feat: introduce new app routes with modular structure and enhanced features

Added modular app routes including `login`, `dashboard`, `categories`, `trends`, and `upload`. Introduced reusable components such as `ContentList`, `ContentSkeleton`, and `AppSidebar` for improved UI consistency. Enhanced authentication with `AuthProvider` and implemented lazy loading, dynamic layouts, and infinite scrolling for better performance.

frontend/src/services/content.service.ts

@@ -0,0 +1,54 @@
+import api from "@/lib/api";
+import type { Content, PaginatedResponse } from "@/types/content";
+
+export const ContentService = {
+  async getExplore(params: {
+    limit?: number;
+    offset?: number;
+    sort?: "trend" | "recent";
+    tag?: string;
+    category?: string;
+    query?: string;
+  }): Promise<PaginatedResponse<Content>> {
+    const { data } = await api.get<PaginatedResponse<Content>>("/contents/explore", {
+      params,
+    });
+    return data;
+  },
+
+  async getTrends(limit = 10, offset = 0): Promise<PaginatedResponse<Content>> {
+    const { data } = await api.get<PaginatedResponse<Content>>("/contents/trends", {
+      params: { limit, offset },
+    });
+    return data;
+  },
+
+  async getRecent(limit = 10, offset = 0): Promise<PaginatedResponse<Content>> {
+    const { data } = await api.get<PaginatedResponse<Content>>("/contents/recent", {
+      params: { limit, offset },
+    });
+    return data;
+  },
+
+  async getOne(idOrSlug: string): Promise<Content> {
+    const { data } = await api.get<Content>(`/contents/${idOrSlug}`);
+    return data;
+  },
+
+  async incrementViews(id: string): Promise<void> {
+    await api.post(`/contents/${id}/view`);
+  },
+
+  async incrementUsage(id: string): Promise<void> {
+    await api.post(`/contents/${id}/use`);
+  },
+
+  async upload(formData: FormData): Promise<Content> {
+    const { data } = await api.post<Content>("/contents/upload", formData, {
+      headers: {
+        "Content-Type": "multipart/form-data",
+      },
+    });
+    return data;
+  },
+};