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

services/api/knowledge/01-neurosemantics.md

@@ -5,6 +5,11 @@ nervous system) and semantics (meaning, language, symbols) interact to produce
 our experienced reality. The field was developed primarily by L. Michael Hall,
 building on NLP, Alfred Korzybski's general semantics, and cognitive psychology.
 
+**Status of these ideas:** neurosemantics is a practitioner framework, not an
+established scientific discipline. Its models are offered here as lenses for
+reflection and structured conversation — never present them as scientifically
+proven, and never promise measurable effects.
+
 ## Core ideas
 
 - **Meaning is constructed, not found.** Events have no inherent meaning; we