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+# admin.derez.ai — UI Reuse Guide
+
+Stripped-down version: **Servers page only**. No Sales, no CRM, no API Keys.
+
+---
+
+## 1. UI Architecture (Single HTML File)
+
+The entire front-end is a **single-page app** in a single `index.html` with:
+
+| File | Role |
+|---|---|
+| `index.html` | Full DOM layout: sidebar, sections, modals (login, confirm) |
+| `styles.css` | All styles: layout, sidebar, cards, tables, badges, modal, toast, server dashboard |
+| `app.js` | State, auth, API helpers, routing, all CRUD for each section |
+
+The pattern is straightforward — you can keep one file per section or keep it monolithic. The CSS and JS are written in vanilla ES6+ with no build step.
+
+---
+
+## 2. Login & Session (Cookie-Based)
+
+### How it works
+
+1. User fills email + password in `#login-modal` (inside `#login-backdrop`).
+2. `doSignIn()` POSTs to the auth endpoint with `{ email, password }`.
+3. The backend returns an object with a `sessionid` field.
+4. The session ID and email are saved in cookies:
+   - `al_session` — the session token
+   - `al_email` — the signed-in email
+
+### On page load
+
+```js
+const _boot = getCookie("al_session");
+if (_boot) {
+  currentSession = _boot;
+  currentEmail = getCookie("al_email") || "";
+  showApp();          // hides login modal, shows sidebar
+  loadData();         // loads your default section data
+} else {
+  showAuth();         // shows login modal
+}
+```
+
+### Cookie helpers (already in `app.js`)
+
+```js
+setCookie(name, value, days)   // SameSite=Strict
+getCookie(name)
+deleteCookie(name)
+```
+
+### API fetch wrapper
+
+```js
+async function apiFetch(url, options = {})
+```
+
+- Automatically attaches `X-Session-Id` header from `currentSession`.
+- On HTTP 401, deletes cookies, clears local state, and reloads the page (back to login).
+
+### Sign out
+
+```js
+function doSignOut()
+```
+
+- Sends a `DELETE` to the auth endpoint with the session ID.
+- Deletes cookies (`al_session`, `al_email`).
+- Clears `localStorage`.
+- Shows the login screen again.
+
+### What you need to change for a new project
+
+| Constant / Variable | Change to |
+|---|---|
+| `const API_BASE` (L2) | Your backend base URL, e.g. `"https://api.yourproject.com/webhook"` |
+| `ROUTES.auth` (L6) | Your login endpoint path, e.g. `"/auth/login"` |
+| Cookie names `al_session` / `al_email` | Rename to avoid conflicts, e.g. `"myapp_session"` |
+| `apiFetch` 401 handler | Customize or keep (auto-redirects to login) |
+
+---
+
+## 3. How Sections Work (Routing)
+
+### Sidebar navigation
+
+Each sidebar item in `index.html`:
+
+```html
+<div class="nav-item" data-section="servers"> ... Servers</div>
+```
+
+The click handler (L175–239 in `app.js`):
+
+1. Reads `el.dataset.section` → e.g. `"servers"`
+2. Toggles `.active` class on the nav item
+3. Toggles `.active` class on `#section-servers`
+4. Sets the page title from a label map
+5. Shows the refresh button
+6. Lazy-loads data if empty
+
+### Corresponding section element
+
+```html
+<div class="section" id="section-servers"> ... </div>
+```
+
+Only one `.section` has `.active` at a time.
+
+---
+
+## 4. Servers Page (Dashboard)
+
+### Data flow
+
+```
+serversLoadData()
+  ├── GET https://n8n.derez.ai/webhook/server          ← seat list (fetched directly, no auth)
+  │     Returns: [{ server: "hostname-01" }, ...]
