diff --git a/app/api/ollama/pull/route.ts b/app/api/ollama/pull/route.ts
index 9bf743e..984d9e3 100644
--- a/app/api/ollama/pull/route.ts
+++ b/app/api/ollama/pull/route.ts
@@ -1,5 +1,7 @@
 import { NextRequest } from "next/server";
 import { pullModel, ensureOllamaAvailable } from "@/lib/ollama";
+import { getCatalogModels } from "@/lib/catalog";
+import { addSavedRemoteModel } from "@/lib/user-remote-models";
 
 export const dynamic = "force-dynamic";
 
@@ -26,6 +28,11 @@ export async function POST(req: NextRequest) {
             return;
           }
 
+          // Buscar metadados do catálogo para melhorar mensagens de erro
+          const baseName = String(model).split(":")[0];
+          const catalog = await getCatalogModels();
+          const catalogEntry = catalog.find((m) => m.name === baseName);
+
           const response = await pullModel(model);
 
           for await (const chunk of response) {
@@ -34,18 +41,59 @@ export async function POST(req: NextRequest) {
             );
           }
 
+          // Persistir referência do modelo baixado para reutilização futura
+          try {
+            await addSavedRemoteModel({ name: String(model), installed: true });
+          } catch {}
+
           controller.enqueue(
             new TextEncoder().encode(
               JSON.stringify({ status: "success" }) + "\n",
             ),
           );
           controller.close();
-        } catch (error) {
+        } catch (error: any) {
           console.error("Pull streaming error:", error);
+          const message = typeof error?.message === "string" ? error.message : "Failed to pull model";
+          const baseName = String(model).split(":")[0];
+          let hint: string | undefined;
+
+          // Recarregar entrada de catálogo para enriquecer erro
+          let catalogEntry: { url?: string; tags_count?: number } | undefined;
+          try {
+            const catalog = await getCatalogModels();
+            catalogEntry = catalog.find((m) => m.name === baseName);
+          } catch {}
+
+          // Heurísticas: manifest não encontrado → provavelmente falta tag válida
+          if (/manifest/i.test(message) || /does not exist/i.test(message)) {
+            hint = "Modelo/tag não encontrado no registro. Selecione uma tag válida ou verifique a página do modelo.";
+          }
+
+          const payload: Record<string, unknown> = {
+            error: "Failed to pull model",
+            detail: message,
+            model,
+            name: baseName,
+          };
+
+          // Anexar URL do catálogo quando disponível
+          if (catalogEntry?.url) {
+            payload.url = catalogEntry.url;
+          }
+
+          // Se usuário não especificou tag (sem ":") e sabemos que há múltiplas tags
+          if (!String(model).includes(":") && typeof catalogEntry?.tags_count === "number") {
+            payload.tags_count = catalogEntry.tags_count;
+            if (!hint && catalogEntry.tags_count > 0) {
+              hint = "Este modelo pode não ter a tag 'latest'. Escolha uma tag específica.";
+            }
+          }
+
+          if (hint) payload.hint = hint;
+
           controller.enqueue(
-            new TextEncoder().encode(
-              JSON.stringify({ error: "Failed to pull model" }) + "\n",
-            ),
+            new TextEncoder().encode(JSON.stringify(payload) + "\n"),
           );
           controller.close();
         }
diff --git a/app/api/ollama/search/route.ts b/app/api/ollama/search/route.ts
index 302e1d3..c1f6574 100644
--- a/app/api/ollama/search/route.ts
+++ b/app/api/ollama/search/route.ts
@@ -1,17 +1,27 @@
 import { NextRequest, NextResponse } from "next/server";
-import { searchRemoteModels } from "@/lib/ollama";
+import { getSavedRemoteModels } from "@/lib/user-remote-models";
 
 export async function GET(request: NextRequest) {
   try {
     const { searchParams } = new URL(request.url);
     const query = searchParams.get("q") || undefined;
 
-    const remoteModels = await searchRemoteModels(query);
+    const saved = await getSavedRemoteModels();
+    const q = (query || "").trim().toLowerCase();
+    const filtered = q
+      ? saved.filter((m) => m.name.toLowerCase().includes(q))
+      : saved;
 
