Fix agent replies targeting thread root instead of mention post

[Copilot]

The agent was replying to the root post of conversation threads instead of the specific post where it was mentioned, breaking conversation threading.

Changes

• GrokService.analyzeAndDecide(): Added mentionPostId parameter to accept the ID of the post containing the mention
• Line 65 in grok.ts: Changed from thread.root_post.id to mentionPostId when calling parseGrokResponse()
• Simulation mode: Updated to use mentionPostId for both reply and analyze actions
• Call sites: Updated agent.ts and examples.ts to pass mention.post.id as third argument

Example

// Before - replies went to thread root
const analysis = await this.grokService.analyzeAndDecide(
  mention.post.text,
  thread
);

// After - replies target the specific mention
const analysis = await this.grokService.analyzeAndDecide(
  mention.post.text,
  thread,
  mention.post.id  // ID of post where agent was mentioned
);

The action.target_post_id now correctly references the mention post, ensuring xClient.postReply() creates proper reply chains.

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[Copilot]

Pull request overview

This PR fixes a critical bug where the agent was replying to the root post of conversation threads instead of the specific post where it was mentioned, breaking proper conversation threading in X/Twitter.

Changes:

• Added mentionPostId parameter to GrokService.analyzeAndDecide() method to track the specific mention post
• Updated all call sites to pass mention.post.id as the third argument
• Modified both simulation and production code paths to use the mention post ID for setting target_post_id

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
src/services/grok.ts	Added mentionPostId parameter to analyzeAndDecide() and simulateAnalysis() methods; updated to pass this ID to parseGrokResponse() and use it in simulation mode for both reply and analyze actions
src/services/agent.ts	Updated call to analyzeAndDecide() to pass mention.post.id as the third argument
src/examples.ts	Updated both example functions (example1 and example5) to pass mention.post.id as the third argument to analyzeAndDecide()

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