fix: build speed, observer AI details, round tracker empty state

- Disable typedRoutes and skip TS in build (run tsc separately) — build
  drops from ~9min to ~36s
- Expand optimizePackageImports for sonner, date-fns, recharts, motion, zod
- Docker: mount .next/cache as build cache for faster rebuilds
- Observer filtering panel: fix AI reasoning extraction (nested under rule ID)
  and show confidence, quality score, spam risk, override reason
- Round User Tracker: show empty state message instead of disappearing when
  selected round has no passed projects yet

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

src/components/dashboard/round-user-tracker.tsx

@@ -57,23 +57,21 @@ export function RoundUserTracker({ editionId }: RoundUserTrackerProps) {
   const { rounds, byCategory } = data
   const effectiveRoundId = data.selectedRoundId
 
-  // Don't render if no rounds or no data
-  if (!effectiveRoundId || rounds.length === 0) return null
+  // Don't render if no rounds at all
+  if (rounds.length === 0) return null
 
   const totalProjects = byCategory.reduce((sum, c) => sum + c.total, 0)
   const totalActivated = byCategory.reduce((sum, c) => sum + c.accountsSet, 0)
   const totalPending = byCategory.reduce((sum, c) => sum + c.accountsNotSet, 0)
 
-  if (totalProjects === 0) return null
-
-  const selectedRound = rounds.find(r => r.id === effectiveRoundId)
+  const selectedRound = effectiveRoundId ? rounds.find(r => r.id === effectiveRoundId) : undefined
 
   const handleSendReminder = async (target: string, opts: { category?: 'STARTUP' | 'BUSINESS_CONCEPT' }) => {
     setSendingTarget(target)
     try {
       await sendReminders.mutateAsync({
         editionId,
-        roundId: effectiveRoundId,
+        roundId: effectiveRoundId!,
         category: opts.category,
       })
     } finally {
@@ -89,13 +87,15 @@ export function RoundUserTracker({ editionId }: RoundUserTrackerProps) {
             <Users className="h-4 w-4 text-brand-blue" />
             Round User Tracker
           </CardTitle>
-          <Badge variant="outline" className="text-xs shrink-0">
-            {totalActivated}/{totalProjects} activated
-          </Badge>
+          {totalProjects > 0 && (
+            <Badge variant="outline" className="text-xs shrink-0">
+              {totalActivated}/{totalProjects} activated
+            </Badge>
+          )}
         </div>
         {/* Round selector */}
         <Select
-          value={effectiveRoundId}
+          value={effectiveRoundId ?? ''}
           onValueChange={(val) => setSelectedRoundId(val)}
         >
           <SelectTrigger className="h-8 text-xs mt-2">
@@ -114,6 +114,15 @@ export function RoundUserTracker({ editionId }: RoundUserTrackerProps) {
         </Select>
       </CardHeader>
       <CardContent className="space-y-4">
+        {totalProjects === 0 ? (
+          <div className="text-center py-4">
+            <Users className="h-8 w-8 text-muted-foreground/30 mx-auto mb-2" />
+            <p className="text-sm text-muted-foreground">
+              No projects have passed {selectedRound?.name ?? 'this round'} yet
+            </p>
+          </div>
+        ) : (
+        <>
         {/* Subtitle showing round context */}
         <p className="text-xs text-muted-foreground">
           Projects that passed <span className="font-medium">{selectedRound?.name ?? 'this round'}</span> — account activation status
@@ -192,6 +201,8 @@ export function RoundUserTracker({ editionId }: RoundUserTrackerProps) {
             )}
           </div>
         </div>
+        </>
+        )}
       </CardContent>
     </Card>
   )