[A-EDev]

Summary

• Profiles card: Linked devices now has a Profiles card with a Sync switch for each local profile.
  • Turning a profile on starts its own link, or joins a profile another device syncs. A joined link is read from its snapshot on the next run.
  • Turning it off stops syncing on this computer, or on every device (a deleted profiles record). Each device keeps its data either way.
  • Profiles only other devices have can be added here as a new local profile.
  • The last syncing profile can't be turned off.
  • Only the running profile can start syncing, because a profile's data goes out only while it runs; any other profile shows Switch to sync instead (flow-sync Feat/adaptive grid columns #65).
• profiles collection: canonical records {"deleted","hlc","link","name"} go in batches with a null link, merged last-writer-wins by HLC (spec/protocol.md, Profiles).
  • A device writes a record for every link it syncs that has none, and a new one when a linked profile is renamed.
  • A deleted record unlinks that profile on every device.
  • The collection gets its own snapshot, and new devices start from it.
• Groups and pairing:
  • Any profile can create, join or restore a group. A new group syncs the profile that created it.
  • welcome.link names Default's link, or the first synced one, whichever profile runs (flow-sync Feat/adaptive grid columns #65).
  • A restored device that finds several synced profiles asks which one Default joins.
• Sync page: Linked devices shows in every profile. Nearby sync (FLOW-SYNC/1) stays Default-only, with updated wording.
• Local edits and resets: they are recorded for sync in any profile that syncs a link, and in Default as before. Resetting a profile that syncs leaves the group first, as Default did.
• Profile changes: deleting a local profile stops its link here.

Related issue

Flow-Tube/Flow#1039 (choose which profiles sync). Android has the matching PR.

Change type

• Bug fix
• Feature
• Refactor or maintenance
• Documentation
• Build, packaging, or CI

Validation

Run on the head of this branch (aba3e37), in its worktree with the shared Cargo target dir:

• pnpm test: 189 files, 1101 tests passed
• pnpm build: passed
• cargo fmt --manifest-path src-tauri/Cargo.toml --all -- --check: clean
• cargo clippy --manifest-path src-tauri/Cargo.toml --all-targets --all-features: finished; every warning it prints is on a line older than this stack (checked with git blame)
• cargo test --manifest-path src-tauri/Cargo.toml --all-targets --all-features: 1113 passed, 0 failed, 9 ignored
• I smoke-tested the affected desktop behavior.

New tests:

• tests/sync2_profile_names.rs: last writer wins; names reach other devices; a deleted link stops syncing there; nothing is sent twice.
• tests/sync2_recovery.rs: a restored device waits for a choice when several links sync.
• tests/sync2_profiles.rs: the garbage collection test now deletes the link through the profiles collection, with its snapshot.
• src/lib/linked/useLinkedProfiles.test.ts: the color a profile added from another device gets.

Screenshots or recordings

Risk and compatibility

• Migrations: none (uses 0036).

• Older builds:

  • They skip profiles batches (unknown collection) and batches of links they don't sync, so a Phase 5 build keeps syncing Default's link.
  • A restored device on a Phase 5 build would still take the first link it finds.

• Store inventory: sync_changes is now per profile, since every profile that syncs records its own edits.

• No new secrets, private data, telemetry, or broad Tauri permissions were introduced.

• User-facing documentation was updated where needed.

• Dependency and lockfile changes are intentional and limited to this PR.

• Breaking changes and upgrade steps are clearly documented.

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