Redesign all pages to light theme (Qalby-inspired mobile UI)

Complete UI overhaul replacing dark gold theme with a clean mobile-first
light theme: gradient emerald headers, white card components, light backgrounds,
emerald/amber CTAs, and a new home dashboard with feature grid navigation.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

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+# Dependencies
+node_modules/
+package-lock.json
+.opencode/memories.md
+
+# Build outputs
+dist/
+.next/
+.netlify/
+
+# Environment files
+.env
+.env.local
+.env.production
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Testing
+coverage/
+
+# Secrets (DO NOT COMMIT)
+*.pem
+*.key
+*.crt
+*.p12
+
+# Backup files
+*.bak
+*.sql
+!infrastructure/postgres/init.sql
+
+# Claude (workspace config, not project code)
+.claude/*
+!.claude/commands/
+
+# Netlify
+.functions/