Frontend: scroll fix, SSE reconnect, toast global, stale states, theming

5 bloques en una pasada:

A. Scroll fixes (síntoma reportado por el usuario):
   - run-timeline: nuevo flag _userScrolledUp con detección por rAF en
     bindScroll. Auto-scroll al final SOLO si el usuario está abajo
     (umbral 150px) o si él mismo disparó un optimistic bubble. Cuando
     el usuario manda mensaje, se resetea el flag y se scrollea.
   - conversation-inspector: mismo patrón. ui:chatScroll respeta el
     flag userScrolledUp del emisor para no perseguir al usuario que
     lee arriba.
   - .bubble: + min-width:0, overflow-wrap:anywhere para URLs/JSON
     largos sin espacios.
   - <pre>: + overflow-x:auto, max-width:100%.
   - chat-simulator: textarea con resize:vertical, min/max heights
     viewport-friendly. inputs-col con overflow-y:auto.

B. Stale state options:
   - conversation-list y conversations-crud: dropdowns ahora muestran
     IDLE / CART / SHIPPING / AWAITING_HUMAN. Quitados BROWSING,
     BUILDING_ORDER, WAITING_ADDRESS, WAITING_PAYMENT, COMPLETED.
   - main.js: simulated plan.next_state pasa a CART.

C. SSE resilience (lib/sse.js):
   - connect() con backoff exponencial (1s → 30s).
   - safeParse() helper: cada evento envuelve JSON.parse en try-catch
     para que un payload malformado no rompa otros listeners.
   - reset retryDelay al primer "hello" exitoso.
   - ops-shell: indicador con dot (verde "En vivo" / naranja pulsante
     "Reconectando…") en lugar de texto plano.

D. Toast service global (public/lib/toast.js):
   - API simple: toast({ kind, text, ms }). Apila, animación slide-in,
     auto-dismiss 4s. Click para cerrar.
   - safeFetch en api.js: wrapper que dispara toast en network error y
     non-OK. Migrados simEvolution + retryLast.
   - chat-simulator usa toast en lugar de status text efímero.

E. Theming con CSS vars:
   - public/styles/theme.css con paleta completa (panels, borders,
     text, accents, bubbles, charts, radii, shadows). Linkeado desde
     index.html.
   - Migrados a var(--*) los 5 componentes más visibles:
     run-timeline, chat-simulator, conversation-inspector,
     conversation-list, home-dashboard. Custom properties heredan a
     través del shadow DOM, así que los demás componentes pueden
     migrar gradualmente sin cambios estructurales.
   - home-dashboard ya tenía vars locales: ahora apuntan a las globales.

Backend: 192/192 tests pasando. Sin cambios de API.

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

public/components/chat-simulator.js

@@ -1,6 +1,7 @@
 import { api } from "../lib/api.js";
 import { emit, on } from "../lib/bus.js";
 import { modal } from "../lib/modal.js";
+import { toast } from "../lib/toast.js";
 
 class ChatSimulator extends HTMLElement {
   constructor() {
@@ -12,23 +13,23 @@ class ChatSimulator extends HTMLElement {
       <style>
         :host { display:block; height:100%; overflow:hidden; }
         * { box-sizing:border-box; }
-        .container { display:grid; grid-template-columns:1fr 1fr; gap:0; height:100%; overflow:hidden; }
+        .container { display:grid; grid-template-columns:1fr 1fr; gap:0; height:100%; min-height:0; overflow:hidden; }
-        .col { display:flex; flex-direction:column; padding:10px 12px; border-right:1px solid #1e2a3a; min-width:0; overflow:hidden; }
+        .col { display:flex; flex-direction:column; padding:10px 12px; border-right:1px solid var(--border); min-width:0; min-height:0; overflow:hidden; }
         .col:last-child { border-right:none; }
-        .muted { color:#8aa0b5; font-size:11px; margin-bottom:6px; }
+        .muted { color:var(--text-muted); font-size:11px; margin-bottom:6px; }
         .row { display:flex; gap:8px; align-items:center; }
-        input,textarea,button { background:#0f1520; color:#e7eef7; border:1px solid #253245; border-radius:6px; padding:6px 8px; font-size:12px; box-sizing:border-box; }
+        input,textarea,button { background:var(--panel-2); color:var(--text); border:1px solid var(--border-hi); border-radius:var(--r-sm); padding:6px 8px; font-size:12px; box-sizing:border-box; }
         input { width:100%; min-width:0; }
-        textarea { width:100%; resize:none; height:186px; min-width:0; margin-bottom:10px;}
+        textarea { width:100%; resize:vertical; min-height:120px; max-height:60vh; min-width:0; margin-bottom:10px; word-break:break-word; overflow-wrap:anywhere; }
         button { cursor:pointer; white-space:nowrap; }
-        button.primary { background:#1f6feb; border-color:#1f6feb; }
+        button.primary { background:var(--accent); border-color:var(--accent); }
         button:disabled { opacity:.6; cursor:not-allowed; }
-        .status { font-size:11px; color:#8aa0b5; margin-top:6px; }
+        .status { font-size:11px; color:var(--text-muted); margin-top:6px; word-break:break-word; }
-        .inputs-col { display:flex; flex-direction:column; gap:6px; flex:1; overflow:hidden; min-width:0; }
+        .inputs-col { display:flex; flex-direction:column; gap:6px; flex:1; min-height:0; min-width:0; overflow-y:auto; padding-right:4px; }
         .field { display:flex; flex-direction:column; min-width:0; }
-        .field label { font-size:10px; color:#8aa0b5; margin-bottom:2px; }
+        .field label { font-size:10px; color:var(--text-muted); margin-bottom:2px; }
-        .msg-col { display:flex; flex-direction:column; min-width:0; }
+        .msg-col { display:flex; flex-direction:column; min-width:0; min-height:0; flex:1; }
-        .msg-bottom { display:flex; gap:8px; align-items:center; margin-top:6px; }
+        .msg-bottom { display:flex; gap:8px; align-items:center; margin-top:6px; flex-wrap:wrap; }
       </style>
 
