refactor: unify node types into a single PromptTemplate model

- Removed individual node components (SlashCommandNode, FileOperationNode, etc.) and replaced them with a unified PromptTemplateNode.
- Updated flow types and interfaces to reflect the new single node type system.
- Refactored flow execution logic to handle the new unified model, simplifying node execution and context handling.
- Adjusted UI components to support the new PromptTemplateNode, including instruction display and context references.
- Cleaned up legacy code related to removed node types and ensured compatibility with the new structure.

ccw/frontend/src/locales/en/orchestrator.json

@@ -163,70 +163,27 @@
     "deleteNode": "Delete Node",
     "placeholders": {
       "nodeLabel": "Node label",
-      "commandName": "/command-name",
-      "commandArgs": "Command arguments",
-      "timeout": "60000",
-      "path": "/path/to/file",
-      "content": "File content...",
-      "destinationPath": "/path/to/destination",
-      "variableName": "variableName",
-      "condition": "e.g., result.success === true",
-      "trueLabel": "True",
-      "falseLabel": "False",
-      "contextTemplate": "Template with {variable} placeholders",
-      "promptText": "Enter your prompt here..."
+      "instruction": "e.g., Execute /workflow:plan for login feature\nor: Analyze code architecture\nor: Save {{analysis}} to ./output/result.json",
+      "outputName": "e.g., analysis, plan, result"
     },
     "labels": {
       "label": "Label",
-      "command": "Command",
-      "arguments": "Arguments",
-      "executionMode": "Execution Mode",
-      "onError": "On Error",
-      "timeout": "Timeout (ms)",
-      "operation": "Operation",
-      "path": "Path",
-      "content": "Content",
-      "destinationPath": "Destination Path",
-      "outputVariable": "Output Variable",
-      "addToContext": "Add to context",
-      "condition": "Condition",
-      "trueLabel": "True Label",
-      "falseLabel": "False Label",
-      "joinMode": "Join Mode",
-      "failFast": "Fail fast (stop all branches on first error)",
+      "instruction": "Instruction",
+      "outputName": "Output Name",
       "tool": "CLI Tool",
-      "mode": "Mode",
-      "promptType": "Prompt Type",
-      "sourceNodes": "Source Nodes",
-      "contextTemplate": "Context Template",
-      "promptText": "Prompt Text"
+      "mode": "Execution Mode",
+      "contextRefs": "Context References"
     },
     "options": {
-      "modeMainprocess": "Main Process",
-      "modeAsync": "Async",
-      "errorStop": "Stop execution",
-      "errorContinue": "Continue",
-      "errorRetry": "Retry",
-      "operationRead": "Read",
-      "operationWrite": "Write",
-      "operationAppend": "Append",
-      "operationDelete": "Delete",
-      "operationCopy": "Copy",
-      "operationMove": "Move",
-      "joinModeAll": "Wait for all branches",
-      "joinModeAny": "Complete when any branch finishes",
-      "joinModeNone": "No synchronization",
+      "toolNone": "None (auto-select)",
       "toolGemini": "Gemini",
       "toolQwen": "Qwen",
       "toolCodex": "Codex",
-      "modeAnalysis": "Analysis",
-      "modeWrite": "Write",
-      "modeReview": "Review",
-      "promptTypeOrganize": "Organize",
-      "promptTypeRefine": "Refine",
-      "promptTypeSummarize": "Summarize",
-      "promptTypeTransform": "Transform",
-      "promptTypeCustom": "Custom"
+      "toolClaude": "Claude",
+      "modeAnalysis": "Analysis (read-only)",
+      "modeWrite": "Write (modify files)",
+      "modeMainprocess": "Main Process (blocking)",
+      "modeAsync": "Async (non-blocking)"
     }
   }
 }