feat(storage): phase 5 — replace Supabase storage with local filesystem + HMAC evidence serving

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

components/incidents/evidence-gallery.tsx

@@ -1,6 +1,6 @@
 'use client'
 
-import type { EvidenceStage } from '@/lib/supabase/storage'
+import type { EvidenceStage } from '@/lib/storage/evidence'
 
 type EvidenceFile = {
   id: string
@@ -18,12 +18,6 @@ interface Props {
 function isImage(type: string) { return type.startsWith('image/') }
 function isVideo(type: string) { return type.startsWith('video/') }
 
-// Supabase Storage image transform endpoint. Falls back to the original object
-// URL via onError if the project plan has no image transformation.
-function thumbnailUrl(url: string, width = 320): string {
-  if (!url.includes('/storage/v1/object/public/')) return url
-  return `${url.replace('/storage/v1/object/public/', '/storage/v1/render/image/public/')}?width=${width}&quality=60`
-}
 
 export function EvidenceGallery({ files, stage }: Props) {
   const filtered = stage ? files.filter(f => f.stage === stage) : files
@@ -41,14 +35,10 @@ export function EvidenceGallery({ files, stage }: Props) {
         >
           {isImage(file.file_type) ? (
             <img
-              src={thumbnailUrl(file.file_url)}
+              src={file.file_url}
               alt="Evidence"
               loading="lazy"
               className="w-full h-full object-cover"
-              onError={e => {
-                const img = e.currentTarget
-                if (img.src !== file.file_url) img.src = file.file_url
-              }}
             />
           ) : isVideo(file.file_type) ? (
             <div className="w-full h-full flex items-center justify-center text-3xl">🎥</div>