Add in-app local data management

[itsreverence]

Summary

• add aggregate local storage inventory and category-level deletion controls in Settings
• add a downloadable support report with redacted decision-event metadata
• add typed-confirmation full reset for settings, imports, decision history, and renderer connection preferences
• document privacy and persistence behavior

Safety

• all routes remain protected by the per-launch capability token
• reports use Cache-Control: no-store
• exports omit local paths, credentials, identifiers, names, recommendation text, and imported values
• destructive actions require explicit UI confirmation; full reset also validates an exact server-side confirmation value

Validation

• npm ci
• npm run check
• npm test (117 passed, 2 platform-specific skips)
• npm run build
• git diff --check
• authenticated loopback API smoke
• desktop and mobile browser inspection with no console errors
• Windows desktop:package plus unpacked executable launch smoke
• Impeccable detector: no findings

npm audit --omit=dev --audit-level=high was not completed because this environment requires separate explicit approval before sending private dependency metadata to the npm registry.