[BUG] auto-dream ignores autoMemoryDirectory, writes to default path

Description

Auto-dream writes memory files to the default ~/.claude/projects/<project>/memory/ directory instead of the path configured via autoMemoryDirectory.

Steps to reproduce

1. Enable auto-dream (autoDreamEnabled: true in settings)
2. Set autoMemoryDirectory to a custom path (e.g., cc_auto pointing to a project-local directory)
3. Let auto-dream run (or trigger /dream)
4. Observe that dreamed memory files are saved in ~/.claude/projects/<project>/memory/, not in the custom directory

Expected behavior

Auto-dream should respect autoMemoryDirectory and write memory files to the configured custom path.

Actual behavior

Auto-dream writes to the default memory directory, ignoring the autoMemoryDirectory setting entirely.

Root cause (likely)

Related to #36636 — the system prompt always injects the default memory path regardless of autoMemoryDirectory. The dream agent inherits this hardcoded path and writes there.

Environment

• Claude Code CLI
• macOS
• autoMemoryDirectory configured in project settings
• autoDreamEnabled: true