fix(wiki): check directory before file lookup to prevent raw redirect

Directory paths were being found by wikiEntryByName as non-.md entries,
triggering a redirect to /wiki/raw/. Now checks for directories first
and handles index file lookup before the file/raw detection.

routers/web/repo/wiki.go

@@ -254,38 +254,39 @@ func renderViewPage(ctx *context.Context) (*git.Repository, *git.TreeEntry) {
 	wikiTree := buildWikiTree(commit)
 	ctx.Data["WikiTree"] = wikiTree
 
+	// Check if path is a directory first (before file lookup)
+	dirEntry, _ := commit.GetTreeEntryByPath(string(pageName))
+	if dirEntry != nil && dirEntry.IsDir() {
+		// Path is a directory - try index files or show folder listing
+		var entry *git.TreeEntry
+		foundIndex := false
+		for _, indexName := range []string{"README", "Home", "index"} {
+			indexPath := wiki_service.WebPath(string(pageName) + "/" + indexName)
+			idxEntry, _, idxNoEntry, _ := wikiEntryByName(ctx, commit, indexPath)
+			if !idxNoEntry && idxEntry != nil {
+				pageName = indexPath
+				entry = idxEntry
+				_, displayName = wiki_service.WebPathToUserTitle(pageName)
+				ctx.Data["PageURL"] = wiki_service.WebPathToURLPath(pageName)
+				ctx.Data["Title"] = displayName
+				foundIndex = true
+				break
+			}
+		}
+		if !foundIndex {
+			ctx.Data["IsWikiFolder"] = true
+			ctx.Data["WikiFolderPath"] = string(pageName)
+			folderEntries := listWikiFolderEntries(commit, string(pageName))
+			ctx.Data["WikiFolderEntries"] = folderEntries
+			return wikiGitRepo, nil
+		}
+		_ = entry // will be used below via pageName lookup
+	}
+
 	// lookup filename in wiki - get gitTree entry , real filename
 	entry, pageFilename, noEntry, isRaw := wikiEntryByName(ctx, commit, pageName)
 	if noEntry {
-		// Check if path is a directory - try index files or show folder listing
-		dirEntry, _ := commit.GetTreeEntryByPath(string(pageName))
-		if dirEntry != nil && dirEntry.IsDir() {
-			// Try index files: README.md, Home.md, index.md
-			for _, indexName := range []string{"README", "Home", "index"} {
-				indexPath := wiki_service.WebPath(string(pageName) + "/" + indexName)
-				idxEntry, _, idxNoEntry, _ := wikiEntryByName(ctx, commit, indexPath)
-				if !idxNoEntry && idxEntry != nil {
-					// Found index file - render it
-					pageName = indexPath
-					entry = idxEntry
-					_, displayName = wiki_service.WebPathToUserTitle(pageName)
-					ctx.Data["PageURL"] = wiki_service.WebPathToURLPath(pageName)
-					ctx.Data["Title"] = displayName
-					noEntry = false
-					break
-				}
-			}
-			if noEntry {
-				// No index file - show folder listing
-				ctx.Data["IsWikiFolder"] = true
-				ctx.Data["WikiFolderPath"] = string(pageName)
-				folderEntries := listWikiFolderEntries(commit, string(pageName))
-				ctx.Data["WikiFolderEntries"] = folderEntries
-				return wikiGitRepo, nil
-			}
-		} else {
-			ctx.Redirect(ctx.Repo.RepoLink + "/wiki/?action=_pages")
-		}
+		ctx.Redirect(ctx.Repo.RepoLink + "/wiki/?action=_pages")
 	}
 	if isRaw {
 		ctx.Redirect(ctx.Repo.RepoLink + "/wiki/raw/" + string(pageName))