web chat components, prompts/comments).

Persistence analysis

These URIs are persisted: uploadFileParts (file-materializer) stores them in DB thread message parts and in annotation text, and tool results carrying resultUri land in message parts too. Therefore:

Back-compat guarantees

• Parser accepts the legacy mesh-storage:// scheme indefinitely (parseStudioStorageKey), and studioStorageRegex matches both schemes — old threads keep resolving to presigned URLs.
• Writers only emit studio-storage:// from now on.
• No breaking change for stored data; the only observable change is the scheme on newly written URIs (the e2e wire-contract assertion in decopilot-thread-queue.spec.ts was updated accordingly).

Testing

• New unit tests in packages/harness/src/decopilot/studio-storage-uri.test.ts prove legacy mesh-storage:// URIs still parse to the identical key and the regex captures keys from both schemes.
• bun run fmt, bun run lint (0 errors), bun run check (all workspaces pass), targeted bun test (11 pass) — full suite has known pre-existing DB-backed failures locally.

🤖 Generated with Claude Code

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Summary by cubic

Renamed the storage URI scheme from mesh-storage:// to studio-storage://. Writers now emit studio-storage://, while the parser and regex accept both schemes to keep old threads working.

• Refactors

  • Replaced mesh-storage-uri.ts with studio-storage-uri.ts in packages/harness/src/decopilot (toStudioStorageUri, parseStudioStorageKey, studioStorageRegex).
  • Updated mesh app re-export to @decocms/harness/decopilot/studio-storage-uri and updated all call sites (file materializer, built-in tools, cluster research, web UI, e2e).
  • Added unit tests to verify legacy mesh-storage:// parsing and regex coverage; updated e2e to expect studio-storage:.

• Migration

  • No action needed. Existing mesh-storage:// URIs continue to resolve; new writes use studio-storage://.

^{Written for commit 6e0eca5. Summary will update on new commits.}