       <div class="container">
@@ -167,14 +168,15 @@ class ChatSimulator extends HTMLElement {
         console.log("[evolution sim] webhook response:", data);
 
         if (!data.ok) {
-          statusEl.textContent = "Error enviando (ver consola)";
+          toast({ kind: "error", text: `Sim Evolution: ${data.error || "respuesta no-ok"}` });
           return;
         }
 
         evoTextEl.value = "";
         evoTextEl.focus();
       } catch (e) {
-        statusEl.textContent = `Error: ${String(e?.message || e)}`;
+        // safeFetch ya disparó toast; sólo logueamos.
+        console.error("[chat-simulator] send error:", e);
       } finally {
         setSending(false);
       }
@@ -187,10 +189,10 @@ class ChatSimulator extends HTMLElement {
       api
         .retryLast(chat_id)
         .then((r) => {
-          if (!r?.ok) statusEl.textContent = `Retry error: ${r?.error || "unknown"}`;
+          if (!r?.ok) toast({ kind: "error", text: `Retry: ${r?.error || "fallo"}` });
-          else statusEl.textContent = "Retry enviado.";
+          else toast({ kind: "ok", text: "Retry enviado." });
         })
-        .catch((e) => (statusEl.textContent = `Retry error: ${String(e?.message || e)}`))
+        .catch((e) => console.error("[chat-simulator] retry error:", e))
         .finally(() => setSending(false));
     };
     retryEl.disabled = false;

public/components/conversation-inspector.js

@@ -14,34 +14,36 @@ class ConversationInspector extends HTMLElement {
     this._playing = false;
     this._playIdx = 0;
     this._timer = null;
+    this._userScrolledUp = false;
+    this._scrollRaf = null;
 
     this.shadowRoot.innerHTML = `
       <style>
         :host { display:block; padding:12px; height:100%; overflow:hidden; }
-        .box { background:#121823; border:1px solid #1e2a3a; border-radius:10px; padding:10px; height:100%; display:flex; flex-direction:column; min-height:0; box-sizing:border-box; }
+        .box { background:var(--panel); border:1px solid var(--border); border-radius:var(--r-lg); padding:10px; height:100%; display:flex; flex-direction:column; min-height:0; box-sizing:border-box; }
         .row { display:flex; gap:8px; align-items:center; }
-        .muted { color:#8aa0b5; font-size:12px; }
+        .muted { color:var(--text-muted); font-size:12px; }
         .title { font-weight:800; }
         .toolbar { display:flex; gap:8px; margin-top:8px; align-items:center; }
-        button { cursor:pointer; background:#0f1520; color:#e7eef7; border:1px solid #253245; border-radius:8px; padding:8px; font-size:13px; }
+        button { cursor:pointer; background:var(--panel-2); color:var(--text); border:1px solid var(--border-hi); border-radius:var(--r-md); padding:8px; font-size:13px; }
         .list { display:flex; flex-direction:column; gap:0; overflow-y:auto; padding-right:6px; margin-top:8px; flex:1; min-height:0; }
-        .item { border:1px solid #253245; border-radius:12px; padding:8px 10px; background:#0f1520; font-size:12px; margin-bottom:12px; box-sizing:border-box; }
+        .item { border:1px solid var(--border-hi); border-radius:12px; padding:8px 10px; background:var(--panel-2); font-size:12px; margin-bottom:12px; box-sizing:border-box; }
-        .item.in { background:#0f1520; border-color:#2a3a55; }
+        .item.in { background:var(--panel-2); border-color:var(--bot-border); }
-        .item.out { background:#111b2a; border-color:#2a3a55; }
+        .item.out { background:var(--bot-bubble); border-color:var(--bot-border); }
-        .item.active { outline:2px solid #1f6feb; box-shadow: 0 0 0 2px rgba(31,111,235,.25); }
+        .item.active { outline:2px solid var(--accent); box-shadow: 0 0 0 2px rgba(31,111,235,.25); }
         .item-row { display:flex; gap:8px; }
         .item-left { flex:1; min-width:0; }
         .item-right { display:flex; flex-direction:column; gap:4px; align-items:flex-end; justify-content:flex-start; min-width:60px; }
         .kv { display:grid; grid-template-columns:55px 1fr; gap:4px 6px; }
-        .k { color:#8aa0b5; font-size:10px; letter-spacing:.3px; text-transform:uppercase; }
+        .k { color:var(--text-muted); font-size:10px; letter-spacing:.3px; text-transform:uppercase; }
-        .v { font-size:11px; color:#e7eef7; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
+        .v { font-size:11px; color:var(--text); white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
         .chips { display:flex; flex-direction:column; gap:3px; align-items:flex-end; }
-        .chip { display:inline-flex; align-items:center; gap:3px; padding:2px 5px; border-radius:999px; background:#1d2a3a; border:1px solid #243247; font-size:9px; color:#8aa0b5; white-space:nowrap; }
+        .chip { display:inline-flex; align-items:center; gap:3px; padding:2px 5px; border-radius:999px; background:#1d2a3a; border:1px solid #243247; font-size:9px; color:var(--text-muted); white-space:nowrap; }
         .chip .dot { flex-shrink:0; }
-        .cart { margin-top:4px; font-size:10px; color:#c7d8ee; line-height:1.3; }
+        .cart { margin-top:4px; font-size:10px; color:var(--bot-name); line-height:1.3; }
-        .tool { margin-top:6px; font-size:11px; color:#8aa0b5; }
+        .tool { margin-top:6px; font-size:11px; color:var(--text-muted); }
         .dot { width:8px; height:8px; border-radius:50%; }
-        .ok { background:#2ecc71; } .warn { background:#f1c40f; } .err { background:#e74c3c; }
+        .ok { background:var(--ok); } .warn { background:var(--warn); } .err { background:var(--err); }
       </style>
 
