Admin write-CRUD, Home Assistant connector config, wiring audit

Three requested phases.

1) Admin section (SDD §8.7) — MudBlazor inline-dialog CRUD, consistent pattern,
   delete guards, snackbar feedback, shared Confirm helper:
   - Energy types: create/edit/delete (blocks delete when meters reference it).
   - Meters: create/edit/delete; recomputes consumption when mode/baseline
     changes (NormalizationService over a fresh factory context, in a tx);
     delete cascades data (consumption+readings are Restrict → removed first).
   - A meter's ingest sources: manage on the meter-detail Sources tab
     (add/edit/delete MQTT/Tasmota/HA sources with typed config).
   - Tariffs: full CRUD (scope/component/value/validity).
   - Cost categories: CRUD + member management (meter or energy-type members).
   - Connectors: ingestion_endpoint CRUD (MQTT broker + Home Assistant);
     secrets referenced by env-var name only, never stored.
   - Settings: read-only effective-config view (settings are env-driven and
     reproducible, so an editable form would change nothing — kept honest).
   PV role is now editable on meters (MeterMeta.SetRole can clear a role).

2) Read Home Assistant — extracted a shared public HaEndpointConfig (was a
   private record in the worker), added HaConnectionTester (powers the connector
   "Test connection": checks base URL + env-resolved token, optionally reads one
   entity). Configuring an HA connector + an HA source on a meter drives the
   existing REST-poll worker end to end. (WebSocket push stays a future
   optimization; REST poll already reads HA.)

3) Wiring/placeholder audit — swept every OnClick/Href: all handlers are real,
   all internal links resolve to real routes, no TODO/stub/placeholder code.
   Fixed one genuine gap: MainLayout had no drawer toggle, so the nav was
   unreachable on narrow screens — added a hamburger button.

Tests: +6 (MeterMeta.SetRole role-removal; HaConnectionTester fail-closed
guard branches with a throwing HttpClientFactory proving no network on bad
config); render test now covers all admin routes. 69 Core + 45 Integration =
114 green. Live-verified in Docker: all admin pages 200, drawer toggle present,
Settings shows real effective config.

Claude-Session: https://claude.ai/code/session_01Lz2RqAsnQhetqWNoCDfexK

src/Infrastructure/Dashboard/MeterDetailService.cs

@@ -72,17 +72,12 @@ public sealed class MeterDetailService(IDbContextFactory<MeterVaultDbContext> co
             .Select(t => new TariffRow(t.ScopeType, t.ScopeId, t.Component, t.Value, t.Unit, t.ValidFrom, t.ValidTo))
             .ToListAsync(cancellationToken).ConfigureAwait(false);
 
-        var sources = meter.Sources
-            .OrderBy(s => s.Priority)
-            .Select(s => new SourceRow(s.SourceType, s.IsEnabled, s.LastSeenAt, s.LastValue, s.LastStatus, s.Config))
-            .ToList();
-
         return new MeterDetailView(
             meter.Id, meter.Name, meter.EnergyType?.DisplayName ?? "—", meter.Mode, meter.Unit,
             meter.Location, meter.SerialNumber, meter.Manufacturer, meter.Model, meter.InitialBaseline, meter.IsActive,
             readingCount, consumptionCount,
             first?.Time, last?.Time, first?.Value, last?.Value,
             totalConsumption, totalGeneration,
-            recentReadings, recentConsumption, events, tariffs, sources);
+            recentReadings, recentConsumption, events, tariffs, meter.Sources.Count);
     }
 }