Remove remaining context-header eyebrow prefixes (breadcrumbs provide context)

Remove eyebrow= attributes from app-context-header on 7 pages:
- Dead-Letter Queue: "Ops / Execution"
- Offline Kit: "Ops / Feeds & Airgap"
- Pack Registry: "Ops / Execution"
- Registry Admin: "Setup / Integrations"
- Reachability: "Security / Reachability"
- Watchlist: "Trust & Signing"
- Run Graph Replay: "Releases / Runs"

The breadcrumb navigation already communicates the parent context path.
Eyebrow prefixes duplicated this information and added visual noise.

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

src/Web/StellaOps.Web/src/app/features/deadletter/deadletter-dashboard.component.ts

@@ -23,7 +23,6 @@ import { ContextHeaderComponent } from '../../shared/ui/context-header/context-h
     template: `
     <div class="deadletter-dashboard">
       <app-context-header
-        eyebrow="Ops / Execution"
         title="Dead-Letter Queue Management"
         subtitle="Failed job recovery and diagnostics"
         testId="deadletter-dashboard-header"

src/Web/StellaOps.Web/src/app/features/offline-kit/offline-kit.component.ts

@@ -29,7 +29,6 @@ const PAGE_TABS: readonly StellaPageTab[] = [
     template: `
     <div class="offline-kit-layout">
       <app-context-header
-        eyebrow="Ops / Feeds & Airgap"
         title="Offline Kit Management"
         subtitle="Manage offline bundles, verify audit packages, and configure air-gap operation"
         [chips]="[isOffline() ? 'Offline' : 'Online']"

src/Web/StellaOps.Web/src/app/features/pack-registry/pack-registry-browser.component.ts

@@ -19,7 +19,6 @@ import { ContextHeaderComponent } from '../../shared/ui/context-header/context-h
   template: `
     <section class="pack-registry-page">
       <app-context-header
-        eyebrow="Ops / Execution"
         title="Pack Registry Browser"
         subtitle="Browse TaskRunner packs, inspect DSSE signature state, and run compatibility-checked installs and upgrades."
         testId="pack-registry-header"

src/Web/StellaOps.Web/src/app/features/reachability/reachability-center.component.html

@@ -1,6 +1,5 @@
 <section class="reachability-shell" data-testid="reachability-page">
   <app-context-header
-    eyebrow="Security / Reachability"
     title="Reachability"
     subtitle="Coverage, witnesses, proof-of-exposure artifacts, and sensor gaps stay in one investigation shell."
     [backLabel]="returnTo() ? 'Return to ' + returnToLabel() : null"

src/Web/StellaOps.Web/src/app/features/registry-admin/registry-admin.component.ts

@@ -32,7 +32,6 @@ type TabType = 'plans' | 'audit';
     template: `
     <div class="registry-admin">
       <app-context-header
-        eyebrow="Setup / Integrations"
         title="Registry Token Service"
         subtitle="Manage access plans, repository scopes, and allowlists"
         [chips]="headerChips()"

src/Web/StellaOps.Web/src/app/features/watchlist/watchlist-page.component.html

@@ -1,6 +1,5 @@
 <div class="watchlist-page" data-testid="watchlist-page">
   <app-context-header
-    eyebrow="Trust &amp; Signing"
     title="Identity Watchlist"
     subtitle="Monitor signer identities, triage watchlist alerts, and tune dedup or routing controls from the trust shell."
     [contextNote]="currentModeLabel()"

src/Web/StellaOps.Web/src/app/features/workflow-visualization/run-graph-replay-page.component.html

@@ -1,6 +1,5 @@
 <section class="run-workspace" data-testid="run-graph-replay-page">
   <app-context-header
-    eyebrow="Releases / Runs"
     [title]="context()?.detail?.releaseName || 'Release Run'"
     [subtitle]="'Runtime graphing, replay, and evidence for ' + runId()"
     [chips]="headerChips()"