feat: v2.7.8 — Artifacts hub, clone related repos as extra folders, quieter resume prompt

- Artifacts (/artifacts): claude.ai pages sessions publish (captured from the
  Artifact tool's hook), pinned workspace files, skills and plugins, each
  kept as a snapshot; shared ones appear in a Hub and a skill or plugin
  installs into the viewer's own account (server/lib/artifacts.js,
  /api/artifacts, docs/plans/artifacts/).
- Workspace extra folders: clone one or more related repos beside the
  workspace and add them in one step (POST /api/lanes/:id/sources/clone).
- A pane that ended by itself while tmux kept running is no longer offered
  for resume (tmux.serverStartedAt in reconcileOrphans).
- Changes panel: a folder that is not a git repo opens on Files, and its
  files open from there.
- Plus the parallel sessions' work in this tree: File Explorer button in the
  panel header, user delete, RSA SSH keys, chat/terminal and pet fixes.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

server/index.js

@@ -210,6 +210,7 @@ function createApp() {
   app.use("/api/locks", locksRouter);
   app.use("/api/pets", petsRouter);
   app.use("/api/snapshots", snapshotsRouter);
+  app.use("/api/artifacts", require("./routes/artifacts"));
   app.use("/api/alerts", alertsRouter);
   app.use("/api/budgets", budgetsRouter);
   app.use("/api/query", queryRouter);
@@ -762,7 +763,7 @@ function startBackgroundServices() {
   if (Number.isFinite(HEAL_MS) && HEAL_MS > 0) {
     const { healAllRunIds } = require("./routes/lanes");
     const { reconcileOrphans } = require("./lib/dashboard-runs");
-    const { liveSessions } = require("./lib/tmux");
+    const { liveSessions, serverStartedAt } = require("./lib/tmux");
     const anyRun = require("./db").db.prepare(
       `SELECT EXISTS (SELECT 1 FROM lanes WHERE run_id IS NOT NULL)
            OR EXISTS (SELECT 1 FROM dashboard_runs WHERE status IN ('running', 'spawning')) AS any`
@@ -782,7 +783,8 @@ function startBackgroundServices() {
         healAllRunIds(live);
         // A pane that quit (Ctrl+C, `exit`) ends its run record too; one that
         // died under its agent (killed tmux, crash) is offered for resume.
-        if (reconcileOrphans((id) => live.has(id)) > 0) broadcast("runs_interrupted", {});
+        if (reconcileOrphans((id) => live.has(id), serverStartedAt) > 0)
+          broadcast("runs_interrupted", {});
       } catch (err) {
         console.warn("run heal failed:", err.message);
       }
@@ -841,8 +843,8 @@ function startBackgroundServices() {
   // this process, owns it.
   try {
     const { reconcileOrphans } = require("./lib/dashboard-runs");
-    const { hasSession } = require("./lib/tmux");
-    const reconciled = reconcileOrphans(hasSession);
+    const { hasSession, serverStartedAt } = require("./lib/tmux");
+    const reconciled = reconcileOrphans(hasSession, serverStartedAt);
     if (reconciled > 0) {
       console.log(`[runs] reconciled ${reconciled} orphan run(s) → interrupted/abandoned`);
     }