feat: portal doctor booking, Arabic RTL fix, wallet portal QR (v0.10.0)

backend: public GET /api/portal/:clinic/doctors and /availability, and
thread a chosen provider into portal bookings (conflict check unchanged).

frontend: fix site-wide Arabic RTL — anchor the sidebar right for RTL and
mirror the Switch thumb. Add a Patient Portal section (open/copy/QR) to
Settings → Signing and a "Use my current location" GPS button to the clinic
location editor. New i18n keys across all five locales.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "temetro",
-  "version": "0.9.0",
+  "version": "0.10.0",
   "private": true,
   "devDependencies": {
     "shadcn": "^4.11.0"