feat(ui): expand file display name logic for framework routing

Add support for Next.js and other framework conventional filenames (page.tsx, route.ts, views.py, etc.) to show directory context, improving file identification in chat UI file lists.

Author: phodal

core/src/main/kotlin/cc/unitmesh/devti/gui/chat/ui/file/RelatedFileListCellRenderer.kt

@@ -63,21 +63,54 @@ class RelatedFileListCellRenderer(val project: Project) : ListCellRenderer<FileP
 
     /**
      * Constructs a display name for the given file presentation based on the associated virtual file.
+     * 
+     * For file-system routing frameworks where files have conventional names but directories carry semantic meaning:
+     * - Next.js: app/dashboard/page.tsx -> dashboard/page.tsx
+     * - Django: myapp/views.py -> myapp/views.py  
+     * - Nuxt: pages/about/index.vue -> about/index.vue
+     * 
+     * Shows directory context for conventional filenames that appear frequently across projects.
      */
     private fun buildDisplayName(value: FilePresentation): @NlsSafe String {
         val filename = value.virtualFile.name
-        if (filename.startsWith("index.")) {
+        val filenameWithoutExtension = filename.substringBeforeLast('.')
+        
+        // File-system routing and framework convention patterns
+        val routingConventionFiles = setOf(
+            // Next.js App Router
+            "page", "layout", "loading", "error", "not-found", "route", "template", "default",
+            // Traditional index files
+            "index",
+            // Django patterns  
+            "views", "models", "urls", "forms", "admin", "serializers", "tests",
+            // Flask/FastAPI patterns
+            "app", "main", "routes", "models", "schemas",
+            // Vue/Nuxt patterns
+            "middleware", "plugins", "store",
+            // React/Vue component patterns
+            "component", "components", "hook", "hooks", "context", "provider",
+            // General patterns
+            "config", "settings", "constants", "types", "utils", "helpers"
+        )
+        
+        if (filenameWithoutExtension in routingConventionFiles) {
             val parent = value.virtualFile.parent?.name
             if (parent != null) {
-                val grandParent = value.virtualFile.parent?.parent?.name
-                return if (grandParent != null) {
-                    "$grandParent/$parent/$filename"
+                // For index files, show more context as they're especially common
+                if (filenameWithoutExtension == "index") {
+                    val grandParent = value.virtualFile.parent?.parent?.name
+                    return if (grandParent != null) {
+                        "$grandParent/$parent/$filename"
+                    } else {
+                        "$parent/$filename"
+                    }
                 } else {
-                    "$parent/$filename"
+                    // For other conventional files, show parent directory context
+                    return "$parent/$filename"
                 }
             }
         }
 
         return filename
     }
-}
+}