fix(nostr-feed): Fix TypeScript errors and remove unused imports

- Change SubmissionWithMeta from interface to type intersection
- Fix UseSubmissionsReturn types to use proper Ref/ComputedRef
- Remove unused imports across components and services

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/modules/nostr-feed/components/SubmissionComment.vue

@@ -6,8 +6,7 @@
 
 import { computed, ref } from 'vue'
 import { formatDistanceToNow } from 'date-fns'
-import { ChevronUp, ChevronDown, Reply, Flag, MoreHorizontal, Send, X } from 'lucide-vue-next'
-import VoteControls from './VoteControls.vue'
+import { ChevronUp, ChevronDown, Reply, Flag, MoreHorizontal, Send } from 'lucide-vue-next'
 import type { SubmissionComment as CommentType } from '../types/submission'
 
 interface Props {

src/modules/nostr-feed/components/SubmissionDetail.vue

@@ -5,7 +5,7 @@
  */
 
 import { ref, computed, watch } from 'vue'
-import { useRoute, useRouter } from 'vue-router'
+import { useRouter } from 'vue-router'
 import { formatDistanceToNow } from 'date-fns'
 import {
   ArrowLeft,
@@ -17,9 +17,6 @@ import {
   Image as ImageIcon,
   FileText,
   Loader2,
-  ChevronUp,
-  ChevronDown,
-  Reply,
   Send
 } from 'lucide-vue-next'
 import { Badge } from '@/components/ui/badge'
@@ -31,7 +28,6 @@ import { tryInjectService, SERVICE_TOKENS } from '@/core/di-container'
 import type { ProfileService } from '../services/ProfileService'
 import type { SubmissionService } from '../services/SubmissionService'
 import type {
-  SubmissionWithMeta,
   SubmissionComment as SubmissionCommentType,
   LinkSubmission,
   MediaSubmission,
@@ -245,15 +241,6 @@ function toggleCollapse(commentId: string) {
   collapsedComments.value = new Set(collapsedComments.value)
 }
 
-// Count total replies
-function countReplies(comment: SubmissionCommentType): number {
-  let count = comment.replies?.length || 0
-  comment.replies?.forEach(reply => {
-    count += countReplies(reply)
-  })
-  return count
-}
-
 // Go back
 function goBack() {
   router.back()

src/modules/nostr-feed/components/SubmissionList.vue

@@ -4,7 +4,7 @@
  * Includes sort tabs, submission rows, and loading states
  */
 
-import { ref, computed, onMounted, watch } from 'vue'
+import { computed, onMounted, watch } from 'vue'
 import { Loader2 } from 'lucide-vue-next'
 import SortTabs from './SortTabs.vue'
 import SubmissionRow from './SubmissionRow.vue'

src/modules/nostr-feed/components/SubmissionThumbnail.vue

@@ -5,7 +5,7 @@
  */
 
 import { computed } from 'vue'
-import { Link, FileText, Image, Film, MessageSquare, ExternalLink } from 'lucide-vue-next'
+import { FileText, Image, ExternalLink } from 'lucide-vue-next'
 import type { SubmissionType } from '../types/submission'
 
 interface Props {

src/modules/nostr-feed/composables/useSubmissions.ts

@@ -4,7 +4,7 @@
  * Provides reactive access to the SubmissionService for Reddit-style submissions.
  */
 
-import { computed, ref, onMounted, onUnmounted, watch } from 'vue'
+import { computed, ref, onMounted, onUnmounted, watch, type Ref, type ComputedRef } from 'vue'
 import { tryInjectService, SERVICE_TOKENS } from '@/core/di-container'
 import type { SubmissionService } from '../services/SubmissionService'
 import type { LinkPreviewService } from '../services/LinkPreviewService'
@@ -31,13 +31,13 @@ export interface UseSubmissionsOptions {
 
 export interface UseSubmissionsReturn {
   // State
-  submissions: ReturnType<typeof computed<SubmissionWithMeta[]>>
-  isLoading: ReturnType<typeof computed<boolean>>
-  error: ReturnType<typeof computed<string | null>>
+  submissions: ComputedRef<SubmissionWithMeta[]>
+  isLoading: ComputedRef<boolean>
+  error: ComputedRef<string | null>
 
   // Sorting
-  currentSort: ReturnType<typeof ref<SortType>>
-  currentTimeRange: ReturnType<typeof ref<TimeRange>>
+  currentSort: Ref<SortType>
+  currentTimeRange: Ref<TimeRange>
 
   // Actions
   subscribe: (config?: Partial<SubmissionFeedConfig>) => Promise<void>

src/modules/nostr-feed/services/LinkPreviewService.ts

@@ -5,7 +5,7 @@
  * Used when creating link submissions to embed preview data.
  */
 
-import { ref, reactive } from 'vue'
+import { reactive } from 'vue'
 import { BaseService } from '@/core/base/BaseService'
 import type { LinkPreview } from '../types/submission'
 import { extractDomain } from '../types/submission'

src/modules/nostr-feed/services/SubmissionService.ts

@@ -30,7 +30,6 @@ import {
   type SubmissionComment,
   type LinkPreview,
   type MediaAttachment,
-  type CommunityRef,
   parseCommunityRef,
   formatCommunityRef,
   extractDomain,
@@ -505,7 +504,7 @@ export class SubmissionService extends BaseService {
       id: event.id,
       pubkey: event.pubkey,
       created_at: event.created_at,
-      kind: SUBMISSION_KINDS.SUBMISSION as const,
+      kind: SUBMISSION_KINDS.SUBMISSION,
       tags,
       title,
       communityRef: this.extractCommunityRef(tags),

src/modules/nostr-feed/types/submission.ts

@@ -5,7 +5,6 @@
  * Submissions are kind 1111 events scoped to a community with structured metadata.
  */
 
-import type { Event as NostrEvent } from 'nostr-tools'
 
 // ============================================================================
 // Constants
@@ -193,7 +192,7 @@ export interface SubmissionRanking {
 // ============================================================================
 
 /** Complete submission with all associated data */
-export interface SubmissionWithMeta extends Submission {
+export type SubmissionWithMeta = Submission & {
   /** Vote counts and user state */
   votes: SubmissionVotes
   /** Ranking scores */