Address PR #1211 code review feedback

1. ServerCard: import ConnectionStatus and ServerType from core instead
   of inline union types
2. ResourcePreviewPanel: move ContentBlock import to top of file
3. ContentViewer: remove dead annotation mimeType check in isJsonText
4. ProgressDisplay: use Pick to exclude progressToken from params type;
   remove fake tokens from callers and stories
5. AnnotationBadge: restore human-readable priority labels (high/medium/low)
   and remove unused --inspector-annotation-* CSS vars from App.css
6. MessageBubble: add fallback rendering for resource, resource_link,
   tool_use, and tool_result content block types
7. TaskControls: import TaskStatus directly from SDK instead of via TaskCard

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

clients/web/src/components/elements/ContentViewer/ContentViewer.tsx

@@ -17,16 +17,6 @@ function formatJson(content: string): string {
 
 function isJsonText(block: ContentBlock): boolean {
   if (block.type !== "text") return false;
-  if (
-    "annotations" in block &&
-    block.annotations &&
-    "mimeType" in block.annotations
-  ) {
-    return (
-      (block.annotations as Record<string, unknown>).mimeType ===
-      "application/json"
-    );
-  }
   const trimmed = block.text.trimStart();
   return trimmed.startsWith("{") || trimmed.startsWith("[");
 }