Fix boot sequence alignment, rate limiter memory leak, and docs gaps

- base.js: Fix boot sequence title centering — old formula was off by 1
  char for odd-length app names (PULSE, GANDALF). Remove unused `bar`
  variable. New logic computes left/right padding independently to
  handle both even and odd title lengths correctly.
- node/middleware.js: Prune expired rate-limit entries from Map when
  size exceeds 5000 to prevent unbounded memory growth. Also use
  req.socket?.remoteAddress as fallback for req.ip.
- README.md: Document lt.beep() in the JS API section. Clarify Quick
  Start to distinguish core files from platform-specific helpers.
  Note that tableNav.init() and sortTable.init() require explicit calls.
- aesthetic_diff.md: Correct §8 toast icon format — base.js uses
  bracketed symbols [✓][✗][!][i], not >> prefix as previously stated.

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

README.md

@@ -8,7 +8,7 @@ Unified layout, styling, and JavaScript utilities for all LotusGuild web applica
 
 ## Quick Start
 
-Copy three files into your app's static/public directory:
+**Core files** (needed by every app):
 
 ```
 base.css   → all variables, components, animations, responsive rules
@@ -16,6 +16,15 @@ base.js    → toast, modal, tabs, CSRF, fetch helpers, keyboard shortcuts
 base.html  → full component reference (static demo, not for production)
 ```
 
+**Platform-specific helpers** (one per backend):
+
+```
+php/layout.php          → PHP base layout with CSP nonce + CSRF injection
+python/auth.py          → Flask @require_auth / @require_admin decorators
+python/base.html        → Jinja2 base template with block inheritance
+node/middleware.js      → Express requireAuth, csrfMiddleware, cspNonce, etc.
+```
+
 Then load them in your HTML:
 
 ```html
@@ -386,6 +395,10 @@ lt.toast.error(msg, durationMs?)
 lt.toast.warning(msg, durationMs?)
 lt.toast.info(msg, durationMs?)
 
+/* Audio */
+lt.beep('success' | 'error' | 'info')  // Web Audio API beep; silent-fails if unavailable
+// Note: toasts automatically call lt.beep() — only call directly for non-toast events
+
 /* Modals */
 lt.modal.open('modal-id')
 lt.modal.close('modal-id')
@@ -424,9 +437,9 @@ lt.time.format(isoString)         // locale datetime string
 /* Bytes */
 lt.bytes.format(1234567)          // "1.18 MB"
 
-/* Table utilities */
+/* Table utilities — must be called explicitly (not auto-initialized) */
-lt.tableNav.init('table-id')      // j/k/Enter keyboard navigation
+lt.tableNav.init('table-id')      // j/k/Enter keyboard navigation on <tbody> rows
-lt.sortTable.init('table-id')     // click-to-sort on data-sort-key headers
+lt.sortTable.init('table-id')     // click-to-sort on <th data-sort-key> headers
 
 /* Stats widget filtering */
 lt.statsFilter.init()             // wires data-filter-key clicks

aesthetic_diff.md

@@ -195,13 +195,13 @@ GANDALF (`style.css`, `.section-title`):
 | Slide direction | from bottom | from top | from right | from right (`translateX(30px)`) |
 | Animation duration | `0.3s ease` | `0.3s ease-out` | `0.15s ease` | `0.2s ease-out` |
 | Auto-dismiss | 3500ms | 3000ms | 3500ms | `3500ms` |
-| Icon format | `>> ` prefix | `✓/✗/ℹ` prefix (inline style) | `>> ` prefix | `>> ` prefix + icon in `.lt-toast-icon` |
+| Icon format | `>> ` prefix | `✓/✗/ℹ` prefix (inline style) | `>> ` prefix | `[✓]` `[✗]` `[!]` `[i]` in `.lt-toast-icon` |
 | Queue system | Yes (serialised) | No (stacks) | No (stacks) | Yes (serialised) |
 
 **Change required in PULSE:** Move toast position to `bottom: 20px; right: 20px`.
-Replace inline-style notification function with `.lt-toast` classes.
+Replace inline-style `showTerminalNotification()` with `lt.toast.*` calls. The icon format in `base.js` uses bracketed symbols: `[✓]`, `[✗]`, `[!]`, `[i]` — matches the terminal aesthetic better than bare unicode symbols.
 
-**Change required in GANDALF:** Already close — update animation to `slide-in-right` instead of `slide-in` (which slides from left in Gandalf's current implementation).
+**Change required in GANDALF:** Already close — update animation to `slide-in-right` instead of `slide-in` (which slides from left in GANDALF's current implementation). Replace `showToast()` calls with `lt.toast.*` calls.
 
 ---
 

base.js

@@ -298,11 +298,13 @@
     overlay.style.opacity = '1';
 
     const name      = (appName || 'TERMINAL').toUpperCase();
-    const bar     = '═'.repeat(Math.max(0, 41 - name.length));
+    const titleStr  = name + ' v1.0';
-    const pad     = ' '.repeat(Math.max(0, Math.floor((39 - name.length) / 2)));
+    const innerWidth = 43;
+    const leftPad   = Math.max(0, Math.floor((innerWidth - titleStr.length) / 2));
+    const rightPad  = Math.max(0, innerWidth - titleStr.length - leftPad);
     const messages = [
       '╔═══════════════════════════════════════════╗',
-      '║' + pad + name + ' v1.0' + pad + '║',
+      '║' + ' '.repeat(leftPad) + titleStr + ' '.repeat(rightPad) + '║',
       '║           BOOTING SYSTEM...              ║',
       '╚═══════════════════════════════════════════╝',
       '',

node/middleware.js

@@ -189,13 +189,19 @@ function createRateLimit(opts) {
   const hits = new Map();
 
   return function rateLimit(req, res, next) {
-    const key = req.ip || 'unknown';
+    const key = req.ip || req.socket?.remoteAddress || 'unknown';
     const now  = Date.now();
     const entry = hits.get(key) || { count: 0, reset: now + windowMs };
 
     if (now > entry.reset) {
       entry.count = 0;
       entry.reset = now + windowMs;
+      /* Prune expired entries periodically to prevent memory growth */
+      if (hits.size > 5000) {
+        for (const [k, v] of hits) {
+          if (now > v.reset) hits.delete(k);
+        }
+      }
     }
     entry.count++;
     hits.set(key, entry);