-    return NextResponse.json({
-      success: true,
-      models: remoteModels,
-    });
+    const models = filtered.map((m) => ({
+      name: m.name,
+      description: m.description,
+      url: m.url,
+      tags_count: m.tags_count,
+      installed: m.installed === true,
+      remote: true,
+    }));
+
+    return NextResponse.json({ success: true, models });
   } catch (error) {
     console.error("Error searching remote models:", error);
     return NextResponse.json(
diff --git a/app/api/ollama/tags/route.ts b/app/api/ollama/tags/route.ts
new file mode 100644
index 0000000..ab3de1b
--- /dev/null
+++ b/app/api/ollama/tags/route.ts
@@ -0,0 +1,74 @@
+import { NextRequest, NextResponse } from "next/server";
+import { getCatalogModels } from "@/lib/catalog";
+
+// Cache simples em memória para evitar múltiplos scrapes por nome
+const TAGS_CACHE = new Map<string, { tags: string[]; expiresAt: number }>();
+const CACHE_TTL_MS = 60 * 60 * 1000; // 1h
+
+async function fetchTagsFromPage(url: string): Promise<string[]> {
+  try {
+    const res = await fetch(url, { cache: "no-store" });
+    if (!res.ok) return [];
+    const html = await res.text();
+
+    // Heurística best-effort: procurar padrões de tag na página
+    // Exemplos possíveis: ":7b", ":8b", ":q4_K_S", etc.
+    // Evitar listas enormes ou falsas-positivas: limitar tamanho e caracteres
+    const tagRegex = /:\s*([A-Za-z0-9._-]{1,32})/g;
+    const found = new Set<string>();
+    let match: RegExpExecArray | null;
+    while ((match = tagRegex.exec(html)) !== null) {
+      const tag = match[1];
+      if (tag && !/^(http|https)$/i.test(tag)) {
+        found.add(tag);
+      }
+    }
+
+    // Retornar até 50 tags para não sobrecarregar UI
+    return Array.from(found).slice(0, 50);
+  } catch {
+    return [];
+  }
+}
+
+export async function GET(request: NextRequest) {
+  try {
+    const { searchParams } = new URL(request.url);
+    const name = (searchParams.get("name") || "").trim();
+    if (!name) {
+      return NextResponse.json(
+        { error: "Missing name" },
+        { status: 400 },
+      );
+    }
+
+    // Cache
+    const cached = TAGS_CACHE.get(name);
+    const now = Date.now();
+    if (cached && cached.expiresAt > now) {
+      return NextResponse.json({ success: true, name, tags: cached.tags });
+    }
+
+    const catalog = await getCatalogModels();
+    const entry = catalog.find((m) => m.name === name);
+    const url = entry?.url;
+
+    // Sem URL conhecida → não conseguimos buscar tags no registro
+    if (!url) {
+      TAGS_CACHE.set(name, { tags: [], expiresAt: now + CACHE_TTL_MS });
+      return NextResponse.json({ success: true, name, tags: [] });
+    }
+
+    const tags = await fetchTagsFromPage(url);
+    TAGS_CACHE.set(name, { tags, expiresAt: now + CACHE_TTL_MS });
+    return NextResponse.json({ success: true, name, url, tags });
+  } catch (error) {
+    console.error("Error fetching model tags:", error);
+    return NextResponse.json(
+      { error: "Failed to fetch tags" },
+      { status: 500 },
+    );
+  }
+}
+
+
diff --git a/app/api/system/status/route.ts b/app/api/system/status/route.ts
new file mode 100644
index 0000000..1251693
--- /dev/null
+++ b/app/api/system/status/route.ts
@@ -0,0 +1,108 @@
+import { NextResponse } from "next/server";
+import os from "os";
+
+export async function GET() {
+  try {
+    const totalMem = os.totalmem();
+    const freeMem = os.freemem();
+    const usedMem = totalMem - freeMem;
+    const load = os.loadavg();
+    const memUsage = process.memoryUsage();
+
+    // Base com os/fallback
+    const baseInfo: any = {
+      os: {
+        platform: os.platform(),
+        arch: os.arch(),
+        release: os.release(),
+        uptimeSec: os.uptime(),
+      },
+      cpu: {
+        model: os.cpus()?.[0]?.model || "unknown",
+        cores: os.cpus()?.length || 0,
+        speed: os.cpus()?.[0]?.speed || 0,
+      },
+      memory: {
+        total: totalMem,
+        free: freeMem,
+        used: usedMem,
+        modules: [] as Array<{ size: number; clockSpeed?: number; type?: string }>,
+      },
+      gpus: [] as Array<{ index: number; name: string; vendor?: string; vramMB?: number; bus?: string }>,
+      metrics: {
+        loadAvg: { "1m": load[0] ?? 0, "5m": load[1] ?? 0, "15m": load[2] ?? 0 },
+        process: {
+          rss: memUsage.rss,
+          heapUsed: memUsage.heapUsed,
+          heapTotal: memUsage.heapTotal,
+          external: memUsage.external,
+        },
+      },
+    };
+
+    // Tentar usar systeminformation, se disponível
+    try {
+      // Import dinâmico sem acionar o bundler (evita Module not found)
+      // eslint-disable-next-line @typescript-eslint/no-implied-eval
+      const dynImport: (m: string) => Promise<any> = new Function(
+        "m",
+        "return import(m)"
+      ) as any;
+      const si = await dynImport("systeminformation");
+
+      const [cpu, osInfo, memLayout, graphics, currentLoad] = await Promise.all([
+        si.cpu(),
+        si.osInfo(),
+        si.memLayout(),
+        si.graphics(),
+        si.currentLoad(),
+      ]);
+
+      baseInfo.os = {
+        platform: osInfo.platform || baseInfo.os.platform,
+        arch: os.arch(),
+        release: osInfo.release || baseInfo.os.release,
+        uptimeSec: baseInfo.os.uptimeSec,
+        distro: osInfo.distro,
+      };
+      baseInfo.cpu = {
+        model: cpu.brand || baseInfo.cpu.model,
+        cores: cpu.cores || baseInfo.cpu.cores,
+        physicalCores: cpu.physicalCores,
+        speed: Number(cpu.speed) || baseInfo.cpu.speed,
+      };
+      baseInfo.memory.modules = (memLayout || []).map((m: any) => ({ size: m.size, clockSpeed: m.clockSpeed, type: m.type }));
+      baseInfo.gpus = (graphics?.controllers || []).map((c: any, idx: number) => ({ index: idx, name: c.model || c.vendor || "GPU", vendor: c.vendor, vramMB: c.vram, bus: c.bus }));
+      baseInfo.metrics.loadAvg = {
+        "1m": currentLoad?.avgload ?? baseInfo.metrics.loadAvg["1m"],
+        "5m": baseInfo.metrics.loadAvg["5m"],
+        "15m": baseInfo.metrics.loadAvg["15m"],
+      };
+    } catch {
+      // sem systeminformation, seguimos com fallback
+    }
+
+    // Fallback adicional para detectar GPUs no Windows via PowerShell
+    try {
+      if ((!baseInfo.gpus || baseInfo.gpus.length === 0) && (baseInfo.os.platform === "win32" || os.platform() === "win32")) {
+        const { execFileSync } = await import("child_process");
+        const out = execFileSync("powershell", [
+          "-NoProfile",
+          "-Command",
+          "Get-CimInstance Win32_VideoController | Select-Object Name,AdapterRAM,PNPDeviceID | ConvertTo-Json -Depth 3"
+        ], { encoding: "utf8", timeout: 2000 });
+        const parsed = JSON.parse(out);
+        const arr = Array.isArray(parsed) ? parsed : [parsed];
+        baseInfo.gpus = arr.map((g: any, idx: number) => ({ index: idx, name: g.Name || "GPU", vendor: undefined, vramMB: g.AdapterRAM ? Math.round(g.AdapterRAM / 1024 / 1024) : undefined, bus: g.PNPDeviceID }));
+      }
+    } catch {
+      // ignore fallback errors
+    }
+
+    return NextResponse.json({ success: true, info: baseInfo });
+  } catch (e) {
+    return NextResponse.json({ success: false, error: String(e) }, { status: 500 });
+  }
+}
+
+
diff --git a/components/ClientHome.tsx b/components/ClientHome.tsx
index 510c44e..0339a16 100644
--- a/components/ClientHome.tsx
+++ b/components/ClientHome.tsx
@@ -8,7 +8,6 @@ import {
   SettingsButton,
   SettingsModal,
 } from "@/components/settings/SettingsModal";
-import { MCPManualInstallModal } from "@/components/mcp/MCPManualInstallModal";
 import { Store } from "lucide-react";
 