       <div class="box">
@@ -83,8 +85,11 @@ class ConversationInspector extends HTMLElement {
       this.applyHeights();
     });
 
-    this._unsubScroll = on("ui:chatScroll", ({ chat_id, scrollTop }) => {
+    this._unsubScroll = on("ui:chatScroll", ({ chat_id, scrollTop, userScrolledUp }) => {
       if (!this.chatId || chat_id !== this.chatId) return;
+      // Si el otro panel está scrolleado-up, sincronizamos. Si no, dejamos
+      // a este panel manejar su propio scroll para evitar saltos cruzados.
+      if (!userScrolledUp) return;
       const list = this.shadowRoot.getElementById("list");
       list.scrollTop = scrollTop || 0;
     });
@@ -336,8 +341,24 @@ class ConversationInspector extends HTMLElement {
       this.rowOrder.push(msgId);
     }
 
-    // Auto-scroll al final
+    // Auto-scroll al final, salvo que el usuario esté leyendo arriba.
-    list.scrollTop = list.scrollHeight;
+    if (!this._userScrolledUp) {
+      list.scrollTop = list.scrollHeight;
+    }
+    this._bindScroll(list);
+  }
+
+  _bindScroll(list) {
+    if (this._scrollBound) return;
+    this._scrollBound = true;
+    list.addEventListener("scroll", () => {
+      if (this._scrollRaf) return;
+      this._scrollRaf = requestAnimationFrame(() => {
+        this._scrollRaf = null;
+        const distFromBottom = list.scrollHeight - list.scrollTop - list.clientHeight;
+        this._userScrolledUp = distFromBottom > 150;
+      });
+    });
   }
 
   applyHeights() {
@@ -438,7 +459,9 @@ class ConversationInspector extends HTMLElement {
     `;
 
     list.appendChild(el);
+    // Optimistic: el usuario acaba de mandar — forzamos al final.
     list.scrollTop = list.scrollHeight;
+    this._userScrolledUp = false;
 
     this.rowMap.set(msg.message_id, el);
     this.rowOrder.push(msg.message_id);

