refactor(FN-1288): consolidate GitHub remote parsing in @fusion/core

- Replace dashboard calls to local getCurrentGitHubRepo helpers with getCurrentRepo from @fusion/core
- Update engine scheduler PR-monitor startup paths to use shared core repo resolution
- Remove duplicated remote parsing implementations from dashboard and engine packages
- Mark gap analysis finding 6.3 as resolved after centralizing parsing logic

packages/engine/src/github.ts

@@ -1,37 +0,0 @@
-import { execFileSync } from "node:child_process";
-
-/**
- * Extract owner/repo from a GitHub remote URL or return null if not a GitHub remote.
- */
-export function parseGitHubRemote(remoteUrl: string): { owner: string; repo: string } | null {
-  // Handle HTTPS: https://github.com/owner/repo.git or https://github.com/owner/repo
-  const httpsMatch = remoteUrl.match(/github\.com\/([^\/]+)\/([^\/\.]+)(?:\.git)?$/);
-  if (httpsMatch) {
-    return { owner: httpsMatch[1], repo: httpsMatch[2] };
-  }
-
-  // Handle SSH: git@github.com:owner/repo.git or git@github.com:owner/repo
-  const sshMatch = remoteUrl.match(/github\.com:([^\/]+)\/([^\/\.]+)(?:\.git)?$/);
-  if (sshMatch) {
-    return { owner: sshMatch[1], repo: sshMatch[2] };
-  }
-
-  return null;
-}
-
-/**
- * Get the current GitHub remote owner/repo from the git config.
- */
-export function getCurrentGitHubRepo(cwd: string): { owner: string; repo: string } | null {
-  try {
-    const remoteUrl = execFileSync("git", ["remote", "get-url", "origin"], {
-      cwd,
-      encoding: "utf-8",
-      stdio: ["pipe", "pipe", "ignore"],
-    }).trim();
-
-    return parseGitHubRemote(remoteUrl);
-  } catch {
-    return null;
-  }
-}

packages/engine/src/scheduler.ts

@@ -1,4 +1,4 @@
-import { resolveDependencyOrder, type TaskStore, type Task, type MissionStore, type PrInfo } from "@fusion/core";
+import { getCurrentRepo, resolveDependencyOrder, type TaskStore, type Task, type MissionStore, type PrInfo } from "@fusion/core";
 import { existsSync } from "node:fs";
 import { readFile } from "node:fs/promises";
 import { join } from "node:path";
@@ -6,7 +6,6 @@ import type { AgentSemaphore } from "./concurrency.js";
 import { generateReservedWorktreeName, slugify } from "./worktree-names.js";
 import { schedulerLog } from "./logger.js";
 import { type PrMonitor, type PrComment } from "./pr-monitor.js";
-import { getCurrentGitHubRepo } from "./github.js";
 
 /**
  * Check whether two sets of file scope paths overlap.
@@ -170,7 +169,7 @@ export class Scheduler {
       if (this.options.prMonitor) {
         if (to === "in-review" && task.prInfo) {
           // Start monitoring existing PR
-          const repo = getCurrentGitHubRepo(this.store.getRootDir());
+          const repo = getCurrentRepo(this.store.getRootDir());
           if (repo) {
             this.options.prMonitor.startMonitoring(task.id, repo.owner, repo.repo, task.prInfo);
           }
@@ -263,7 +262,7 @@ export class Scheduler {
         return;
       }
 
-      const repo = getCurrentGitHubRepo(this.store.getRootDir());
+      const repo = getCurrentRepo(this.store.getRootDir());
       if (repo) {
         this.options.prMonitor.startMonitoring(task.id, repo.owner, repo.repo, task.prInfo);
       }