fix: Session auth, sidebar toggle, and dependencies table

- Change session.cookie_samesite from Strict to Lax for Authelia compatibility
- Redesign sidebar toggle with separate collapse/expand buttons
- Add script to create missing ticket_dependencies table
- Add .env.example template
- Add check for missing .env with helpful error message

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

assets/css/dashboard.css

@@ -1692,74 +1692,81 @@ input[type="checkbox"]:checked {
 }
 
 /* Collapsible Sidebar */
-.dashboard-layout {
-    position: relative;
-}
-
-.sidebar-toggle {
-    position: absolute;
-    left: 250px;
-    top: 1rem;
-    width: 24px;
-    height: 48px;
-    background: var(--bg-secondary);
-    border: 2px solid var(--terminal-green);
-    color: var(--terminal-green);
-    cursor: pointer;
-    z-index: 100;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    transition: left 0.3s ease, background 0.2s ease;
-    padding: 0;
-    border-radius: 0 4px 4px 0;
-}
-
-.sidebar-toggle:hover {
-    background: rgba(0, 255, 65, 0.2);
-    color: var(--terminal-amber);
-    border-color: var(--terminal-amber);
-}
-
-.toggle-arrow {
-    transition: transform 0.3s ease;
-    font-size: 0.9rem;
-}
-
 .dashboard-sidebar {
     position: relative;
-    transition: width 0.3s ease, opacity 0.3s ease;
+    transition: width 0.3s ease, min-width 0.3s ease;
     overflow: hidden;
 }
 
 .sidebar-content {
-    transition: opacity 0.3s ease;
+    transition: opacity 0.2s ease;
     width: 250px;
 }
 
+/* Collapse button inside sidebar */
+.sidebar-collapse-btn {
+    display: block;
+    width: 100%;
+    padding: 0.5rem 1rem;
+    background: var(--bg-secondary);
+    border: none;
+    border-bottom: 2px solid var(--terminal-green);
+    color: var(--terminal-green);
+    font-family: var(--font-mono);
+    font-size: 0.85rem;
+    cursor: pointer;
+    text-align: left;
+    transition: background 0.2s ease;
+}
+
+.sidebar-collapse-btn:hover {
+    background: rgba(0, 255, 65, 0.15);
+    color: var(--terminal-amber);
+}
+
+/* Expand button shown when collapsed */
+.sidebar-expand-btn {
+    display: none;
+    padding: 0.5rem 1rem;
+    background: var(--bg-secondary);
+    border: 2px solid var(--terminal-green);
+    color: var(--terminal-green);
+    font-family: var(--font-mono);
+    font-size: 0.85rem;
+    cursor: pointer;
+    white-space: nowrap;
+    transition: background 0.2s ease;
+    margin-right: 1rem;
+    flex-shrink: 0;
+}
+
+.sidebar-expand-btn:hover {
+    background: rgba(0, 255, 65, 0.15);
+    color: var(--terminal-amber);
+    border-color: var(--terminal-amber);
+}
+
 /* Collapsed state */
 .dashboard-sidebar.collapsed {
     width: 0;
     min-width: 0;
 }
 
-.dashboard-sidebar.collapsed .sidebar-content {
+.dashboard-sidebar.collapsed .sidebar-content,
+.dashboard-sidebar.collapsed .sidebar-collapse-btn {
     opacity: 0;
     pointer-events: none;
 }
 
-.dashboard-layout.sidebar-collapsed .sidebar-toggle {
-    left: 0;
+.dashboard-layout.sidebar-collapsed .sidebar-expand-btn {
+    display: block;
 }
 
-.dashboard-layout.sidebar-collapsed .toggle-arrow {
-    transform: rotate(180deg);
-}
-
-/* Hide toggle on mobile */
+/* Hide collapse controls on mobile */
 @media (max-width: 768px) {
-    .sidebar-toggle {
-        display: none;
+    .sidebar-collapse-btn,
+    .sidebar-expand-btn {
+        display: none !important;
     }
 }