Problem
show files lists all bucket paths but cannot be filtered. Passing --bucket errors as unknown option.

Repro

cd packages/cli
node ./bin/cli.mjs show files -y           # Lists everything
node ./bin/cli.mjs show files --bucket json -y  # error: unknown option '--bucket'

Why this matters
Large repos need targeted inspection (by bucket/locale/path). Lack of filters makes the command noisy and slower to use.

Proposal
Implement filters (mirror run):

• --bucket <name> repeatable
• --target-locale <code> repeatable
• --file <substr> (already exists on run; mirror here)