+  ├── For each server:
+  │     GET apiUrl(ROUTES.servers) + "?server=<name>"   ← full dashboard (authenticated)
+  │     Parses item.text (JSON string) or item directly
+  │     Stores in serversData[]
+  └── serversRenderTabs() + serversRenderDashboard(0)
+```
+
+### Dashboard DOM structure
+
+```
+.section#section-servers
+  ├── .card-header
+  │     ├── Tab bar: .server-tabs / #server-tabs-strip
+  │     └── Buttons (Update All, Harden All — optional)
+  └── .card#server-dashboard
+        ├── Summary card (name, OS, kernel, uptime, status badge)
+        ├── KPI row (CPU, RAM, Disk, Security Score)
+        ├── Performance bars (CPU, RAM, Disk usage)
+        ├── Security checks (SSH, Seccomp, AppArmor, SELinux)
+        ├── Exposed ports
+        ├── Action advice (priority items, upgrades)
+        └── Details: containers, packages, storage, Podman
+```
+
+### Key data shape (`serversData[i]`)
+
+```js
+{
+  server: {
+    name: "hostname-01",
+    os: "Ubuntu 22.04",
+    kernel: "5.15.0-xxx",
+    uptime: "42 days"
+  },
+  summary: {
+    overall_status: "green" | "yellow" | "red"
+  },
+  performance: {
+    cpu_idle_percent: 85.3,
+    ram_percent: 62,
+    ram_gb: 7.8,
+    total_ram_gb: 16
+  },
+  storage: {
+    total_gb: 256,
+    used_gb: 120,
+    percent: 47
+  },
+  kpis: {
+    kpi_19_security_score: 72
+  },
+  security: {
+    ssh_password_auth: false,
+    ssh_root_login: false,
+    seccomp_enabled: true,
+    apparmor_enabled: true,
+    selinux_enabled: false,
+    firewall_exposed_services: ["22", "80", "443"]
+  },
+  action_advice: {
+    priority_actions: [],
+    upgrade_needed: true,
+    ram_upgrade_recommended: false,
+    container_cleanup_needed: false
+  },
+  containers: [ /* … */ ],
+  packages: [ /* … */ ],
+  podman: { /* … */ },
+  seats: { server: "hostname-01", seat: 3 }
+}
+```
+
+### What you need to change for the servers page
+
+| Item | Change to |
+|---|---|
+| Seat list URL (hardcoded `https://n8n.derez.ai/webhook/server` in `serversLoadData`) | Your server list endpoint |
+| `ROUTES.servers` (L10) | Your server dashboard endpoint path |
+| The `item.text` JSON parsing (L918) | Adjust if your API shape differs |
+| Dashboard widget content (render function L983+) | Keep, expand, or trim as needed |
+
+---
+
+## 5. What's Stripped: No Sales, No CRM, No Keys
+
+The following have been **removed** from this consolidated doc — you should delete them from the HTML/CSS/JS when reusing:
+
+### `index.html` — Remove these sidebar nav items
+
+- `<div class="nav-item" data-section="keys">` (L84–100)
+- `<div class="nav-item" data-section="crm">` (L112–129)
+- `<div class="nav-item" data-section="sales">` (L130–147)
+
+Also remove the corresponding `.section` elements:
+
+- `section-keys` (the div near L1060)
+- `section-crm` (the div near L1098)
+- `section-sales` (the div near L1098–1106)
+
+### `app.js` — Remove these functions & state
+
+- State: `keysData` (L22), `crmRecords` (L23), `crmSortKey` (L24), `crmSortDir` (L25)
+- Labels: `keys`, `sales`, `crm` entries from the label map (L192–194)
+- Lazy-loads: the `if (key === "keys")` and `if (key === "crm")` blocks (L233–237)
+- Functions: `keysLoadRecords`, `keysRender`, `keysDelete` (L1303–1398)
+- Functions: `crmLoadRecords`, `crmRender`, `crmClearFilters`, `crmToggleSort`, `crmUpdateDeleteBtn`, `crmToggleAll`, `crmDeleteContact`, `crmDeleteSelected`, `crmSetStageSelected`, `crmOpenEdit`, `crmCloseEdit`, `crmSaveEdit` (L1401–1823)
+
+### `styles.css` — Remove CRM-specific styles
+
+- `.crm-filter-input` and related rules (L824–838+)
+- `.crm-search-row th` (L839–842)
+
+---
+
+## 6. What You Keep (Optional Sections)
+
+If you also want **DNS**, **Instances**, or **Backup** in your new project, their patterns are the same:
+
+| Section | Endpoint | Functions (in `app.js`) | Section ID |
+|---|---|---|---|
+| **DNS** | `ROUTES.dns` | `dnsLoadRecords`, `dnsRender`, `dnsDeleteRecord`, `dnsAddRecord` | `#section-dns` |
+| **Instances** | `ROUTES.instances` | `instancesLoadRecords`, `instancesRender`, `instancesCopySSH`, `instancesDelete`, `instancesOpenEdit`, `instancesCloseEdit`, `instancesSaveEdit` | `#section-instances` |
+| **Backup** | `ROUTES.backup` | `backupLoadRecords`, `backupRender`, `backupDelete` | `#section-backup` |
+
+Each follows the same lazy-load, render, CRUD pattern.
+
+---
+
+## 7. Quick Start for a New Project
+
+1. Copy `index.html`, `styles.css`, `app.js` to your project.
+2. In `app.js`:
+   - Change `API_BASE` to your backend URL.
+   - Change `ROUTES` entries to match your API paths.
+   - Update the cookie names if desired.
+   - Remove `keys`, `crm`, `sales` code (see §5).
+3. In `index.html`:
+   - Remove keys, CRM, and Sales nav items and section elements.
+   - Update the page title in `<head>`.
+   - Update the brand text "derez.ai" in the sidebar.
+4. In `styles.css`:
+   - Remove CRM-specific CSS.
+5. Update the server seat-list URL in `serversLoadData()` to your own endpoint.
+6. Serve from any static server — no build step required.
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