fix(frontend): unbreak dashboard — bundle order, IIFE close, dup const

Three merge-fallout bugs that combined to leave the services grid empty
and most UI inert:

1. error-handler.js was bundled into onboarding.js (loaded 3rd), but
   globals.js in core.js (loaded 1st) does `const errorHandler = new
   ErrorHandler()` at top level. ErrorHandler was undefined when core.js
   ran -> ReferenceError -> globals.js stopped, so window.APPS,
   _showTotpOverlay, loadServices, etc. were never set, and init.js
   blew up on every call into core's exports.

   Moved error-handler.js to the start of the core.js bundle so the
   class is on window before any other script touches it.

2. setup-wizard.js also declared `const errorHandler = new ErrorHandler()`
   at top level. Classic scripts share the document's top-level lexical
   environment, so this collided with globals.js's declaration ->
   redeclaration SyntaxError in features.js. Removed setup-wizard.js's
   copy; it picks up the global one.

3. tooltip-definitions.js closed its `(function(window){...})(window);`
   IIFE at line ~171 ("Validation module loaded"), then the TOOLTIP_
   DEFINITIONS array, getter helpers, window.TooltipDefinitions export,
   and final `debug(...)` log all sat at top level — outside the IIFE,
   where `debug` was no longer in scope. Removed the early close and
   added one at EOF so the whole file is in one IIFE.

status/sw.js

@@ -1,4 +1,4 @@
-const CACHE = 'dashcaddy-shell-c6600af35d';
+const CACHE = 'dashcaddy-shell-48970e1876';
 const PRECACHE = [
   '/',
   '/index.html',