fix: consent mode v2 compliance + visual enhancements across sections

Google Consent Mode v2: region-specific defaults (granted globally,
denied for EEA/UK), update all 4 consent types on accept/decline,
add url_passthrough and ads_data_redaction for better measurement.

Visual: unified 48px grid texture across all light sections, animated
constellation SVG in Process section, radial glow on Philosophy,
removed broken SVG connector lines and unused imports.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitignore

@@ -31,3 +31,6 @@ public/media/
 
 # superpowers
 .superpowers/
+
+# private credentials
+private/