docs: update README screenshots and provider list

Refreshed screenshots, removed unused images (6, 7).
Added OpenRouter to cloud provider list.

Author: fewtarius

.images/sam-image-1.png

@@ -145,23 +145,8 @@ Get a glimpse of SAM's native macOS interface in action:
     </td>
     <td width="50%">
       <h3>Flexible AI Provider Selection</h3>
-      <img src=".images/sam-image-7.png"/>
-      <em>Choose from local models (MLX, llama.cpp), cloud providers (OpenAI, Anthropic, DeepSeek), or image generation models</em>
-    </td>
-  </tr>
-</table>
-
-<table>
-  <tr>
-    <td width="50%">
-      <h3>Local Image Generation</h3>
       <img src=".images/sam-image-2.png"/>
-      <em>User asks SAM to generate an image of a cruise ship sailing in the ocean - created locally without any cloud services</em>
-    </td>
-    <td width="50%">
-      <h3>Image Analysis</h3>
-      <img src=".images/sam-image-3.png"/>
-      <em>SAM provides a detailed description of the cruise ship image it just created</em>
+      <em>Choose from local models (MLX, llama.cpp), cloud providers (OpenAI, Anthropic, DeepSeek, OpenRouter), or image generation models</em>
     </td>
   </tr>
 </table>
@@ -170,13 +155,14 @@ Get a glimpse of SAM's native macOS interface in action:
   <tr>
     <td width="50%">
       <h3>Travel Research</h3>
-      <img src=".images/sam-image-4.png"/>
+      <img src=".images/sam-image-3.png"/>
       <em>User asks about restaurants in a town they'll be visiting - SAM helps with travel planning and local recommendations</em>
     </td>
     <td width="50%">
       <h3>Shopping Assistance</h3>
+      <img src=".images/sam-image-4.png"/>
       <img src=".images/sam-image-5.png"/>
-      <em>User inquires about availability and pricing of two items on Amazon - SAM helps with product research</em>
+      <em>User inquires about a needed product - SAM helps with product research</em>
     </td>
   </tr>
 </table>
@@ -231,7 +217,7 @@ Get a glimpse of SAM's native macOS interface in action:
 - Secure API authentication
 
  **Flexible AI Provider Support**
-- **Cloud AI**: OpenAI, Anthropic (Claude), GitHub Copilot, DeepSeek
+- **Cloud AI**: OpenAI, Anthropic (Claude), GitHub Copilot, DeepSeek, OpenRouter
 - **Local Models**: Run AI completely on your Mac with MLX or llama.cpp
 - Switch models mid-conversation
 - Use custom OpenAI-compatible endpoints