docs: capture todo for vault key blob IPNS separation

[FSM1]

Summary

• Captures a high-priority todo for separating the vault key blob from the root folder IPNS name
• The current v2 blob format conflates rootFolderKey storage with root folder metadata in one IPNS record, causing web root folder publishes to overwrite the key blob with v1 JSON (breaking next login)

Test plan

• Docs-only change (todo file), no code impact

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Added internal planning documentation for an upcoming architectural update to vault initialization and login workflows.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 50bd11a2-058d-43d1-96c5-7567fd74da99

📥 Commits

Reviewing files that changed from the base of the PR and between 6aa4114 and 06c050b.

📒 Files selected for processing (1)

• .planning/todos/pending/2026-03-24-separate-vault-key-blob-from-root-folder-ipns-name.md

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Walkthrough

This pull request adds a planning document that outlines an architectural change to separate vault key blob storage from root folder metadata publication. The design specifies splitting a single IPNS record into two distinct IPNS records with different formats and responsibilities, along with required codebase updates.

Changes

Cohort / File(s)	Summary
Planning Documentation .planning/todos/pending/2026-03-24-separate-vault-key-blob-from-root-folder-ipns-name.md	Adds architectural specification for splitting vault-key IPNS and root-folder IPNS records, detailing updated control flow for initialization, login, and folder mutations across web and desktop clients, along with required codebase changes.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• docs: add todos for IPFS vault key migration and IPNS resolution #176: Addresses the same core design change of moving encrypted rootFolderKey into IPFS/IPNS vault records.
• fix: subfolder navigation after reload with E2E coverage #70: Touches IPNS-based folder metadata fetch and resolution logic that this architectural change will impact.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/add-vault-key-separation-todo

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