Ports the Editor Composer's $variables to Easy Gen: a "$ Variables" toggle in
the header opens a collapsible name/value editor docked above the prompt bar.
Same project.variables field the Editor writes, so nothing backend-side is new —
movie_editor/server.py already forwards it on every generate and Studio resolves
it dead-last inside refine_v2 (after shortcut expansion AND after the scene
split), which is what makes a $var work inside a shortcut's replacement while a
value containing a comma or trigger word can never move a scene cut.
- easy_store: projectVariables/setProjectVariables (leading $ stripped on store)
- easy_variables.js: rows + Add/Remove, count badge, live hint for undeclared
names and self-referencing loops (cycle detection mirrors resolve_variables)
- rows rebuild only on add/remove/project-change, so typing never loses focus
Co-Authored-By: Claude <noreply@anthropic.com>
