## Summary
Implements and polishes the Platform Ops Runbooks feature (Spec 113) — the operator control plane for safe backfills and data repair from `/system`.
## Changes
### UX Polish (Phase 7 — US4)
- **Filament-native components**: Rewrote `runbooks.blade.php` and `view-run.blade.php` using `<x-filament::section>` instead of raw Tailwind div cards. Cards now render correctly with Filament's built-in borders, shadows and dark mode.
- **System panel theme**: Created `resources/css/filament/system/theme.css` and registered `->viteTheme()` on `SystemPanelProvider`. The system panel previously had no theme CSS registered — Tailwind utility classes weren't compiled for its views, causing the warning icon SVG to expand to full container size.
- **Live scope selector**: Added `->live()` to the scope `Radio` field so "Single tenant" immediately reveals the tenant search dropdown without requiring a Submit first.
### Core Feature (Phases 1–6, previously shipped)
- `/system/ops/runbooks` — runbook catalog, preflight, run with typed confirmation + reason
- `/system/ops/runs` — run history table with status/outcome badges
- `/system/ops/runs/{id}` — run detail view with summary counts, failures, collapsible context
- `FindingsLifecycleBackfillRunbookService` — preflight + execution logic
- AllowedTenantUniverse — scopes tenant picker to non-platform tenants only
- RBAC: `platform.ops.view`, `platform.runbooks.view`, `platform.runbooks.run`, `platform.runbooks.findings.lifecycle_backfill`
- Rate-limited `/system/login` (10/min per IP+username)
- Distinct session cookie for `/system` isolation
## Test Coverage
- 16 tests / 141 assertions — all passing
- Covers: page access, RBAC, preflight, run dispatch, scope selector, run detail, run list
## Checklist
- [x] Filament v5 / Livewire v4 compliant
- [x] Provider registered in `bootstrap/providers.php`
- [x] Destructive actions require confirmation (`->requiresConfirmation()`)
- [x] System panel theme registered (`viteTheme`)
- [x] Pint clean
- [x] Tests pass
Co-authored-by: Ahmed Darrazi <ahmed.darrazi@live.de>
Reviewed-on: #137
