Fix pipeline config crashes, settings UX, invite roles, seed expertise tags

- Fix critical crash when clicking Edit on INTAKE stage configs: normalize
  DB fileRequirements shape (type/required → acceptedMimeTypes/isRequired),
  add null guard in getActiveCategoriesFromMimeTypes
- Fix config summary display for all stage types to handle seed data key
  mismatches (votingEnabled→juryVotingEnabled, minAssignmentsPerJuror→
  minLoadPerJuror, deterministic.rules→rules, etc.)
- Add AWARD_MASTER role to invite page dropdown and user router validations
- Restructure settings sidebar: Tags and Webhooks as direct links instead
  of nested tabs, remove redundant Quick Links section
- Seed 38 expertise tags across 7 categories (Marine Science, Technology,
  Policy, Conservation, Business, Education, Engineering)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/admin/pipeline/sections/intake-section.tsx

@@ -262,7 +262,7 @@ export function IntakeSection({ config, onChange, isActive }: IntakeSectionProps
                   </div>
                   <div className="sm:col-span-2">
                     <FileTypePicker
-                      value={req.acceptedMimeTypes}
+                      value={req.acceptedMimeTypes ?? []}
                       onChange={(mimeTypes) =>
                         updateFileReq(index, { acceptedMimeTypes: mimeTypes })
                       }