Simplify example prompts in docs

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: chengzeyi

README.md

@@ -33,7 +33,7 @@ import wavespeed
 
 output = wavespeed.run(
     "wavespeed-ai/z-image/turbo",
-    input={"prompt": "A cat holds a sign that says 'Hello World'"},
+    input={"prompt": "Cat"},
 )
 
 print(output["outputs"][0])  # Output URL
@@ -53,15 +53,15 @@ Or pass it directly:
 from wavespeed import Client
 
 client = Client(api_key="your-api-key")
-output = client.run("wavespeed-ai/z-image/turbo", input={"prompt": "A cat holds a sign that says 'Hello World'"})
+output = client.run("wavespeed-ai/z-image/turbo", input={"prompt": "Cat"})
 ```
 
 ### Options
 
 ```python
 output = wavespeed.run(
     "wavespeed-ai/z-image/turbo",
-    input={"prompt": "A cat holds a sign that says 'Hello World'"},
+    input={"prompt": "Cat"},
     timeout=36000.0     # Max wait time in seconds (default: 36000.0)
     poll_interval=1.0,  # Status check interval (default: 1.0)
 )

src/wavespeed/api/client.py

@@ -19,7 +19,7 @@ class Client:
 
     Example:
         client = Client(api_key="your-api-key")
-        output = client.run("wavespeed-ai/z-image/turbo", input={"prompt": "Hello"})
+        output = client.run("wavespeed-ai/z-image/turbo", input={"prompt": "Cat"})
     """
 
     def __init__(