public/components/conversation-list.js

@@ -15,25 +15,25 @@ class ConversationList extends HTMLElement {
     this.shadowRoot.innerHTML = `
       <style>
         :host { display:block; padding:12px; }
-        .box { background:#121823; border:1px solid #1e2a3a; border-radius:10px; padding:10px; margin-bottom:10px; }
+        .box { background:var(--panel); border:1px solid var(--border); border-radius:var(--r-lg); padding:10px; margin-bottom:10px; }
         .row { display:flex; gap:8px; align-items:center; }
-        input,select,button { background:#0f1520; color:#e7eef7; border:1px solid #253245; border-radius:8px; padding:8px; font-size:13px; }
+        input,select,button { background:var(--panel-2); color:var(--text); border:1px solid var(--border-hi); border-radius:var(--r-md); padding:8px; font-size:13px; }
         button { cursor:pointer; }
         button.ghost { background:transparent; }
         button:disabled { opacity:.6; cursor:not-allowed; }
         .tabs { display:flex; gap:8px; margin-bottom:10px; }
-        .tab { flex:1; text-align:center; padding:8px; border-radius:8px; border:1px solid #253245; cursor:pointer; color:#8aa0b5; background:#121823; }
+        .tab { flex:1; text-align:center; padding:8px; border-radius:var(--r-md); border:1px solid var(--border-hi); cursor:pointer; color:var(--text-muted); background:var(--panel); }
-        .tab.active { border-color:#1f6feb; color:#e7eef7; background:#0f1520; }
+        .tab.active { border-color:var(--accent); color:var(--text); background:var(--panel-2); }
         .list { display:flex; flex-direction:column; gap:8px; }
-        .item { background:#121823; border:1px solid #1e2a3a; border-radius:10px; padding:10px; cursor:pointer; }
+        .item { background:var(--panel); border:1px solid var(--border); border-radius:var(--r-lg); padding:10px; cursor:pointer; }
         .item:hover { border-color:#2b3b52; }
-        .item.active { border-color:#1f6feb; }
+        .item.active { border-color:var(--accent); }
         .title { font-weight:800; }
-        .muted { color:#8aa0b5; font-size:12px; }
+        .muted { color:var(--text-muted); font-size:12px; }
         .chips { display:flex; flex-wrap:wrap; gap:6px; margin-top:8px; }
-        .chip { display:inline-flex; align-items:center; gap:6px; padding:3px 8px; border-radius:999px; background:#1d2a3a; border:1px solid #243247; font-size:12px; color:#8aa0b5; }
+        .chip { display:inline-flex; align-items:center; gap:6px; padding:3px 8px; border-radius:999px; background:#1d2a3a; border:1px solid #243247; font-size:12px; color:var(--text-muted); }
         .dot { width:8px; height:8px; border-radius:50%; }
-        .ok{ background:#2ecc71 } .warn{ background:#f1c40f } .err{ background:#e74c3c }
+        .ok{ background:var(--ok) } .warn{ background:var(--warn) } .err{ background:var(--err) }
         .actions { display:flex; gap:8px; justify-content:flex-end; margin-top:8px; flex-wrap:wrap; }
       </style>
 
@@ -62,7 +62,10 @@ class ConversationList extends HTMLElement {
           </select>
           <select id="state" style="flex:1">
             <option value="">State: all</option>
-            <option>IDLE</option><option>BROWSING</option><option>BUILDING_ORDER</option><option>WAITING_ADDRESS</option><option>WAITING_PAYMENT</option><option>COMPLETED</option>
+            <option>IDLE</option>
+            <option>CART</option>
+            <option>SHIPPING</option>
+            <option>AWAITING_HUMAN</option>
           </select>
         </div>
       </div>

public/components/conversations-crud.js

@@ -68,11 +68,9 @@ class ConversationsCrud extends HTMLElement {
             <select id="state">
               <option value="">State: todos</option>
               <option>IDLE</option>
-              <option>BROWSING</option>
+              <option>CART</option>
-              <option>BUILDING_ORDER</option>
+              <option>SHIPPING</option>
-              <option>WAITING_ADDRESS</option>
+              <option>AWAITING_HUMAN</option>
-              <option>WAITING_PAYMENT</option>
-              <option>COMPLETED</option>
             </select>
           </div>
           <div class="list" id="list">

public/components/home-dashboard.js

@@ -21,18 +21,16 @@ class HomeDashboard extends HTMLElement {
     this.shadowRoot.innerHTML = `
       <style>
         :host {
-          --bg: #0b0f14;
+          /* Aliases locales que apuntan a los globals — los charts usan estos
-          --panel: #121823;
+             nombres cortos. Cambiar el tema desde theme.css se propaga aquí. */
-          --muted: #8aa0b5;
+          --line: var(--border);
-          --text: #e7eef7;
+          --blue: var(--chart-blue);
-          --line: #1e2a3a;
+          --green: var(--chart-green);
-          --blue: #3b82f6;
+          --purple: var(--chart-purple);
-          --green: #25D366;
+          --orange: var(--chart-orange);
-          --purple: #8B5CF6;
-          --orange: #F59E0B;
           --emerald: #10B981;
-          --pink: #EC4899;
+          --pink: var(--chart-pink);
-          --gray: #9CA3AF;
+          --gray: var(--chart-gray);
         }
         * { box-sizing: border-box; font-family: system-ui, Segoe UI, Roboto, Arial; }
         .container {

public/components/ops-shell.js

@@ -22,7 +22,11 @@ class OpsShell extends HTMLElement {
         .nav-btn:hover { border-color:var(--blue); color:var(--text); }
         .nav-btn.active { background:var(--blue); border-color:var(--blue); color:#fff; }
         .spacer { flex:1; }
-        .status { font-size:12px; color:var(--muted); }
+        .status { font-size:12px; color:var(--muted); display:flex; align-items:center; gap:6px; }
+        .status .dot { width:8px; height:8px; border-radius:50%; background:#25D366; }
+        .status.disconnected .dot { background:#F59E0B; animation: pulse 1.2s ease-in-out infinite; }
+        .status.disconnected { color:#F59E0B; }
+        @keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:.35; } }
         
