feat: add GitHub issue comments display and AI validation integration

- Add comments section to issue detail panel with lazy loading
- Fetch comments via GraphQL API with pagination (50 at a time)
- Include comments in AI validation analysis when checkbox enabled
- Pass linked PRs info to AI validation for context
- Add "Work in Progress" badge in validation dialog for open PRs
- Add debug logging for validation requests

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

libs/types/src/index.ts

@@ -87,6 +87,7 @@ export type {
   IssueValidationVerdict,
   IssueValidationConfidence,
   IssueComplexity,
+  LinkedPRInfo,
   IssueValidationInput,
   IssueValidationRequest,
   IssueValidationResult,
@@ -94,6 +95,9 @@ export type {
   IssueValidationErrorResponse,
   IssueValidationEvent,
   StoredValidation,
+  GitHubCommentAuthor,
+  GitHubComment,
+  IssueCommentsResult,
 } from './issue-validation.js';
 
 // Backlog plan types

libs/types/src/issue-validation.ts

@@ -21,6 +21,15 @@ export type IssueValidationConfidence = 'high' | 'medium' | 'low';
  */
 export type IssueComplexity = 'trivial' | 'simple' | 'moderate' | 'complex' | 'very_complex';
 
+/**
+ * Linked PR info for validation
+ */
+export interface LinkedPRInfo {
+  number: number;
+  title: string;
+  state: string;
+}
+
 /**
  * Issue data for validation (without projectPath)
  * Used by UI when calling the validation API
@@ -30,6 +39,10 @@ export interface IssueValidationInput {
   issueTitle: string;
   issueBody: string;
   issueLabels?: string[];
+  /** Comments to include in validation analysis */
+  comments?: GitHubComment[];
+  /** Linked pull requests for this issue */
+  linkedPRs?: LinkedPRInfo[];
 }
 
 /**
@@ -133,3 +146,41 @@ export interface StoredValidation {
   /** ISO timestamp when user viewed this validation (undefined = not yet viewed) */
   viewedAt?: string;
 }
+
+/**
+ * Author of a GitHub comment
+ */
+export interface GitHubCommentAuthor {
+  login: string;
+  avatarUrl?: string;
+}
+
+/**
+ * A comment on a GitHub issue
+ */
+export interface GitHubComment {
+  /** Unique comment ID */
+  id: string;
+  /** Author of the comment */
+  author: GitHubCommentAuthor;
+  /** Comment body (markdown) */
+  body: string;
+  /** ISO timestamp when comment was created */
+  createdAt: string;
+  /** ISO timestamp when comment was last updated */
+  updatedAt?: string;
+}
+
+/**
+ * Result from fetching issue comments
+ */
+export interface IssueCommentsResult {
+  /** List of comments */
+  comments: GitHubComment[];
+  /** Total number of comments on the issue */
+  totalCount: number;
+  /** Whether there are more comments to fetch */
+  hasNextPage: boolean;
+  /** Cursor for pagination (pass to next request) */
+  endCursor?: string;
+}