update landing journey: 5-stage funnel with Coming Soon badges

Explore → Plan → Finance → Build → Grow, with .grid-5 layout.

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

CHANGELOG.md

@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 ## [Unreleased]
 
+### Changed
+- Landing page journey section: renamed "From Idea to Operating Hall" → "Your Journey", expanded from 4 cards to 5 (Explore → Plan → Finance → Build → Grow) with "Coming Soon" badges on unreleased stages
+- Added `.grid-5` CSS helper for 5-column grid layout
+
 ### Changed
 - **Pico CSS → Tailwind CSS v4** — full design system migration across all templates (except planner, which keeps its own CSS)
   - Standalone Tailwind CLI binary (no Node.js) with `make css-build` / `make css-watch`