Simplify Costco browser header extraction

scrape_costco.py

@@ -225,27 +225,8 @@ def build_headers(auth_headers):
     headers.update(auth_headers)
     return headers
 
-def build_session():
-    retailer_session = load_costco_session()
-    click.echo(
-        "session bootstrap: "
-        f"cookies={bool(retailer_session.cookies)}, "
-        f"authorization={'costco-x-authorization' in retailer_session.headers}, "
-        f"client_id={'costco-x-wcs-clientId' in retailer_session.headers}, "
-        f"client_identifier={'client-identifier' in retailer_session.headers}"
-    )
-    
-    auth = retailer_session.headers.get("costco-x-authorization", "")
-    if auth:
-        click.echo(
-            f"auth prefix ok={auth.startswith('Bearer ')} len={len(auth)} token_prefix={auth[:24]}"
-        )
-    
-    click.echo(
-        "header values: "
-        f"client_id={retailer_session.headers.get('costco-x-wcs-clientId', '')} "
-        f"client_identifier={retailer_session.headers.get('client-identifier', '')}"
-    )
+def build_session(profile_dir=None):
+    retailer_session = load_costco_session(profile_dir=profile_dir)
     session = requests.Session()
     session.cookies.update(retailer_session.cookies)
     session.headers.update(build_headers(retailer_session.headers))
@@ -597,15 +578,38 @@ def write_csv(path, rows, fieldnames):
     type=int,
     help="How many months of receipts to enumerate back from today.",
 )
-def main(outdir, document_type, document_sub_type, window_days, months_back):
+@click.option(
+    "--firefox-profile-dir",
+    default=None,
+    help="Firefox profile directory to use for cookies and session storage.",
+)
+def main(
+    outdir,
+    document_type,
+    document_sub_type,
+    window_days,
+    months_back,
+    firefox_profile_dir,
+):
     outdir = Path(outdir)
-    raw_dir = outdir / "raw"    
+    raw_dir = outdir / "raw"
     try:
-        session = build_session()
+        session = build_session(profile_dir=firefox_profile_dir)
     except Exception as exc:
-        raise click.ClickException(
-            f"failed to load Costco browser session: {exc}"
-        ) from exc
+        if firefox_profile_dir:
+            raise click.ClickException(
+                f"failed to load Costco browser session: {exc}"
+            ) from exc
+        prompted_profile = click.prompt(
+            "Firefox profile dir",
+            type=click.Path(exists=True, file_okay=False, path_type=Path),
+        )
+        try:
+            session = build_session(profile_dir=prompted_profile)
+        except Exception as prompt_exc:
+            raise click.ClickException(
+                f"failed to load Costco browser session: {prompt_exc}"
+            ) from prompt_exc
     start_date, end_date = resolve_date_range(months_back)
 
     summary_payload, request_metadata = fetch_summary_windows(