         /* Notification bell */
         .notification-bell { position:relative; cursor:pointer; padding:8px; margin-right:12px; }
@@ -72,7 +76,7 @@ class OpsShell extends HTMLElement {
             <svg viewBox="0 0 24 24"><path d="M12 22c1.1 0 2-.9 2-2h-4c0 1.1.9 2 2 2zm6-6v-5c0-3.07-1.63-5.64-4.5-6.32V4c0-.83-.67-1.5-1.5-1.5s-1.5.67-1.5 1.5v.68C7.64 5.36 6 7.92 6 11v5l-2 2v1h16v-1l-2-2zm-2 1H8v-6c0-2.48 1.51-4.5 4-4.5s4 2.02 4 4.5v6z"/></svg>
             <span class="badge" id="takeoverBadge" style="display:none;">0</span>
           </div>
-          <div class="status" id="sseStatus">SSE: connecting…</div>
+          <div class="status disconnected" id="sseStatus"><span class="dot"></span><span class="label">Conectando…</span></div>
         </header>
 
         <div id="viewHome" class="view active">
@@ -161,7 +165,10 @@ class OpsShell extends HTMLElement {
   connectedCallback() {
     this._unsub = on("sse:status", (s) => {
       const el = this.shadowRoot.getElementById("sseStatus");
-      el.textContent = s.ok ? "SSE: connected" : "SSE: disconnected (retrying…)";
+      if (!el) return;
+      el.classList.toggle("disconnected", !s.ok);
+      const label = el.querySelector(".label");
+      if (label) label.textContent = s.ok ? "En vivo" : "Reconectando…";
     });
 
     // Listen for view switch requests from other components

public/components/run-timeline.js

@@ -7,32 +7,35 @@ class RunTimeline extends HTMLElement {
     this.attachShadow({ mode: "open" });
     this.chatId = null;
     this.items = [];
+    // Track if user scrolled away from the bottom — pause auto-scroll to not chase them
+    this._userScrolledUp = false;
+    this._scrollRaf = null;
 
     this.shadowRoot.innerHTML = `
       <style>
         :host { display:block; padding:12px; height:100%; overflow:hidden; }
-        .box { background:#121823; border:1px solid #1e2a3a; border-radius:10px; padding:10px; height:100%; display:flex; flex-direction:column; min-height:0; box-sizing:border-box; }
+        .box { background:var(--panel); border:1px solid var(--border); border-radius:var(--r-lg); padding:10px; height:100%; display:flex; flex-direction:column; min-height:0; box-sizing:border-box; }
         .row { display:flex; gap:8px; align-items:center; }
-        .muted { color:#8aa0b5; font-size:12px; }
+        .muted { color:var(--text-muted); font-size:12px; }
         .title { font-weight:800; }
         .chatlog { display:flex; flex-direction:column; gap:0; overflow-y:auto; padding-right:6px; margin-top:8px; flex:1; min-height:0; }
         /* WhatsApp-ish dark theme bubbles */
-        .bubble { max-width:90%; margin-bottom:12px; padding:8px 10px; border-radius:14px; border:1px solid #253245; font-size:13px; line-height:1.35; white-space:pre-wrap; word-break:break-word; box-shadow: 0 1px 0 rgba(0,0,0,.35); box-sizing:border-box; }
+        .bubble { max-width:90%; min-width:0; margin-bottom:12px; padding:8px 10px; border-radius:var(--r-xl); border:1px solid var(--border-hi); font-size:13px; line-height:1.35; white-space:pre-wrap; word-break:break-word; overflow-wrap:anywhere; box-shadow:var(--shadow-bubble); box-sizing:border-box; }
-        .bubble.user { align-self:flex-end; background:#0f2a1a; border-color:#1f6f43; color:#e7eef7; }
+        .bubble.user { align-self:flex-end; background:var(--user-bubble); border-color:var(--user-border); color:var(--text); }
-        .bubble.bot { align-self:flex-start; background:#111b2a; border-color:#2a3a55; color:#e7eef7; }
+        .bubble.bot { align-self:flex-start; background:var(--bot-bubble); border-color:var(--bot-border); color:var(--text); }
-        .bubble.err { align-self:flex-start; background:#241214; border-color:#e74c3c; color:#ffe9ea; cursor:pointer; }
+        .bubble.err { align-self:flex-start; background:var(--err-bubble); border-color:var(--err-border); color:var(--err-meta); cursor:pointer; }
-        .bubble.active { outline:2px solid #1f6feb; box-shadow: 0 0 0 2px rgba(31,111,235,.25); }
+        .bubble.active { outline:2px solid var(--accent); box-shadow: 0 0 0 2px rgba(31,111,235,.25); }
         .name { display:block; font-size:12px; font-weight:800; margin-bottom:4px; opacity:.95; }
-        .bubble.user .name { color:#cdebd8; text-align:right; }
+        .bubble.user .name { color:var(--user-name); text-align:right; }
-        .bubble.bot .name { color:#c7d8ee; }
+        .bubble.bot .name { color:var(--bot-name); }
-        .bubble.err .name { color:#ffd0d4; }
+        .bubble.err .name { color:var(--err-name); }
-        .bubble .meta { display:block; margin-top:6px; font-size:11px; color:#8aa0b5; }
+        .bubble .meta { display:block; margin-top:6px; font-size:11px; color:var(--text-muted); }
-        .bubble.user .meta { color:#b9d9c6; opacity:.85; }
+        .bubble.user .meta { color:var(--user-meta); opacity:.85; }
-        .bubble.bot .meta { color:#a9bed6; opacity:.85; }
+        .bubble.bot .meta { color:var(--bot-meta); opacity:.85; }
-        .bubble.err .meta { color:#ffd0d4; opacity:.85; }
+        .bubble.err .meta { color:var(--err-meta); opacity:.85; }
         .toolbar { display:flex; gap:8px; margin-top:8px; align-items:center; }
-        button { cursor:pointer; background:#0f1520; color:#e7eef7; border:1px solid #253245; border-radius:8px; padding:8px; font-size:13px; }
+        button { cursor:pointer; background:var(--panel-2); color:var(--text); border:1px solid var(--border-hi); border-radius:var(--r-md); padding:8px; font-size:13px; }
-        pre { white-space:pre-wrap; word-break:break-word; background:#0f1520; border:1px solid #253245; border-radius:10px; padding:10px; margin:0; font-size:12px; color:#d7e2ef; }
+        pre { white-space:pre-wrap; word-break:break-word; overflow-wrap:anywhere; overflow-x:auto; max-width:100%; background:var(--panel-2); border:1px solid var(--border-hi); border-radius:var(--r-lg); padding:10px; margin:0; font-size:12px; color:var(--text-dim); }
       </style>
 
