Change animation frames (#3627)

## Description
- Changes animation frames to be smaller
- Cleans up file names and popup logic

## tests
- Passes local CI

codex-rs/tui/frames/openai/frame_7.txt

@@ -0,0 +1,17 @@
+                                      
+             aeinopnnppa              
+          poapnipopnnnn aop           
+         o piiioa  aaia oeaop         
+        nniiiinp       ainoiep        
+       aoioiiaienp       e oiin       
+      i niio aonnin       ppiii       
+       anoi  aainini       ooaii      
+      aoeii   npeioia      o iii      
+       eoio poaeineiinnaiinnonii      
+      ipoiineiieoieniinnpnpnnini      
+       n naeoioae  ooooooooaeii       
+       oa eaeaa         popeneo       
+        onppnnna      paipoeoo        
+          naonionniaaapoiope          
+            oiooieiaapanoo            
+