more fixes for issue templates

appview/pages/templates/repo/issues/issue.html

···
             <button type="submit" class="btn mt-2">comment</button>
             <div id="issue-comment"></div>
         </form>
+    {{ else }}
+    <div class="w-full rounded p-6 drop-shadow-sm bg-white">
+      <a href="/login" class="underline">login</a> to join the discussion
+    </div>
     {{ end }}
 
-    {{ $isIssueAuthor := eq .LoggedInUser.Did .Issue.OwnerDid }}
+    {{ $isIssueAuthor := and .LoggedInUser (eq .LoggedInUser.Did .Issue.OwnerDid) }}
     {{ $isRepoCollaborator := .RepoInfo.Roles.IsCollaborator }}
     {{ if or $isIssueAuthor $isRepoCollaborator }}
         {{ $action := "close" }}

appview/state/repo.go

···
 		return
 	}
 
-	if user.Did == f.OwnerDid() {
+	issue, err := db.GetIssue(s.db, f.RepoAt, issueIdInt)
+	if err != nil {
+		log.Println("failed to get issue", err)
+		s.pages.Notice(w, "issue-action", "Failed to close issue. Try again later.")
+		return
+	}
+
+	collaborators, err := f.Collaborators(r.Context(), s)
+	if err != nil {
+		log.Println("failed to fetch repo collaborators: %w", err)
+	}
+	isCollaborator := slices.ContainsFunc(collaborators, func(collab pages.Collaborator) bool {
+		return user.Did == collab.Did
+	})
+	isIssueOwner := user.Did == issue.OwnerDid
+
+	if isCollaborator || isIssueOwner {
 		err := db.ReopenIssue(s.db, f.RepoAt, issueIdInt)
 		if err != nil {
 			log.Println("failed to reopen issue", err)