Summary

• Added comprehensive JSDoc comments to all 12 public methods and the class itself in ConversationManager, including @param types, @returns, and descriptions
• Integrated Winston logger for key operations: conversation load (debug), load/save failures (warn), and clear operations (debug/info)
• Previously, load() and save() had bare catch {} blocks that silently swallowed errors — now they log warnings for easier debugging

What changed

• 1 file modified: src/conversation.js (+70 lines, -3 lines)
• No behavioral changes — only observability and documentation improvements
• Logger is initialized in constructor via getLogger(), which is already available at ConversationManager instantiation time (after createLogger() in bin/kernel.js)

Test plan

• Syntax check passes (node -c src/conversation.js)
• Verified createLogger() is called before new ConversationManager() in startup flow
• No changes to any public API signatures or behavior
• All existing callers (agent.js, bot.js) unaffected

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