feat: introduce MCP server, cross-platform runtime, and Showcase UI reorganization

- Showcase UI Reorganization:
  * Move web UI dashboard from root directory into apps/showcase_ui/ for cleaner project structure
  * Add 'artemis ui' CLI command (artemis/interfaces/cli/commands/ui.py) and launcher scripts for the interactive showcase console
- Standalone MCP Server & Notifiers (mcp_server/):
  * Implement dedicated MCP server package with mobile automation tools (device_state, inspect_trace, task_manager, task_runner)
  * Add multi-channel notifiers (AgentAPI, Desktop notifications, Webhooks, File output, and Composite routing)
  * Introduce background task runner and trace store for autonomous mobile execution monitoring
- Cross-Platform Runtime & Toolchain Support:
  * Add artemis/platform/ with OS-specific implementations for Linux, macOS (Darwin), and Windows
  * Add artemis/runtime/supervisor.py for resilient process and agent runtime supervision
  * Add artemis/toolchain/ with dependency resolution and SDK descriptors
  * Add cross-platform launcher scripts (start.sh, start.bat) and installer scripts (scripts/install_deps.*)
- Core Enhancements & Diagnostics:
  * Enhance coordinate normalization, OCR API fallback, and perception pipeline
  * Add credential validation (credentials_validator.py) and system diagnostics
  * Update bilingual documentation (README.md, README_CN.md) and architecture diagrams
- Test Suite Expansion:
  * Add integration tests for cloud gateway, remote ADB, and Artemis login
  * Add unit tests covering core diagnostics, platform detection, toolchain, credentials validator, optional OCR, and MCP tools

Makefile

@@ -1,4 +1,18 @@
-.PHONY: help test install setup clean precommit-install precommit lint format typecheck
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+.PHONY: help test install install-deps setup start ui doctor clean precommit-install precommit lint format typecheck
 
 help: ## Show this help message
 	@echo 'Usage: make [target]'
@@ -6,14 +20,27 @@ help: ## Show this help message
 	@echo 'Available targets:'
 	@awk 'BEGIN {FS = ":.*?## "} /^[a-zA-Z_-]+:.*?## / {printf "  %-20s %s\n", $$1, $$2}' $(MAKEFILE_LIST)
 
+start: ## One-click start Artemis Showcase UI and auto-open browser
+	@bash start.sh
+
+ui: ## Launch the unified Showcase UI & Admin Console in browser
+	@uv run artemis ui --open
+
+doctor: ## Run system, device, and toolchain diagnostics
+	@uv run artemis doctor
+
 test: ## Run all tests
 	@echo "🧪 Running all tests..."
 	@uv run pytest -v
 
-install: ## Install dependencies
-	@echo "📦 Installing dependencies..."
+install: ## Install python dependencies via uv
+	@echo "📦 Installing python dependencies..."
 	@uv sync --dev
 
+install-deps: ## One-click install all system dependencies (ADB, FFmpeg, scrcpy, Python, uv)
+	@echo "⚡ Running one-click dependency installer..."
+	@bash scripts/install_deps.sh
+
 setup: ## Setup project (install dependencies + pre-commit hooks)
 	@echo "🚀 Setting up project..."
 	@$(MAKE) install
@@ -47,10 +74,12 @@ precommit: ## Run pre-commit hooks manually on all files
 	@echo "🔍 Running pre-commit checks..."
 	@uv run pre-commit run --all-files
 
-clean: ## Clean up generated files and caches
-	@echo "🧹 Cleaning up..."
-	@rm -rf .pytest_cache
-	@rm -rf .ruff_cache
-	@rm -rf **/__pycache__
+clean: ## Clean up generated files, caches, and traces
+	@echo "🧹 Cleaning up caches and temporary files..."
+	@rm -rf .pytest_cache .ruff_cache .artemis_paused traces scratch .venv apps/showcase_ui/.angular build dist
+	@find . -type d -name "outputs" -exec rm -rf {} + 2>/dev/null || true
+	@find . -type f -name ".artemis_paused" -delete 2>/dev/null || true
+	@find . -type d -name "__pycache__" -exec rm -rf {} + 2>/dev/null || true
 	@find . -type d -name "*.egg-info" -exec rm -rf {} + 2>/dev/null || true
+	@find . -type f -name "*.py[cod]" -delete 2>/dev/null || true
 	@echo "✅ Cleanup complete"