dsh-vault v0.8.1

v0.8.1 — Browser import, CSV secrets toggle, content duplicates

• vault_import_browser: import Chrome/Firefox/Edge CSV (name,url,username,password)
• vault_export_csv: includeSecrets toggle (default secret-free) + path param
• Bug fix: vault_search_advanced limit default via validateLimit
• vault_duplicates: content-based grouping (same username+credential)
• UI: footer shows days since last backup

67 tools, 134 tests.