       <div class="box">
@@ -197,14 +200,14 @@ class RunTimeline extends HTMLElement {
       addedOptimistic = true;
     }
 
-    // auto-scroll al final cuando hay mensajes nuevos
+    // Auto-scroll al final cuando hay mensajes nuevos.
-    // Solo si el usuario estaba cerca del final (dentro de 150px) o si había optimistas
+    // Si el usuario scrolleó arriba (>150px del fondo), respetamos su posición
-    const wasNearBottom = this._lastScrollPosition === undefined || 
+    // a menos que él mismo haya disparado un optimistic bubble.
-      (log.scrollHeight - this._lastScrollPosition - log.clientHeight) < 150;
+    if (addedOptimistic || !this._userScrolledUp) {
-    if (addedOptimistic || wasNearBottom) {
       log.scrollTop = log.scrollHeight;
+      // Una vez forzado al final, considerarlo "abajo" hasta que vuelva a scrollear arriba.
+      this._userScrolledUp = false;
     }
-    this._lastScrollPosition = log.scrollTop;
 
     requestAnimationFrame(() => this.emitLayout());
     this.bindScroll(log);
@@ -215,8 +218,14 @@ class RunTimeline extends HTMLElement {
     if (this._scrollBound) return;
     this._scrollBound = true;
     log.addEventListener("scroll", () => {
-      this._lastScrollPosition = log.scrollTop;
+      // Throttle con rAF: el handler real corre 1x por frame.
-      emit("ui:chatScroll", { chat_id: this.chatId, scrollTop: log.scrollTop });
+      if (this._scrollRaf) return;
+      this._scrollRaf = requestAnimationFrame(() => {
+        this._scrollRaf = null;
+        const distFromBottom = log.scrollHeight - log.scrollTop - log.clientHeight;
+        this._userScrolledUp = distFromBottom > 150;
+        emit("ui:chatScroll", { chat_id: this.chatId, scrollTop: log.scrollTop, userScrolledUp: this._userScrolledUp });
+      });
     });
   }
 
@@ -294,11 +303,10 @@ class RunTimeline extends HTMLElement {
 
     log.appendChild(bubble);
 
-    // Solo hacer scroll si el usuario ya estaba cerca del final (dentro de 100px)
+    // El usuario acaba de mandar un mensaje: forzamos al final y reseteamos
-    const wasNearBottom = (log.scrollHeight - log.scrollTop - log.clientHeight) < 100;
+    // el flag "scrolled-up" así los próximos mensajes del bot también auto-scrollean.
-    if (wasNearBottom) {
+    log.scrollTop = log.scrollHeight;
-      log.scrollTop = log.scrollHeight;
+    this._userScrolledUp = false;
-    }
 
     // Emit layout update
     requestAnimationFrame(() => this.emitLayout());

public/index.html

@@ -4,6 +4,7 @@
   <meta charset="utf-8" />
   <meta name="viewport" content="width=device-width,initial-scale=1" />
   <title>Bot Ops Console</title>
+  <link rel="stylesheet" href="/styles/theme.css" />
 </head>
 <body>
   <ops-shell></ops-shell>

