fix: campaigns page perf and loading UX#357
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…ndex The previous segment query rewrite (PR #352) changed C# structure but not the generated SQL — navigation property Count() inside Select() still produced a correlated subquery per UserProfile row (~30s). This rewrites uploadsByUser to use an explicit Join + GroupBy on the ProcessedImages table, generating a single-pass GROUP BY aggregate that uses the existing IX_ProcessedImages_UserProfileId_IsOriginalUpload index. Frontend: remove full-page "Loading…" replacement for the list view — show the table shell (headers, empty state) immediately so the page feels instant. Also adds IX_MarketingCampaigns_CreatedAt for the ORDER BY in GetCampaignsAsync, and fixes the reviews route missing loadComponent (Angular 19 validation). Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
uploadsByUserfrom navigation-propertyCount()(correlated subquery) to explicitJoin+GroupByonProcessedImages— single-pass aggregate instead of N subqueries (~30s → sub-second)IX_MarketingCampaigns_CreatedAtindex for campaigns listORDER BYreviewsroute missingloadComponent(Angular 19 Router validation)Test plan
/admin/campaigns— table headers and empty state visible immediately, no "Loading…" flash🤖 Generated with Claude Code