Sync Local Changes With Server (Practical)

Question

## Problem

Linear is local-first/offline-capable. Given a list of local mutations and a server state, reconcile them: apply, detect conflicts, and produce the merged result.

## Example
```
local ops + server state -> merged state + conflicts
```

## Constraints
- Operations may conflict

## What Linear looks for
Practical reasoning about sync, ordering, and conflict resolution (Linear's sync engine).