feat(chat): Update default model and add default scenario

- Set `Ling-mini-2.0` as the default model for the chat tab.
- Add a new default scenario "Be a simple and happy assistant" to all models to improve user experience.
- Ensure all new text is in English.

config.py

@@ -61,11 +61,50 @@ WORKFLOW_EXECUTE_SYSTEM_PROMPT = "You are a workflow execution assistant. Your g
 # --- Model Specifications ---
 
 CHAT_MODEL_SPECS = {
+    "ling-mini-2.0": {
+        "model_id": "inclusionai/ling-mini-2.0",
+        "display_name": "🦉 Ling-mini-2.0",
+        "description": "A lightweight conversational model optimized for efficient operation on consumer-grade hardware, ideal for mobile or localized deployment scenarios.",
+        "prompt_scenarios": [
+            {
+                "title": "Be a simple and happy assistant",
+                "system_prompt": "You are a simple and happy assistant.",
+                "message_examples": [
+                    "Give a brief self-introduction"
+                ]
+            },
+            {
+                "title": "Efficient Email Assistant",
+                "system_prompt": "You are a professional administrative assistant who excels at writing clear, concise, and professional emails.",
+                "message_examples": [
+                    "Write me a short email reminding the team members of the meeting tomorrow at 10 am.",
+                    "Draft an email to the client to inquire about the project progress.",
+                    "Help me write a polite rejection letter in response to an inappropriate collaboration invitation."
+                ]
+            },
+            {
+                "title": "Text Summarization and Translation",
+                "system_prompt": "You are a language expert who can quickly and accurately perform text summarization and multilingual translation.",
+                "message_examples": [
+                    "Summarize the main content of this news article in no more than three sentences.",
+                    "Translate this English passage into Chinese: 'Gradio is an open-source Python library...'",
+                    "Recommend three sci-fi movies suitable for watching on the weekend."
+                ]
+            }
+        ]
+    },
     "ling-1t": {
         "model_id": "inclusionai/ling-1t",
         "display_name": "🦉 Ling-1T",
         "description": "A trillion-parameter large language model designed for complex natural language understanding and generation tasks that require extreme performance and high fluency.",
         "prompt_scenarios": [
+            {
+                "title": "Be a simple and happy assistant",
+                "system_prompt": "You are a simple and happy assistant.",
+                "message_examples": [
+                    "Give a brief self-introduction"
+                ]
+            },
             {
                 "title": "In-depth Analysis Report Writing",
                 "system_prompt": "You are a senior industry analyst who can write in-depth analysis reports with clear logic, sufficient data, and unique insights.",
@@ -91,6 +130,13 @@ CHAT_MODEL_SPECS = {
         "display_name": "🦉 Ling-flash-2.0",
         "description": "A high-performance billion-parameter model optimized for scenarios requiring high-speed response and complex instruction following.",
         "prompt_scenarios": [
+            {
+                "title": "Be a simple and happy assistant",
+                "system_prompt": "You are a simple and happy assistant.",
+                "message_examples": [
+                    "Give a brief self-introduction"
+                ]
+            },
             {
                 "title": "Technical Document Writing",
                 "system_prompt": "You are a professional technical writer who can clearly and accurately explain complex technical concepts.",
@@ -111,36 +157,18 @@ CHAT_MODEL_SPECS = {
             }
         ]
     },
-    "ling-mini-2.0": {
-        "model_id": "inclusionai/ling-mini-2.0",
-        "display_name": "🦉 Ling-mini-2.0",
-        "description": "A lightweight conversational model optimized for efficient operation on consumer-grade hardware, ideal for mobile or localized deployment scenarios.",
-        "prompt_scenarios": [
-            {
-                "title": "Efficient Email Assistant",
-                "system_prompt": "You are a professional administrative assistant who excels at writing clear, concise, and professional emails.",
-                "message_examples": [
-                    "Write me a short email reminding the team members of the meeting tomorrow at 10 am.",
-                    "Draft an email to the client to inquire about the project progress.",
-                    "Help me write a polite rejection letter in response to an inappropriate collaboration invitation."
-                ]
-            },
-            {
-                "title": "Text Summarization and Translation",
-                "system_prompt": "You are a language expert who can quickly and accurately perform text summarization and multilingual translation.",
-                "message_examples": [
-                    "Summarize the main content of this news article in no more than three sentences.",
-                    "Translate this English passage into Chinese: 'Gradio is an open-source Python library...'",
-                    "Recommend three sci-fi movies suitable for watching on the weekend."
-                ]
-            }
-        ]
-    },
     "ring-1t": {
         "model_id": "inclusionai/ring-1t",
         "display_name": "💍️ Ring-1T",
         "description": "A brand-new trillion-parameter reasoning model with powerful code generation and tool use capabilities.",
         "prompt_scenarios": [
+            {
+                "title": "Be a simple and happy assistant",
+                "system_prompt": "You are a simple and happy assistant.",
+                "message_examples": [
+                    "Give a brief self-introduction"
+                ]
+            },
             {
                 "title": "Python Script Generator",
                 "system_prompt": "You are a Python programming expert who can generate high-quality, executable Python scripts based on requirements.",
@@ -157,6 +185,13 @@ CHAT_MODEL_SPECS = {
         "display_name": "💍️ Ring-flash-2.0",
         "description": "A billion-parameter reasoning model that strikes a good balance between performance and cost, suitable for general-purpose tasks that require step-by-step thinking or code generation.",
         "prompt_scenarios": [
+            {
+                "title": "Be a simple and happy assistant",
+                "system_prompt": "You are a simple and happy assistant.",
+                "message_examples": [
+                    "Give a brief self-introduction"
+                ]
+            },
             {
                 "title": "Travel Planning Expert",
                 "system_prompt": "You are an experienced travel planner who is proficient in travel routes, transportation, and budget planning around the world.",
@@ -182,6 +217,13 @@ CHAT_MODEL_SPECS = {
         "display_name": "💍️ Ring-mini-2.0",
         "description": "A quantized and extremely efficient reasoning model designed for resource-constrained environments with strict speed and efficiency requirements (such as edge computing).",
         "prompt_scenarios": [
+            {
+                "title": "Be a simple and happy assistant",
+                "system_prompt": "You are a simple and happy assistant.",
+                "message_examples": [
+                    "Give a brief self-introduction"
+                ]
+            },
             {
                 "title": "Daily Life Assistant",
                 "system_prompt": "You are a helpful life assistant who can handle various daily requests.",