release: v0.3.1 — audit fixes for list_tabs IDs, switch_tab prefix matching, download auto-mkdir, session recovery, docs updates

Bug fixes:
- list_tabs: show full 32-char targetIds (was truncated to 8 chars)
- switch_tab: prefix matching fallback for hex prefixes >= 8 chars
- download: auto-create directory with mkdir -p
- ensureAlive: Runtime.evaluate probe to recover from crashed page targets

Docs:
- dispatch_key: clarify DOM-only event behavior
- navigate: warn about Google anti-bot limitation
- network_log: update deprecated promptSnippet
- SKILL.md: document actual daemon API (evaluateJs, pageInfo, session.call)
- SKILL.md: add troubleshooting for sharp/maxDim and Google navigation
- sharp: add to optionalDependencies for screenshot maxDim auto-resize

1 files changed, 9 insertions, 1 deletions

diff --git a/src/domains/files.ts b/src/domains/files.ts
index f0cb6b0..91f8761 100644
--- a/src/domains/files.ts
+++ b/src/domains/files.ts
@@ -1,4 +1,4 @@
-import { access, constants, stat, readFile, writeFile } from "node:fs/promises";
+import { mkdir, access, constants, stat, readFile, writeFile } from "node:fs/promises";
 import { basename } from "node:path";
 import { Type } from "typebox";
 import type { BrowserClient } from "../client";
@@ -136,6 +136,14 @@ export const downloadTool = defineBrowserTool({
   parameters: DownloadArgs,
   async handler(args, { client }): Promise<Result<ToolOk, ToolErr>> {
     try {
+      await mkdir(args.downloadPath, { recursive: true });
+    } catch (e) {
+      return err({
+        kind: "io_error",
+        message: `Cannot create download directory: ${args.downloadPath} (${e instanceof Error ? e.message : String(e)})`,
+      });
+    }
+    try {
       const s = await stat(args.downloadPath);
       if (!s.isDirectory()) {
         return err({ kind: "io_error", message: `Not a directory: ${args.downloadPath}` });