Fix 'reference to a variable html' error on interview load

[nonprofittechy]

Problem

Since #1095 (1f7b7cb), loading any interview that includes al_visual.yml fails with:

Interview has an error. There was a reference to a variable 'html' that could
not be looked up in the question file (for language 'en') ...

Cause

That PR added:

modules:
  - json
  - html

In docassemble, modules: performs from <module> import *. That pulls in the module's public names (escape, unescape, dumps, ...) but never binds the module name itself. So the html.escape(...) call in the al_menu_items_default_items data from code block had no html in scope, and docassemble tried to resolve it as an interview variable. json.dumps would have failed the same way right after.

Fix

Use imports:, which does import <module> — matching how ql_baseline.yml and al_settings.yml already import humanize and importlib.

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