chore: v2.8.13 — Artifacts reinstall/edit/installs, agent steps in chat, pick a local file to attach, Windows paths as links

- Chat: an Agent step shows its task, status and tool calls and opens its conversation in place; Windows paths (E:\…, C:/…) in replies open as files
- Prompt: attach a file on this computer by path (native picker), clearer too-large messages
- Artifacts: edit title/description and a skill's files (new snapshot), Reinstall, install history, Hub-only rows, skills installed into ~/.claude/skills and ~/.agents/skills
- Files: batch upload of small files in one extract
- AI Tools: npm install falls back to --prefix ~/.local when the global prefix is not writable

server/__tests__/transcript-sender.test.js

@@ -18,7 +18,12 @@ const fs = require("node:fs");
 const TEST_DB = path.join(os.tmpdir(), `transcript-sender-${Date.now()}-${process.pid}.db`);
 process.env.DASHBOARD_DB_PATH = TEST_DB;
 
-const { classifyTranscriptSender, patchCounts, askAnswers } = require("../routes/sessions");
+const {
+  classifyTranscriptSender,
+  patchCounts,
+  askAnswers,
+  agentInfo,
+} = require("../routes/sessions");
 const { db } = require("../db");
 
 after(() => {
@@ -187,3 +192,44 @@ describe("askAnswers — what the user picked or typed for an AskUserQuestion",
     assert.equal(askAnswers("text"), null);
   });
 });
+
+describe("agentInfo — what an Agent call's result says about its subagent", () => {
+  it("reads a foreground agent's id, model, time, tokens and tool calls", () => {
+    const r = {
+      status: "completed",
+      agentId: "a2f215755130779a8",
+      resolvedModel: "claude-opus-5-5",
+      totalDurationMs: 132350,
+      totalTokens: 88007,
+      totalToolUseCount: 31,
+      content: [{ type: "text", text: "report" }],
+    };
+    assert.deepEqual(agentInfo(r), {
+      id: "a2f215755130779a8",
+      model: "claude-opus-5-5",
+      status: "completed",
+      duration_ms: 132350,
+      tokens: 88007,
+      tool_uses: 31,
+    });
+  });
+
+  it("leaves unknown facts null for a background launch", () => {
+    const r = { isAsync: true, status: "async_launched", agentId: "ab12", description: "x" };
+    assert.deepEqual(agentInfo(r), {
+      id: "ab12",
+      model: null,
+      status: "async_launched",
+      duration_ms: null,
+      tokens: null,
+      tool_uses: null,
+    });
+  });
+
+  it("answers null for a result that is no agent, or an id that is no plain name", () => {
+    assert.equal(agentInfo({ stdout: "ok" }), null);
+    assert.equal(agentInfo({ agentId: "../etc" }), null);
+    assert.equal(agentInfo("text"), null);
+    assert.equal(agentInfo(undefined), null);
+  });
+});