beacon: add progression toast notifications for phase/building/project unlocks

Animated toasts slide in from the right when:
- A new phase is reached (gold border)
- A building unlocks for the first time (blue border)
- A research project completes (green border, gold title for milestones)

Toasts auto-dismiss after 4s with fade-out. Max 4 visible at once.
seenBuildings state persisted in save data so toasts don't re-fire on reload.

This makes progression events impossible to miss — previously they only
showed in the scrolling system log.

game.js

@@ -118,6 +118,9 @@ const G = {
     // Bulk buy multiplier (1, 10, or -1 for max)
     buyAmount: 1,
 
+    // Track which buildings have had their unlock toasted
+    seenBuildings: {},
+
     // Time tracking
     playTime: 0,
     startTime: 0
@@ -1072,6 +1075,21 @@ function tick() {
     }
 }
 
+// === TOAST NOTIFICATIONS ===
+function showToast(title, msg, type) {
+    const container = document.getElementById('toast-container');
+    if (!container) return;
+    const el = document.createElement('div');
+    el.className = `toast toast-${type}`;
+    el.innerHTML = `<div class="toast-title">${title}</div><div class="toast-msg">${msg}</div>`;
+    container.appendChild(el);
+    // Auto-dismiss after 4s
+    setTimeout(() => { el.classList.add('fade-out'); }, 4000);
+    setTimeout(() => { el.remove(); }, 4600);
+    // Cap visible toasts at 4
+    while (container.children.length > 4) container.removeChild(container.firstChild);
+}
+
 function checkMilestones() {
     for (const m of MILESTONES) {
         if (!G.milestones.includes(m.flag)) {
@@ -1089,6 +1107,7 @@ function checkMilestones() {
                         if (G.totalCode >= phase.threshold && parseInt(phaseNum) > G.phase) {
                             G.phase = parseInt(phaseNum);
                             log(`PHASE ${G.phase}: ${phase.name}`, true);
+                            showToast(`PHASE ${G.phase}: ${phase.name}`, phase.desc, 'phase');
                         }
                     }
                 }
@@ -1161,6 +1180,8 @@ function buyProject(id) {
         G.activeProjects = G.activeProjects.filter(aid => aid !== pDef.id);
     }
 
+    showToast(pDef.milestone ? '★ ' + pDef.name : pDef.name, pDef.desc, 'project');
+
     updateRates();
     render();
 }
@@ -1608,6 +1629,12 @@ function renderBuildings() {
         visibleCount++;
         const count = G.buildings[def.id] || 0;
 
+        // Toast on first unlock
+        if (isUnlocked && !G.seenBuildings[def.id]) {
+            G.seenBuildings[def.id] = true;
+            showToast('NEW: ' + def.name, def.desc, 'building');
+        }
+
         // Locked preview: show dimmed with unlock hint
         if (!isUnlocked) {
             html += `<div class="build-btn" style="opacity:0.25;cursor:default" title="${def.edu || ''}">`;
@@ -1995,6 +2022,7 @@ function saveGame() {
         activeDebuffIds: debuffIds,
         totalEventsResolved: G.totalEventsResolved || 0,
         buyAmount: G.buyAmount || 1,
+        seenBuildings: G.seenBuildings || {},
         savedAt: Date.now()
     };
 

index.html

@@ -84,6 +84,18 @@ body{background:var(--bg);color:var(--text);font-family:'SF Mono','Cascadia Code
 #drift-ending button{margin-top:20px;background:#1a0808;border:1px solid #f44336;color:#f44336;padding:10px 24px;border-radius:4px;cursor:pointer;font-family:inherit;font-size:11px}
 #drift-ending button:hover{background:#2a1010}
 ::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}
+#toast-container{position:fixed;top:60px;right:16px;z-index:80;display:flex;flex-direction:column;gap:8px;pointer-events:none}
+.toast{background:#0e1420;border:1px solid #2a3a4a;border-radius:6px;padding:10px 16px;max-width:320px;animation:toast-in 0.3s ease-out;opacity:1;transition:opacity 0.5s ease-out;pointer-events:auto}
+.toast.fade-out{opacity:0}
+.toast-phase{border-color:var(--gold);border-width:2px}
+.toast-phase .toast-title{color:var(--gold);text-shadow:0 0 12px rgba(255,215,0,0.3)}
+.toast-building{border-color:var(--accent)}
+.toast-building .toast-title{color:var(--accent)}
+.toast-project{border-color:var(--green)}
+.toast-project .toast-title{color:var(--green)}
+.toast-title{font-size:12px;font-weight:700;letter-spacing:1px;margin-bottom:2px}
+.toast-msg{font-size:10px;color:#888;line-height:1.4}
+@keyframes toast-in{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}
 </style>
 </head>
 <body>
@@ -160,6 +172,7 @@ Events Resolved: <span id="st-resolved">0</span>
 <h2>SYSTEM LOG</h2>
 <div id="log-entries"></div>
 </div>
+<div id="toast-container"></div>
 <div id="save-toast" style="display:none;position:fixed;top:16px;right:16px;background:#0e1420;border:1px solid #2a3a4a;color:#4a9eff;font-size:10px;padding:6px 12px;border-radius:4px;z-index:50;opacity:0;transition:opacity 0.4s;pointer-events:none">Save</div>
 <div id="drift-ending">
 <h2>THE DRIFT</h2>