fix(automations): widen step-picker dropdown so labels don't wrap

The add-step dropdown was inheriting its width from the "+" button
(≈32px), hitting the base Menu min-w-32 (128px) and wrapping every
multi-word label ("Send Message", "Update Contact Field", etc.).
Set min-w-56 and explicit align="start" so the list anchors to the
button's left edge and each label fits on one line.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/automations/automation-builder.tsx

@@ -651,7 +651,10 @@ function AddButton({ onPick }: { onPick: (t: AutomationStepType) => void }) {
         >
           <Plus className="h-4 w-4" />
         </DropdownMenuTrigger>
-        <DropdownMenuContent className="max-h-80 overflow-y-auto border-slate-700 bg-slate-900">
+        <DropdownMenuContent
+          align="start"
+          className="max-h-80 min-w-56 overflow-y-auto border-slate-700 bg-slate-900"
+        >
           {ADDABLE_STEPS.map((t) => {
             const Icon = STEP_META[t].icon
             return (