fix: admin login, clean URLs, blog links

- Fix admin login: ID mismatch (loginUser->loginUsername, loginPass->loginPassword)
- Fix auth URL: /api/auth -> /api/auth/login
- Fix init() structure: broken if/else for checkAuth
- Remove onclick from login button (JS handles via addEventListener)
- Clean URLs: /blog/post/slug instead of post.html?slug=slug
- Updated blog.js, post.js, main.js with clean URL links
- post.js supports both /blog/post/slug and ?slug=x formats
- nginx configured for /blog/post/* rewrite

admin.html

@@ -26,7 +26,7 @@
                     <label class="login-label">PASSPHRASE</label>
                     <input type="password" id="loginPassword" class="login-input" placeholder="Enter password..." autocomplete="current-password">
                 </div>
-                <button id="loginBtn" class="login-btn" onclick="AdminApp.login()">▶ AUTHENTICATE</button>
+                <button id="loginBtn" class="login-btn">▶ AUTHENTICATE</button>
                 <div id="loginError" class="login-error"></div>
             </div>
             <div class="login-footer">SECURE CHANNEL // AES-256 ENCRYPTED</div>

js/admin.js

@@ -25,11 +25,22 @@ const AdminApp = {
     /* ───────────────────────── AUTH ───────────────────────── */
 
     init() {
-        // Login form
+        // Login form - support both <form> submit and button click
         const loginForm = document.getElementById('loginForm');
         if (loginForm) {
             loginForm.addEventListener('submit', (e) => this.login(e));
         }
+        const loginBtn = document.getElementById('loginBtn');
+        if (loginBtn && !loginForm) {
+            loginBtn.addEventListener('click', (e) => this.login(e));
+        }
+        // Also handle Enter key in password field
+        const loginPass = document.getElementById('loginPassword');
+        if (loginPass) {
+            loginPass.addEventListener('keydown', (e) => {
+                if (e.key === 'Enter') this.login(e);
+            });
+        }
 
         // Check auth state
         if (this.checkAuth()) {
@@ -111,14 +122,14 @@ const AdminApp = {
     },
 
     async login(e) {
-        e.preventDefault();
-        const user = document.getElementById('loginUser').value.trim();
-        const pass = document.getElementById('loginPass').value;
+        if (e && e.preventDefault) e.preventDefault();
+        const user = document.getElementById('loginUsername').value.trim();
+        const pass = document.getElementById('loginPassword').value;
         const errEl = document.getElementById('loginError');
-        errEl.textContent = '';
+        if (errEl) errEl.textContent = '';
 
         try {
-            const res = await fetch(this.API + '/auth', {
+            const res = await fetch(this.API + '/auth/login', {
                 method: 'POST',
                 headers: { 'Content-Type': 'application/json' },
                 body: JSON.stringify({ username: user, password: pass })

js/blog.js

@@ -57,7 +57,7 @@
     // ─── Render Post Card ───
     function renderPostCard(post) {
         return `
-        <article class="post-card" onclick="window.location='post.html?slug=${post.slug}'" data-tags="${(post.tags || []).join(',')}">
+        <article class="post-card" onclick="window.location='/blog/post/${post.slug}'" data-tags="${(post.tags || []).join(',')}">
             <div class="post-card-content">
                 <div class="post-card-meta">
                     <span class="post-date">${post.date}</span>

js/main.js

@@ -800,7 +800,7 @@
                         <p class="blog-excerpt">${post.excerpt || (post.content || '').substring(0, 120) + '...'}</p>
                         <div class="blog-footer">
                             <span class="blog-read-time">◷ ${Math.max(1, Math.ceil((post.word_count || 300) / 250))} MIN READ</span>
-                            <a href="post.html?slug=${post.slug}" class="blog-link">READ →</a>
+                            <a href="/blog/post/${post.slug}" class="blog-link">READ →</a>
                         </div>
                     </article>
                 `).join('');

js/post.js

@@ -227,7 +227,7 @@
 
         if (idx > 0) {
             const prev = sorted[idx - 1];
-            navHtml += `<a href="post.html?slug=${prev.slug}" class="post-nav-link nav-newer">
+            navHtml += `<a href="/blog/post/${prev.slug}" class="post-nav-link nav-newer">
                 <span class="nav-dir">← NEWER</span>
                 <span class="nav-post-title">${prev.title}</span>
             </a>`;
@@ -235,13 +235,13 @@
 
         if (idx < sorted.length - 1) {
             const next = sorted[idx + 1];
-            navHtml += `<a href="post.html?slug=${next.slug}" class="post-nav-link nav-older">
+            navHtml += `<a href="/blog/post/${next.slug}" class="post-nav-link nav-older">
                 <span class="nav-dir">OLDER →</span>
                 <span class="nav-post-title">${next.title}</span>
             </a>`;
         }
 
-        navHtml += `<a href="blog.html" class="post-nav-link nav-all">
+        navHtml += `<a href="/blog" class="post-nav-link nav-all">
             <span class="nav-dir">⟐ ALL TRANSMISSIONS</span>
         </a>`;
 
@@ -250,8 +250,15 @@
 
     // ─── Load Post ───
     async function loadPost() {
+        // Support both /blog/post/slug and ?slug=x formats
+        let slug = null;
+        const pathMatch = window.location.pathname.match(/\/blog\/post\/([^\/]+)/);
+        if (pathMatch) {
+            slug = decodeURIComponent(pathMatch[1]);
+        } else {
             const params = new URLSearchParams(window.location.search);
-        const slug = params.get('slug');
+            slug = params.get('slug');
+        }
 
         if (!slug) {
             document.getElementById('postContent').innerHTML =