feat: Liquid Glass Phase 4 - vibrancy, module tint, deeper glass penetration

Dashboard widgets, task cards, note items, meal slots, form inputs,
toolbars, and FAB actions now use semi-transparent glass backgrounds
with backdrop-filter blur. Each surface gets a subtle module accent
color tint via color-mix gradient overlay. App background uses a
radial accent gradient for ambient vibrancy.

New tokens: --glass-bg-card, --glass-bg-input, --glass-bg-toolbar,
--glass-tint-strength with full dark mode and accessibility overrides.

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "oikos",
-  "version": "0.11.5",
+  "version": "0.18.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "oikos",
-      "version": "0.11.5",
+      "version": "0.18.0",
       "license": "MIT",
       "dependencies": {
         "bcrypt": "^6.0.0",