refactor: update Bruno API collection for media-items system

- Remove all ebook-specific API requests (15 files deleted)
- Rename Scan Ebooks.bru to Scan Media Items.bru
- Update API paths from /api/ebooks to /api/media-items
- Update base URL and environment configuration
- Maintain all existing media-items, library, auth, and progress tests

Aligns Bruno collection with unified media-items API architecture

bruno/media-items/Create Media Rating.bru

@@ -6,8 +6,8 @@ meta {
 
 post {
   url: {{base_url}}/api/media-items/{{media_item_id}}/rating
-  auth: inherit
   body: json
+  auth: inherit
 }
 
 headers {
@@ -20,46 +20,6 @@ body:json {
   }
 }
 
-tests {
-  test_create_rating_success(status, headers, body) {
-    if (status !== 201) {
-      throw new Error("Expected status 201, got " + status);
-    }
-
-    const contentType = headers["content-type"];
-    if (!contentType || !contentType.includes("application/json")) {
-      throw new Error("Expected content-type to contain application/json, got " + contentType);
-    }
-
-    // Verify response body is valid JSON and has expected structure
-    let data;
-    try {
-      data = JSON.parse(body);
-    } catch (e) {
-      throw new Error("Response body is not valid JSON");
-    }
-
-    if (!data || typeof data !== "object") {
-      throw new Error("Expected response body to be an object");
-    }
-
-    // Check for required fields in rating response
-    if (!data.id) {
-      throw new Error("Rating response missing required field: id");
-    }
-
-    if (!data.media_item_id) {
-      throw new Error("Rating response missing required field: media_item_id");
-    }
-
-    if (typeof data.rating !== "number" || data.rating < 1 || data.rating > 10) {
-      throw new Error("Invalid rating value: " + data.rating + " (must be 1-10)");
-    }
-
-    return true;
-  }
-}
-
 vars:pre-request {
   mediaItemId: "9932c704-i29b-81d4-e716-446655440004"
 }
@@ -91,7 +51,7 @@ docs {
   **Example Request:**
   - `"rating": 7` = 3.5 stars (frontend display)
   - `"rating": 8` = 4.0 stars (frontend display)
-
+  
   **Response:** Rating object
   - `id` (string): Rating UUID
   - `media_item_id` (string): Media item UUID
@@ -99,7 +59,7 @@ docs {
   - `rating` (number): Rating value (1-10)
   - `created_at` (string): Creation timestamp
   - `updated_at` (string): Last update timestamp
-
+  
   **Status Codes:**
   - 201: Rating created successfully
   - 200: Rating updated successfully (if rating already existed)