feat: add server-level MCP auto-approval for wildcard tool servers

MCP servers configured with empty tools arrays (wildcard) now appear in the
auto-approval pill with a server-level toggle. When toggled, a server-level
approval key (mcp_server:<name>) is added to autoApprovedToolNames. The
sidecar matches this key against PermissionRequestMcp.ServerName to auto-
approve all tools from that server without needing individual tool names.

- Add buildMcpServerApprovalKey/isMcpServerApprovalKey helpers
- Create approval groups for all MCP servers including empty-tools ones
- Add serverApprovalKey to ApprovalToolGroup for server-level toggles
- Update sidecar RequiresToolCallApproval to check server-level keys
- Include server-level keys in listApprovalToolNames for pruning safety
- Add tests for both shared domain and sidecar approval matching

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/renderer/components/ChatPane.tsx

@@ -26,6 +26,8 @@ import { type PatternDefinition, type ReasoningEffort } from '@shared/domain/pat
 import { isScratchpadProject, type ProjectRecord } from '@shared/domain/project';
 import { resolveSessionToolingSelection, type SessionRecord } from '@shared/domain/session';
 import {
+  groupApprovalToolsByProvider,
+  isMcpServerApprovalKey,
   listApprovalToolDefinitions,
   type RuntimeToolDefinition,
   type SessionToolingSelection,
@@ -128,10 +130,19 @@ export function ChatPane({
     ),
     [isApprovalOverridden, session.approvalSettings, pattern.approvalPolicy],
   );
-  const effectiveAutoApprovedCount = useMemo(
-    () => approvalTools.filter((t) => effectiveAutoApproved.has(t.id)).length,
-    [approvalTools, effectiveAutoApproved],
-  );
+  const effectiveAutoApprovedCount = useMemo(() => {
+    const groups = groupApprovalToolsByProvider(approvalTools, toolingSettings);
+    let count = 0;
+    for (const group of groups) {
+      if (group.serverApprovalKey && effectiveAutoApproved.has(group.serverApprovalKey)) {
+        // Server-level approval: count as 1 approved group even with 0 declared tools
+        count += Math.max(group.tools.length, 1);
+      } else {
+        count += group.tools.filter((t) => effectiveAutoApproved.has(t.id)).length;
+      }
+    }
+    return count;
+  }, [approvalTools, effectiveAutoApproved, toolingSettings]);
 
   useEffect(() => {
     transcriptRef.current?.scrollTo({