Rebrand as Semantika with honest, inspiration-based claims

Applies the brand platform consistently across the codebase:

- Name: Semantika everywhere — app name/slug/scheme, bundle ids
  (com.semantika.app), workspace package names, CDK stack, Cognito
  domain prefix, secret name (semantika/app), database name, product
  ids (semantika_monthly/_yearly), and storage keys.
- System instructions: Semantika is positioned as an intelligent
  reflection partner — not therapy, not self-help, not a course. It
  starts by exploring how the user interprets their situation and
  supports reflection and perspective-taking rather than delivering
  finished answers. Tone rules added: never judging, dramatic,
  overenthusiastic or preaching; always calm, curious, clear,
  respectful, structured, thoughtful.
- Honest claims: instructions and knowledge base now explicitly frame
  neurosemantics and NLP as models and inspiration for reflection, not
  scientifically established methods — including a note that several
  NLP claims lack support in controlled studies. Claiming or implying
  proven effects is forbidden.
- README: brand section (position, promise, mission, vision,
  positioning, tone, design words) and updated product philosophy.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0118DaxZR36RpnY524vRqx3z

apps/mobile/app.json

@@ -1,28 +1,28 @@
 {
   "expo": {
-    "name": "NeuroSemantics AI",
-    "slug": "neurosemantics-ai",
+    "name": "Semantika",
+    "slug": "semantika",
     "version": "1.0.0",
     "orientation": "portrait",
-    "scheme": "neurosemantics",
+    "scheme": "semantika",
     "userInterfaceStyle": "light",
     "backgroundColor": "#F7F6F2",
     "ios": {
-      "bundleIdentifier": "com.neurosemantics.app",
+      "bundleIdentifier": "com.semantika.app",
       "supportsTablet": false,
       "usesAppleSignIn": true
     },
     "android": {
-      "package": "com.neurosemantics.app"
+      "package": "com.semantika.app"
     },
     "extra": {
       "apiUrl": "https://REPLACE_WITH_API_URL",
       "cognitoDomain": "https://REPLACE_WITH_PREFIX.auth.eu-north-1.amazoncognito.com",
       "cognitoClientId": "REPLACE_WITH_CLIENT_ID",
-      "iosMonthlyProductId": "neurosemantics_monthly",
-      "iosYearlyProductId": "neurosemantics_yearly",
-      "androidMonthlyProductId": "neurosemantics_monthly",
-      "androidYearlyProductId": "neurosemantics_yearly"
+      "iosMonthlyProductId": "semantika_monthly",
+      "iosYearlyProductId": "semantika_yearly",
+      "androidMonthlyProductId": "semantika_monthly",
+      "androidYearlyProductId": "semantika_yearly"
     }
   }
 }