fix(cli): exit cleanly on malformed IPv6 URLs in extension/preset/workflow add (#3369)

* fix(cli): exit cleanly on malformed IPv6 URLs in extension/preset/workflow add

extension add --from, preset add --from, and workflow add <url> parsed
the user-supplied URL with a bare urlparse before their HTTPS/host
validation, so an unclosed IPv6 bracket escaped as a raw ValueError
traceback. Wrap each parse and emit the surrounding validation's clean
error style + typer.Exit(1) instead.

Fixes #3368

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(cli): convert malformed redirect URLs to URLError in shared redirect handler

Parse the redirect target once in _StripAuthOnRedirect.redirect_request
before the validator and stdlib handler run, converting ValueError into
URLError which every download path already catches. Also escape from_url
in the preset install message so IPv6 brackets don't break Rich markup.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/specify_cli/workflows/_commands.py

@@ -631,7 +631,11 @@ def workflow_add(
         from urllib.parse import urlparse
         from specify_cli.authentication.http import open_url as _open_url
 
-        parsed_src = urlparse(source)
+        try:
+            parsed_src = urlparse(source)
+        except ValueError:
+            console.print(f"[red]Error:[/red] Invalid URL: {_escape_markup(source)}")
+            raise typer.Exit(1)
         src_host = parsed_src.hostname or ""
         src_loopback = src_host == "localhost"
         if not src_loopback: