Add one-click extension .zip download button in the Space UI

Zip the bundled extension/ folder at startup (top-level extension/ dir, ready to "Load
unpacked") and expose it via a gr.DownloadButton in the YouTube-access panel; allow the
temp dir in launch() so Gradio can serve it.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

README.md

@@ -71,11 +71,13 @@ Paste the values into the app's **"YouTube access — cookies / proxy"** panel:
 ### Easiest: the PO Token Grabber extension (one click)
 
 This repo ships a tiny Chrome/Edge extension in [`extension/`](extension/) that reads the
-PO token + visitor data for you. Download that folder, load it unpacked
-(`chrome://extensions` → Developer mode → Load unpacked), open a YouTube video and press
-play, then click the extension **while on the YouTube tab** to capture the values. Open
-this Space in another tab and hit **⤵ Fill the Space tab** to inject them straight into
-the fields below (or use the Copy buttons and paste). See
+PO token + visitor data for you. Grab it with the **⬇️ Download the PO Token Grabber
+extension (.zip)** button in the app's *YouTube access* panel (or from
+[`extension/`](extension/)), unzip it, and load it unpacked (`chrome://extensions` →
+Developer mode → Load unpacked). Open a YouTube video and press play, then click the
+extension **while on the YouTube tab** to capture the values. Open this Space in another
+tab and hit **⤵ Fill the Space tab** to inject them straight into the fields below (or use
+the Copy buttons and paste). See
 [`extension/README.md`](extension/README.md). (It's unpublished/sideloaded and may need
 updates when YouTube changes; the manual steps below always work as a fallback.)
 

app.py

@@ -26,6 +26,25 @@ from pipeline import (
     tutorial as tutorial_mod,
 )
 
+APP_DIR = os.path.dirname(os.path.abspath(__file__))
+EXTENSION_DIR = os.path.join(APP_DIR, "extension")
+
+
+def _build_extension_zip() -> str | None:
+    """Zip the bundled browser extension for one-click download; return the .zip path.
+
+    Produces an archive whose top-level folder is ``extension/`` so it unzips to a
+    ready-to-"Load unpacked" directory. Returns None if the folder isn't present.
+    """
+    if not os.path.isdir(EXTENSION_DIR):
+        return None
+    out_base = os.path.join(tempfile.gettempdir(), "tutorialmaker-extension")
+    try:
+        return shutil.make_archive(out_base, "zip", root_dir=APP_DIR, base_dir="extension")
+    except Exception:
+        return None
+
+
 LLM_CHOICES = [
     "deepseek-ai/DeepSeek-V3",
     "meta-llama/Llama-3.3-70B-Instruct",
@@ -291,6 +310,11 @@ def build_ui():
                 "- An operator can instead set Space secrets `YT_COOKIES` / `YT_PROXY` / "
                 "`YT_POT` / `YT_VISITOR_DATA` as shared defaults."
             )
+            _ext_zip = _build_extension_zip()
+            if _ext_zip:
+                gr.DownloadButton(
+                    "⬇️ Download the PO Token Grabber extension (.zip)",
+                    value=_ext_zip, size="sm")
             cookies_text = gr.Textbox(
                 label="YouTube cookies (cookies.txt contents or base64)", lines=4,
                 placeholder="# Netscape HTTP Cookie File …  (or a base64 blob)")
@@ -350,4 +374,4 @@ def build_ui():
 
 
 if __name__ == "__main__":
-    build_ui().queue().launch()
+    build_ui().queue().launch(allowed_paths=[tempfile.gettempdir()])