fix: tech debt batch 1 — TS errors, vulnerabilities, dead code

- Fixed 12 TypeScript errors across analytics.ts, observer-project-detail.tsx, bulk-upload/page.tsx, settings/profile/page.tsx
- npm audit: 8 vulnerabilities resolved (1 critical, 4 high, 3 moderate)
- Deleted 3 dead files: live-control.ts (618 lines), feature-flags.ts, file-type-categories.ts
- Removed typescript.ignoreBuildErrors: true — TS errors now block builds

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

src/lib/feature-flags.ts

@@ -1,49 +0,0 @@
-import { prisma } from '@/lib/prisma'
-
-/**
- * Feature flag keys — used to control progressive rollout of new architecture.
- * Stored as SystemSetting records with category FEATURE_FLAGS.
- */
-export const FEATURE_FLAGS = {
-  /** Use Competition/Round model instead of Pipeline/Track/Stage */
-  USE_COMPETITION_MODEL: 'feature.useCompetitionModel',
-} as const
-
-type FeatureFlagKey = (typeof FEATURE_FLAGS)[keyof typeof FEATURE_FLAGS]
-
-/**
- * Check if a feature flag is enabled (server-side).
- * Returns false if the flag doesn't exist in the database.
- */
-export async function isFeatureEnabled(flag: FeatureFlagKey): Promise<boolean> {
-  try {
-    const setting = await prisma.systemSettings.findUnique({
-      where: { key: flag },
-    })
-    // Default to true for competition model (legacy Pipeline system removed)
-    if (!setting) return flag === FEATURE_FLAGS.USE_COMPETITION_MODEL ? true : false
-    return setting.value === 'true'
-  } catch {
-    return flag === FEATURE_FLAGS.USE_COMPETITION_MODEL ? true : false
-  }
-}
-
-/**
- * Set a feature flag value (server-side, admin only).
- */
-export async function setFeatureFlag(
-  flag: FeatureFlagKey,
-  enabled: boolean,
-): Promise<void> {
-  await prisma.systemSettings.upsert({
-    where: { key: flag },
-    update: { value: String(enabled) },
-    create: {
-      key: flag,
-      value: String(enabled),
-      type: 'BOOLEAN',
-      category: 'FEATURE_FLAGS',
-      description: `Feature flag: ${flag}`,
-    },
-  })
-}

src/lib/file-type-categories.ts

@@ -1,30 +0,0 @@
-export type FileTypeCategory = {
-  id: string
-  label: string
-  mimeTypes: string[]
-  extensions: string[]
-}
-
-export const FILE_TYPE_CATEGORIES: FileTypeCategory[] = [
-  { id: 'pdf', label: 'PDF', mimeTypes: ['application/pdf'], extensions: ['.pdf'] },
-  { id: 'word', label: 'Word', mimeTypes: ['application/msword', 'application/vnd.openxmlformats-officedocument.wordprocessingml.document'], extensions: ['.doc', '.docx'] },
-  { id: 'powerpoint', label: 'PowerPoint', mimeTypes: ['application/vnd.ms-powerpoint', 'application/vnd.openxmlformats-officedocument.presentationml.presentation'], extensions: ['.ppt', '.pptx'] },
-  { id: 'excel', label: 'Excel', mimeTypes: ['application/vnd.ms-excel', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'], extensions: ['.xls', '.xlsx'] },
-  { id: 'images', label: 'Images', mimeTypes: ['image/*'], extensions: ['.jpg', '.jpeg', '.png', '.gif', '.webp'] },
-  { id: 'videos', label: 'Videos', mimeTypes: ['video/*'], extensions: ['.mp4', '.mov', '.avi', '.webm'] },
-]
-
-/** Get active category IDs from a list of mime types */
-export function getActiveCategoriesFromMimeTypes(mimeTypes: string[]): string[] {
-  if (!mimeTypes || !Array.isArray(mimeTypes)) return []
-  return FILE_TYPE_CATEGORIES.filter((cat) =>
-    cat.mimeTypes.some((mime) => mimeTypes.includes(mime))
-  ).map((cat) => cat.id)
-}
-
-/** Convert category IDs to flat mime type array */
-export function categoriesToMimeTypes(categoryIds: string[]): string[] {
-  return FILE_TYPE_CATEGORIES.filter((cat) => categoryIds.includes(cat.id)).flatMap(
-    (cat) => cat.mimeTypes
-  )
-}