public/lib/api.js

@@ -1,3 +1,35 @@
+import { toast } from "./toast.js";
+
+/**
+ * fetch wrapper que dispara toast en error de red o respuesta no-OK.
+ * Devuelve la respuesta parseada como JSON. Si la respuesta tiene
+ * `{ ok: false, error }`, también dispara toast.
+ */
+export async function safeFetch(url, opts = {}, { silent = false, label = null } = {}) {
+  let res;
+  try {
+    res = await fetch(url, opts);
+  } catch (err) {
+    if (!silent) toast({ kind: "error", text: `${label || "Red"}: ${err?.message || "sin conexión"}` });
+    throw err;
+  }
+  if (!res.ok) {
+    let body = null;
+    try { body = await res.json(); } catch (_) {}
+    const msg = body?.error || body?.message || `${res.status} ${res.statusText}`;
+    if (!silent) toast({ kind: "error", text: `${label || "Error"}: ${msg}` });
+    const err = new Error(msg);
+    err.status = res.status;
+    err.body = body;
+    throw err;
+  }
+  try {
+    return await res.json();
+  } catch (_) {
+    return {};
+  }
+}
+
 export const api = {
   async conversations({ q = "", status = "", state = "" } = {}) {
     const u = new URL("/conversations", location.origin);
@@ -46,16 +78,16 @@ export const api = {
   },
 
   async simEvolution(payload) {
-    return fetch("/webhook/evolution", {
+    return safeFetch("/webhook/evolution", {
       method: "POST",
       headers: { "Content-Type": "application/json" },
       body: JSON.stringify(payload),
-    }).then(r => r.json());
+    }, { label: "Sim Evolution" });
   },
 
   async retryLast(chat_id) {
     if (!chat_id) throw new Error("chat_id_required");
-    return fetch(`/conversations/${encodeURIComponent(chat_id)}/retry-last`, { method: "POST" }).then(r => r.json());
+    return safeFetch(`/conversations/${encodeURIComponent(chat_id)}/retry-last`, { method: "POST" }, { label: "Retry" });
   },
 
   // Products CRUD

public/lib/sse.js

@@ -1,15 +1,71 @@
 import { emit } from "./bus.js";
 
-export function connectSSE() {
+/**
-  const es = new EventSource("/stream");
+ * SSE client con reconnect exponencial y try-catch en parseo.
+ * Si el server reinicia o un evento viene malformado, no rompe la app.
+ */
 
-  es.addEventListener("hello", () => emit("sse:status", { ok: true }));
+let _es = null;
-  es.addEventListener("conversation.upsert", (e) => emit("conversation:upsert", JSON.parse(e.data)));
+let _retryDelay = 1000;
-  es.addEventListener("run.created", (e) => emit("run:created", JSON.parse(e.data)));
+let _retryTimer = null;
-  es.addEventListener("takeover.created", (e) => emit("takeover:created", JSON.parse(e.data)));
+const MAX_RETRY = 30_000;
-  es.addEventListener("order.created", (e) => emit("order:created", JSON.parse(e.data)));
 
-  es.onerror = () => emit("sse:status", { ok: false });
+const EVENTS = [
+  ["conversation.upsert", "conversation:upsert"],
+  ["run.created", "run:created"],
+  ["takeover.created", "takeover:created"],
+  ["order.created", "order:created"],
+];
 
-  return es;
+function safeParse(rawData, evName) {
+  try {
+    return JSON.parse(rawData);
+  } catch (err) {
+    console.error(`[sse] bad payload for ${evName}:`, err?.message || err);
+    return null;
+  }
+}
+
+function attach(es) {
+  es.addEventListener("hello", () => {
+    _retryDelay = 1000; // reset on success
+    emit("sse:status", { ok: true });
+  });
+
+  for (const [serverName, busName] of EVENTS) {
+    es.addEventListener(serverName, (e) => {
+      const data = safeParse(e.data, serverName);
+      if (data !== null) emit(busName, data);
+    });
+  }
+
+  es.onerror = () => {
+    emit("sse:status", { ok: false });
+    try { es.close(); } catch (_) {}
+    if (_es === es) _es = null;
+    scheduleReconnect();
+  };
+}
+
+function scheduleReconnect() {
+  if (_retryTimer) return;
+  const delay = _retryDelay;
+  _retryTimer = setTimeout(() => {
+    _retryTimer = null;
+    connectSSE();
+  }, delay);
+  _retryDelay = Math.min(_retryDelay * 2, MAX_RETRY);
+}
+
+export function connectSSE() {
+  if (_retryTimer) {
+    clearTimeout(_retryTimer);
+    _retryTimer = null;
+  }
+  if (_es) {
+    try { _es.close(); } catch (_) {}
+  }
+  _es = new EventSource("/stream");
+  attach(_es);
+  return _es;
 }

