Platform polish: bulk invite, file requirements, filtering redesign, UX fixes

- F1: Set seed jury/mentors/observers to NONE status (not invited), remove passwords
- F2: Add bulk invite UI with checkbox selection and floating toolbar
- F3: Add getProjectRequirements backend query + requirement slots on project detail
- F4: Redesign filtering section: AI criteria textarea, "What AI sees" card,
  field-aware eligibility rules with human-readable previews
- F5: Auto-redirect to pipeline detail when only one pipeline exists
- F6: Make project names clickable in pipeline intake panel
- F7: Fix pipeline creation error: edition context fallback + .min(1) validation
- Pipeline wizard sections: add isActive locking, info tooltips, UX improvements

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

src/server/routers/pipeline.ts

@@ -316,7 +316,7 @@ export const pipelineRouter = router({
   createStructure: adminProcedure
     .input(
       z.object({
-        programId: z.string(),
+        programId: z.string().min(1, 'Program ID is required'),
         name: z.string().min(1).max(255),
         slug: z.string().min(1).max(100).regex(/^[a-z0-9-]+$/),
         settingsJson: z.record(z.unknown()).optional(),