Fix journey cluster defects + UX improvements across 7 clusters

P0 fixes (clean-start + route contracts):
- VexHub: fix migration 002 table name + add repair migration 003
- Gateway: add /console/admin and /api/v1/unknowns routes
- IDP: add platform.idp.admin scope to OAuth client + web config
- Risk: fix URL construction from authority to gateway base
- Unknowns: fix client path from /api/v1/scanner/unknowns to /api/v1/unknowns

P1 fixes (trust + shell integrity):
- Audit: fix module name normalization, add Authority audit source
- Stage: add persistence across web store, API contracts, DB migration 059
- Posture: add per-source error tracking + degradation banner

P2 fixes (adoption + workflow clarity):
- Rename Triage to Findings in navigation + breadcrumbs
- Command palette: show quick actions for plain text queries, fix scan routes
- Scan: add local-mode limitation messaging + queue hints
- Release: add post-seal promotion CTA with pre-filled release ID
- Welcome: rewrite around operator adoption model (Get Started + What Stella Replaces)

UX improvements:
- Status rail: convert to icon-only with color state + tooltips
- Event Stream Monitor: new page at /ops/operations/event-stream
- Sidebar: collapse Operations by default
- User menu: embed theme switcher (Day/Night/System), remove standalone toggle
- Settings: add Profile section with email editing + PUT /api/v1/platform/preferences/email endpoint
- Docs viewer: replace custom parser with ngx-markdown (marked) for proper table/code/blockquote rendering

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/Platform/__Libraries/StellaOps.Platform.Database/EfCore/CompiledModels/UiContextPreferenceEntityType.cs

@@ -62,6 +62,15 @@ namespace StellaOps.Platform.Database.EfCore.CompiledModels
             timeWindow.AddAnnotation("Relational:ColumnName", "time_window");
             timeWindow.AddAnnotation("Relational:DefaultValueSql", "'24h'");
 
+            var stage = runtimeEntityType.AddProperty(
+                "Stage",
+                typeof(string),
+                propertyInfo: typeof(UiContextPreference).GetProperty("Stage",
+                    BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly),
+                fieldInfo: null,
+                nullable: true);
+            stage.AddAnnotation("Relational:ColumnName", "stage");
+
             var updatedAt = runtimeEntityType.AddProperty(
                 "UpdatedAt",
                 typeof(DateTime),

src/Platform/__Libraries/StellaOps.Platform.Database/EfCore/Context/PlatformDbContext.cs

@@ -107,6 +107,9 @@ public partial class PlatformDbContext : DbContext
             entity.Property(e => e.TimeWindow)
                 .HasDefaultValueSql("'24h'")
                 .HasColumnName("time_window");
+            entity.Property(e => e.Stage)
+                .IsRequired(false)
+                .HasColumnName("stage");
             entity.Property(e => e.UpdatedAt)
                 .HasDefaultValueSql("now()")
                 .HasColumnName("updated_at");

src/Platform/__Libraries/StellaOps.Platform.Database/EfCore/Models/UiContextPreference.cs

@@ -14,6 +14,8 @@ public partial class UiContextPreference
 
     public string TimeWindow { get; set; } = null!;
 
+    public string? Stage { get; set; }
+
     public DateTime UpdatedAt { get; set; }
 
     public string UpdatedBy { get; set; } = null!;

src/Platform/__Libraries/StellaOps.Platform.Database/Migrations/Release/059_UiContextPreferencesStage.sql

@@ -0,0 +1,5 @@
+-- Add stage column to ui_context_preferences for persisting the user's
+-- selected deployment stage (dev/staging/production/all) across sessions.
+
+ALTER TABLE platform.ui_context_preferences
+    ADD COLUMN IF NOT EXISTS stage TEXT NULL;