public/lib/toast.js

@@ -0,0 +1,81 @@
+/**
+ * Toast service global. Sin dependencias.
+ * Inyecta un container en <body> y empuja toasts apilados.
+ *
+ * Uso:
+ *   import { toast } from "./toast.js";
+ *   toast({ kind: "error", text: "No se pudo guardar" });
+ *   toast({ kind: "ok", text: "Listo", ms: 2000 });
+ */
+
+const KIND_COLORS = {
+  error: { bg: "#241214", border: "#e74c3c", text: "#ffe9ea" },
+  ok:    { bg: "#0f2a1a", border: "#1f6f43", text: "#cdebd8" },
+  warn:  { bg: "#2a1f0a", border: "#F59E0B", text: "#ffe6b0" },
+  info:  { bg: "#0f2030", border: "#1f6feb", text: "#cce0ff" },
+};
+
+let _container = null;
+
+function ensureContainer() {
+  if (_container) return _container;
+  _container = document.createElement("div");
+  _container.id = "toast-stack";
+  Object.assign(_container.style, {
+    position: "fixed",
+    right: "16px",
+    bottom: "16px",
+    display: "flex",
+    flexDirection: "column",
+    gap: "8px",
+    zIndex: "9999",
+    pointerEvents: "none",
+    maxWidth: "420px",
+  });
+  document.body.appendChild(_container);
+  return _container;
+}
+
+export function toast({ kind = "error", text = "", ms = 4000 } = {}) {
+  if (!text) return;
+  const colors = KIND_COLORS[kind] || KIND_COLORS.info;
+  const el = document.createElement("div");
+  Object.assign(el.style, {
+    background: colors.bg,
+    border: `1px solid ${colors.border}`,
+    color: colors.text,
+    padding: "10px 12px",
+    borderRadius: "10px",
+    fontSize: "13px",
+    boxShadow: "0 4px 12px rgba(0,0,0,.4)",
+    pointerEvents: "auto",
+    cursor: "pointer",
+    transform: "translateX(120%)",
+    transition: "transform .25s ease, opacity .25s ease",
+    opacity: "0",
+    wordBreak: "break-word",
+    overflowWrap: "anywhere",
+  });
+  el.textContent = String(text);
+
+  const c = ensureContainer();
+  c.appendChild(el);
+
+  // Animar entrada
+  requestAnimationFrame(() => {
+    el.style.transform = "translateX(0)";
+    el.style.opacity = "1";
+  });
+
+  const dismiss = () => {
+    el.style.transform = "translateX(120%)";
+    el.style.opacity = "0";
+    setTimeout(() => el.remove(), 280);
+  };
+  el.addEventListener("click", dismiss);
+  setTimeout(dismiss, Math.max(800, ms));
+}
+
+export function toastError(text) { toast({ kind: "error", text }); }
+export function toastOk(text)    { toast({ kind: "ok",    text, ms: 2500 }); }
+export function toastWarn(text)  { toast({ kind: "warn",  text }); }

public/main.js

@@ -81,7 +81,7 @@ async function processMessage({ chat_id, from, text }) {
   // Minimal simulated LLM output (replace later)
   const plan = {
     reply: `Recibido: "${text}". ¿Querés retiro o envío?`,
-    next_state: "BUILDING_ORDER",
+    next_state: "CART",
     intent: "create_order",
     missing_fields: ["delivery_or_pickup"],
     order_action: "none",

public/styles/theme.css

@@ -0,0 +1,74 @@
+/**
+ * Tema global (CSS custom properties).
+ *
+ * Las custom properties heredan a través del shadow DOM, así que cualquier
+ * componente puede usar `var(--bg)` sin re-declarar nada.
+ */
+:root {
+  /* Surfaces */
+  --bg:           #0b0f14;
+  --panel:        #121823;
+  --panel-2:      #0f1520;
+  --panel-3:      #0a0e15;
+
+  /* Borders */
+  --border:       #1e2a3a;
+  --border-hi:    #253245;
+  --border-active:#1f6feb;
+
+  /* Text */
+  --text:         #e7eef7;
+  --text-muted:   #8aa0b5;
+  --text-dim:     #d7e2ef;
+  --text-on-acc:  #ffffff;
+
+  /* Accents */
+  --accent:       #1f6feb;
+  --accent-hover: #2570f0;
+  --ok:           #25D366;
+  --warn:         #F59E0B;
+  --err:          #e74c3c;
+
+  /* Bubbles */
+  --user-bubble:  #0f2a1a;
+  --user-border:  #1f6f43;
+  --user-meta:    #b9d9c6;
+  --user-name:    #cdebd8;
+
+  --bot-bubble:   #111b2a;
+  --bot-border:   #2a3a55;
+  --bot-meta:     #a9bed6;
+  --bot-name:     #c7d8ee;
+
+  --err-bubble:   #241214;
+  --err-border:   #e74c3c;
+  --err-meta:     #ffd0d4;
+  --err-name:     #ffd0d4;
+
+  /* Charts (alias para componentes que aún usan literales) */
+  --chart-blue:   #3b82f6;
+  --chart-green:  #25D366;
+  --chart-purple: #8B5CF6;
+  --chart-orange: #F59E0B;
+  --chart-pink:   #EC4899;
+  --chart-gray:   #9CA3AF;
+
+  /* Radii / shadows */
+  --r-sm: 6px;
+  --r-md: 8px;
+  --r-lg: 10px;
+  --r-xl: 14px;
+  --shadow-bubble: 0 1px 0 rgba(0,0,0,.35);
+}
+
+/* Compat: alias antiguo `--muted` que ya usa ops-shell.js. */
+:root {
+  --muted: var(--text-muted);
+}
+
+html, body {
+  background: var(--bg);
+  color: var(--text);
+  margin: 0;
+  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
+}