fix: resolve all 69 ESLint warnings across 40 files

- Remove unused imports (Mail, CalendarIcon, Plus, Circle, cn, Link,
  MessageCircle, User, Tag, FolderUp, useEffect, LogOut, GripVertical,
  Check, X, HoverActionsMode, HoverActionsCorner, asn1js, Convert, etc.)
- Prefix unused variables/params with underscore to satisfy no-unused-vars
- Add missing React hook dependencies (exhaustive-deps)
- Wrap handleNavigateUp in useCallback and selectedGroupMembers in useMemo
- Remove unused eslint-disable directives in jmap/client.ts
- Replace as any with typed casts in filter-store and smime-store tests
- Remove dead code (macOk assignment, unused now variable)

components/email/email-context-menu.tsx

@@ -132,7 +132,7 @@ export function EmailContextMenu({
   onEditDraft,
 }: EmailContextMenuProps) {
   const t = useTranslations("context_menu");
-  const tColor = useTranslations("email_viewer.color_tag");
+  const _tColor = useTranslations("email_viewer.color_tag");
   const emailKeywords = useSettingsStore((state) => state.emailKeywords);
   const isUnread = !email.keywords?.$seen;
   const isStarred = email.keywords?.$flagged;

components/email/email-list-item.tsx

@@ -6,7 +6,7 @@ import { formatDate } from "@/lib/utils";
 import { Email } from "@/lib/jmap/types";
 import { cn } from "@/lib/utils";
 import { Avatar } from "@/components/ui/avatar";
-import { Paperclip, Star, Circle, CheckSquare, Square, Tag, Reply, Forward } from "lucide-react";
+import { Paperclip, Star, Circle, CheckSquare, Square, Reply, Forward } from "lucide-react";
 import { useEmailStore } from "@/stores/email-store";
 import { useSettingsStore, KEYWORD_PALETTE } from "@/stores/settings-store";
 import { useAuthStore } from "@/stores/auth-store";

components/email/email-list.tsx

@@ -64,7 +64,7 @@ export function EmailList({
   const { client } = useAuthStore();
   const {
     selectedEmailIds,
-    selectAllEmails,
+    selectAllEmails: _selectAllEmails,
     clearSelection,
     batchMarkAsRead,
     batchDelete,

components/email/email-viewer.tsx

@@ -204,7 +204,7 @@ const getCurrentColor = (keywords: Record<string, boolean> | undefined) => {
 };
 
 // Helper function to format recipients with contextual display
-const formatRecipients = (
+const _formatRecipients = (
   recipients: Array<{ name?: string; email: string }> | undefined,
   currentUserEmail: string | undefined,
   t: (key: string, params?: Record<string, string | number>) => string
@@ -1751,6 +1751,7 @@ export function EmailViewer({
     smimeStore.autoImportSignerCerts,
     smimeStore.keyRecords,
     smimeStore.unlockedDecryptionKeys,
+    smimeStore,
   ]);
 
   // TNEF (winmail.dat) detection and processing
@@ -1928,7 +1929,7 @@ export function EmailViewer({
     if (decryptedCidAttachments.length > 0) {
       const urls: Record<string, string> = {};
 
-      decryptedCidAttachments.forEach((att, index) => {
+      decryptedCidAttachments.forEach((att) => {
         const bytes = getAttachmentContentBytes(att);
         if (!bytes) return;
         const cidValue = att.contentId!.replace(/^<|>$/g, '');
@@ -1985,7 +1986,7 @@ export function EmailViewer({
       cancelled = true;
       objectUrls.forEach(url => URL.revokeObjectURL(url));
     };
-  }, [client, email?.id, smimeDecryptedAttachments]);
+  }, [client, email?.id, smimeDecryptedAttachments, email?.attachments]);
 
   const effectiveAttachments = useMemo<EffectiveAttachment[]>(() => {
     if (smimeDecryptedAttachments.length > 0) {

components/email/thread-conversation-view.tsx

@@ -305,7 +305,7 @@ function EmailCard({
       cancelled = true;
       objectUrls.forEach(url => URL.revokeObjectURL(url));
     };
-  }, [client, email?.id]);
+  }, [client, email?.id, email?.attachments]);
 
   // Sanitize and prepare email HTML content
   const emailContent = useMemo(() => {