[TASK] js.node_modules-lite plan emits .hint only (no trash)

[kirich1409]

Context

Plan returns .hint("Run pnpm prune or wait for 0.2 extended module") — never .trash in 0.1.

Acceptance criteria

• Plan never returns .trash.
• Snapshot test covers the hint text.

Files to touch (estimate)

best-effort estimate; agent refines during implementation

Implementation notes

n/a

Dependencies

• Blocked by [TASK] js.node_modules-lite scanner (FastWalker(package.json)) #83

Safety checklist

See .github/ISSUE_TEMPLATE/task.yml — tick applicable invariants in the issue if any destructive path is touched.

Definition of Done

• Acceptance criteria satisfied and verifiable
• Tests added or updated
• No build / lint / test regressions
• Self-review against research-report invariants
• Code review approved