Fix advancement targets stripped by Zod, remove redundant save bar

- Add general settings fields (startupAdvanceCount, conceptAdvanceCount,
  notifyOnEntry, notifyOnAdvance) to ALL round config schemas, not just
  FilteringConfig. Zod was stripping them on save for other round types.
- Replace floating save bar with error-only bar since autosave handles
  all config persistence (800ms debounce)

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

src/app/(admin)/admin/rounds/[roundId]/page.tsx

@@ -2006,40 +2006,26 @@ export default function RoundDetailPage() {
         )}
       </Tabs>
 
-      {/* Floating save bar — appears when config has unsaved changes */}
-      {hasUnsavedConfig && (
-        <div className="fixed bottom-0 left-0 right-0 z-50 border-t bg-background/95 backdrop-blur supports-[backdrop-filter]:bg-background/80 shadow-[0_-4px_12px_rgba(0,0,0,0.1)]">
+      {/* Autosave error bar — only shows when save fails */}
+      {autosaveStatus === 'error' && (
+        <div className="fixed bottom-0 left-0 right-0 z-50 border-t bg-red-50 dark:bg-red-950/50 shadow-[0_-4px_12px_rgba(0,0,0,0.1)]">
           <div className="container flex items-center justify-between py-3 px-4 max-w-5xl mx-auto">
-            <div className="flex items-center gap-2 text-sm">
-              <div className="h-2 w-2 rounded-full bg-amber-500 animate-pulse" />
-              <span className="text-muted-foreground">You have unsaved changes</span>
+            <div className="flex items-center gap-2 text-sm text-red-700 dark:text-red-300">
+              <AlertTriangle className="h-4 w-4" />
+              <span>Auto-save failed</span>
             </div>
-            <div className="flex items-center gap-2">
-              {autosaveStatus === 'error' && (
-                <span className="text-xs text-red-500 mr-2">Save failed — try again</span>
+            <Button
+              size="sm"
+              onClick={saveConfig}
+              disabled={updateMutation.isPending}
+              className="bg-[#de0f1e] hover:bg-[#c00d1a] text-white"
+            >
+              {updateMutation.isPending ? (
+                <><Loader2 className="h-3.5 w-3.5 mr-1.5 animate-spin" />Retrying...</>
+              ) : (
+                <><Save className="h-3.5 w-3.5 mr-1.5" />Retry Save</>
               )}
-              <Button
-                size="sm"
-                variant="outline"
-                onClick={() => {
-                  setConfig(serverConfig)
-                }}
-              >
-                Discard
-              </Button>
-              <Button
-                size="sm"
-                onClick={saveConfig}
-                disabled={updateMutation.isPending}
-                className="bg-[#de0f1e] hover:bg-[#c00d1a] text-white"
-              >
-                {updateMutation.isPending ? (
-                  <><Loader2 className="h-3.5 w-3.5 mr-1.5 animate-spin" />Saving...</>
-                ) : (
-                  <><Save className="h-3.5 w-3.5 mr-1.5" />Save Changes</>
-                )}
-              </Button>
-            </div>
+            </Button>
           </div>
         </div>
       )}