feat: overhaul all 12 sector extensions with full CRUD, validation, and tests

Add shared components (ConfirmDeleteDialog, EditEntryDialog, validation utils),
enhance all 12 extension workspaces with edit/delete dialogs, input validation,
period comparisons, and new analytics features. Fix critical bugs in
ProjectBilling margin calculation and EarningsPerLiter revenue allocation.
Add pure calculation modules with 183 new tests across all extensions.

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

app/api/extensions/[sector]/[slug]/data/route.ts

@@ -24,8 +24,12 @@ export async function GET(
     .eq('user_id', user.id)
     .eq('extension_id', extensionId)
 
+  const prefix = searchParams.get('prefix')
+
   if (key) {
     query = query.eq('key', key)
+  } else if (prefix) {
+    query = query.ilike('key', `${prefix}%`)
   }
 
   const { data, error } = await query