refactor: Finalize agent template

sources/agents/google_gemini_chat.toml

@@ -1,79 +1,15 @@
 schema_version = 1
 
+extends     = "Google Base Chat"
 name        = "Gemini Chat"
-description = "Google Gemini (generateContent API) — coding chat assistant via the hosted Google AI provider."
+description = "Google Gemini 2.5 Flash (generateContent API) — coding chat with thinking."
 
-provider_instance = "Google AI"
-endpoint          = "/models/gemini-2.5-flash:streamGenerateContent?alt=sse"
-
-model = "gemini-2.5-flash"
-
-role = """
-You are a helpful coding assistant integrated into Qt Creator.
-Answer concisely. When the user shares code, prefer concrete diffs or
-minimal patches over rewriting whole files. Use markdown code blocks
-with language tags so the IDE can render them.
-"""
+endpoint = "/models/gemini-2.5-flash:streamGenerateContent?alt=sse"
+model    = "gemini-2.5-flash"
 
 enable_thinking = true
-enable_tools    = true
-
 tags = ["chat", "gemini", "google", "cloud"]
 
-context = """
-{%- set readme = read_file("${PROJECT_DIR}/README.md") -%}
-{%- if length(readme) > 0 %}
-## Project README.md
-{{ readme }}
-{%- endif %}
-"""
-
-[template]
-message_format = """
-{
-  {%- if existsIn(ctx, "system_prompt") %}
-  "system_instruction": { "parts": [{ "text": {{ tojson(ctx.system_prompt) }} }] },
-  {%- endif %}
-  "contents": [
-    {%- for msg in ctx.history %}
-    {
-      "role": {% if msg.role == "assistant" %}"model"{% else %}"user"{% endif %},
-      "parts": [
-        {%- for b in msg.content_blocks %}
-        {%- if b.type == "text" %}
-        { "text": {{ tojson(b.text) }} }
-        {%- else if b.type == "thinking" %}
-        { "text": {{ tojson(b.thinking) }}, "thought": true, "thoughtSignature": {{ tojson(b.signature) }} }
-        {%- else if b.type == "tool_use" %}
-        { "functionCall": { "name": {{ tojson(b.name) }}, "args": {{ tojson(b.input) }} } }
-        {%- else if b.type == "tool_result" %}
-        { "functionResponse": { "name": {{ tojson(b.name) }}, "response": { "result": {{ tojson(b.content) }} } } }
-        {%- else if b.type == "image" %}
-        {%- if b.is_url %}
-        { "file_data": { "mime_type": {{ tojson(b.media_type) }}, "file_uri": {{ tojson(b.data) }} } }
-        {%- else %}
-        { "inline_data": { "mime_type": {{ tojson(b.media_type) }}, "data": {{ tojson(b.data) }} } }
-        {%- endif %}
-        {%- else %}
-        { "text": "" }
-        {%- endif %}
-        {% if not loop.is_last %},{% endif %}
-        {%- endfor %}
-      ]
-    }{% if not loop.is_last %},{% endif %}
-    {%- endfor %}
-  ]
-}
-"""
-
-[template.sampling.generationConfig]
-maxOutputTokens = 8192
-temperature     = 1
-
-[template.thinking.request_block.generationConfig]
-temperature     = 1
+[body.generationConfig]
 maxOutputTokens = 16000
-
-[template.thinking.request_block.generationConfig.thinkingConfig]
-includeThoughts = true
-thinkingBudget  = 8192
+thinkingConfig  = { includeThoughts = true, thinkingBudget = 8192 }