docs: migrate all planning docs from React to GoFiber + HTMX

- New ARCHITECTURE_HTMX.md — comprehensive HTMX architecture doc
- ARCHITECTURE.md — updated to point to HTMX version
- UI_COMPONENTS.md — replaced React tree with HTMX partials
- SPRINT_PLAN.md — all sprint tasks updated for HTMX
- BUILD_SYSTEM.md — simplified (no Vite, no npm)
- TIMELINE.md — 3.5 week HTMX timeline
- PROGRESS.md — updated status + HTMX
- AGENTS.md — updated checkpoint with HTMX decision

docs/PROGRESS.md

@@ -2,8 +2,8 @@
 
 > **Purpose**: Enable seamless continuation of development by any agent/LLM across sessions.
 > **How to use**: Read this file first. Find the first unchecked `[ ]` item. That's where you continue.
-> **Last Updated**: 2026-06-29
-> **Status**: Planning complete, implementation not started.
+> **Last Updated**: 2026-07-07
+> **Status**: Documentation complete, Sprint 0 not started.
 
 ---
 
@@ -14,28 +14,33 @@ Hostkeeper V2 is a Termius-like cross-platform SSH/SFTP management GUI applicati
 | Item | Value |
 |------|-------|
 | **Goal** | Build a free, open-source Termius alternative with full feature parity |
-| **Desktop** | GoFiber backend + React/xterm.js UI + Electron wrapper |
+| **Desktop** | GoFiber backend + HTMX + xterm.js + Alpine.js |
 | **Mobile** | Go mobile library + WebView wrapper (Android/iOS) |
 | **Backend language** | Go 1.26 |
 | **HTTP framework** | GoFiber v2 (fasthttp-based) |
-| **Frontend** | React 19, TypeScript, xterm.js, Zustand, Vite |
-| **Desktop wrapper** | Electron (electron-builder) |
+| **Frontend** | HTMX + Alpine.js + xterm.js (minimal JS, server-rendered HTML) |
+| **Styling** | TailwindCSS v4 + custom CSS (Lumina System) |
+| **Desktop wrapper** | Electron (opsional — bisa lewat browser saja) |
 | **Mobile wrapper** | gomobile + WebView |
 | **V1 (existing)** | CLI/TUI SSH/SFTP manager — 105 tests, all passing. Frozen. |
 
+**Keputusan arsitektur**: Migrasi dari React/SPA ke HTMX/server-rendered HTML.
+Lihat [ARCHITECTURE_HTMX.md](ARCHITECTURE_HTMX.md) untuk detail.
+
 ---
 
 ## 2. Current Status Summary
 
 | Item | Status |
 |------|--------|
-| Planning documents | DONE |
-| Sprint 0 — Scaffolding | NOT STARTED |
-| Sprint 1 — Foundation | NOT STARTED |
-| Sprint 2 — Core Features | NOT STARTED |
-| Sprint 3 — SFTP + Polish | NOT STARTED |
-| Sprint 4 — Advanced | NOT STARTED |
-| Sprint 5 — Platform Polish | NOT STARTED |
+| Planning documents (HTMX) | DONE |
+| Sprint 0 — Setup GoFiber + HTMX | NOT STARTED |
+| Sprint 1 — Dashboard + Host List | NOT STARTED |
+| Sprint 2 — Snippets + Keychain | NOT STARTED |
+| Sprint 3 — Settings + Brief | NOT STARTED |
+| Sprint 4 — SFTP Dual-Pane | NOT STARTED |
+| Sprint 5 — Terminal + xterm.js | NOT STARTED |
+| Sprint 6 — Storage Integration | NOT STARTED |
 
 ---