feat: integrate a2ui-core, update Python requirement to 3.14, and refresh dependencies across samples and tools

Author: nan-yu

samples/agent/adk/custom-components-example/pyproject.toml

@@ -17,7 +17,7 @@ name = "a2ui-custom-components-example"
 version = "0.1.0"
 description = "Sample Google ADK-based Contact Lookup agent that uses a2ui extension and is hosted as an A2A server agent."
 readme = "README.md"
-requires-python = ">=3.13"
+requires-python = ">=3.14"
 dependencies = [
     "a2a-sdk>=0.3.0",
     "click>=8.1.8",

samples/agent/adk/gemini_enterprise/agent_engine/pyproject.toml

@@ -17,7 +17,7 @@ name = "a2ui-contactcard-agentengine"
 version = "0.1.0"
 description = "Sample Google ADK-based Contact Lookup agent that uses a2ui extension and is hosted as an A2A agent on Agent Engine."
 readme = "README.md"
-requires-python = ">=3.13"
+requires-python = ">=3.14"
 dependencies = [
     "a2a-sdk==0.3.25",
     "google-cloud-aiplatform[adk,agent-engines]>=1.128.0",

samples/agent/adk/gemini_enterprise/agent_engine/uv.lock

@@ -17,7 +17,7 @@ name = "a2ui-contact-lookup"
 version = "0.1.0"
 description = "Sample Contact Lookup agent that uses a2ui extension and is hosted as an A2A server agent on Cloud Run."
 readme = "README.md"
-requires-python = ">=3.13"
+requires-python = ">=3.14"
 dependencies = [
     "a2a-sdk==0.3.25",
     "google-adk>=1.28.0",

samples/agent/adk/gemini_enterprise/cloud_run/pyproject.toml

@@ -17,7 +17,7 @@ name = "a2ui-mcp-apps-in-a2ui-sample"
 version = "0.1.0"
 description = "Sample MCP App with 2-Way Communication"
 readme = "README.md"
-requires-python = ">=3.10"
+requires-python = ">=3.14"
 dependencies = [
     "a2a-sdk>=0.3.0",
     "google-adk>=1.28.1",

samples/agent/adk/gemini_enterprise/cloud_run/uv.lock

@@ -19,7 +19,7 @@ description = "A reference agent that proxies an MCP app"
 input-modes = ["text"]
 output-modes = ["text"]
 readme = "README.md"
-requires-python = ">=3.12"
+requires-python = ">=3.14"
 dependencies = [
     "a2a-sdk>=0.3.0",
     "click>=8.1.8",

samples/agent/adk/mcp-apps-in-a2ui-sample/pyproject.toml

@@ -17,7 +17,7 @@ name = "orchestrator"
 version = "0.1.0"
 description = "Sample Google ADK-based orchestrator agent that uses a2ui extension with a custom catalog and is hosted as an A2A server agent."
 readme = "README.md"
-requires-python = ">=3.13"
+requires-python = ">=3.14"
 dependencies = [
     "a2a-sdk>=0.3.0",
     "click>=8.1.8",

samples/agent/adk/mcp-apps-in-a2ui-sample/uv.lock

@@ -16,7 +16,7 @@
 name = "personalized-learning-agent"
 version = "0.1.0"
 description = "A2A Agent for generating personalized A2UI learning materials"
-requires-python = ">=3.11"
+requires-python = ">=3.14"
 dependencies = [
     "google-adk>=1.28.1",
     "google-genai>=1.27.0",