 interface ClientHomeProps {
@@ -22,7 +21,7 @@ export function ClientHome({ offline, models }: ClientHomeProps) {
   const [currentConversationId, setCurrentConversationId] = useState<
     string | null
   >(null);
-  const [showManualInstall, setShowManualInstall] = useState(false);
+  
 
   const handleConversationCreated = () => {
     // Incrementar trigger para forçar atualização da sidebar
@@ -48,13 +47,6 @@ export function ClientHome({ offline, models }: ClientHomeProps) {
                 Ollama offline
               </span>
             )}
-            <button
-              onClick={() => setShowManualInstall(true)}
-              className="flex items-center gap-2 px-3 py-2 bg-[var(--surface)] border border-[var(--border)] rounded-md hover:bg-[var(--background)] transition-colors text-sm"
-            >
-              <Store className="h-4 w-4" />
-              Install MCP Manually
-            </button>
             <SettingsButton onOpen={() => setOpen(true)} />
             <ModeToggle />
           </div>
@@ -77,10 +69,7 @@ export function ClientHome({ offline, models }: ClientHomeProps) {
         </div>
       </main>
       <SettingsModal isOpen={open} onClose={() => setOpen(false)} />
-      <MCPManualInstallModal
-        isOpen={showManualInstall}
-        onClose={() => setShowManualInstall(false)}
-      />
+      
     </div>
   );
 }
diff --git a/components/chat/ChatContainer.tsx b/components/chat/ChatContainer.tsx
index 0fc0211..3c44149 100644
--- a/components/chat/ChatContainer.tsx
+++ b/components/chat/ChatContainer.tsx
@@ -4,8 +4,9 @@ import { useState, useEffect, useRef, useCallback } from "react";
 import { ModelDropdown } from "@/components/model/ModelDropdown";
 import { ModelPullDialog } from "@/components/model/ModelPullDialog";
 import { ChatMessage } from "@/components/chat/ChatMessage";
-import { SettingsModal } from "@/components/chat/SettingsModal";
+// Settings are controlled globally in header
 import { MCPSelector, ActiveMCPBadges } from "@/components/chat/MCPSelector";
+import { MCPManualInstallModal } from "@/components/mcp/MCPManualInstallModal";
 import { Send, Square } from "lucide-react";
 import type { ModelInfo } from "@/lib/models";
 import type { Message } from "@/lib/chat";
@@ -37,6 +38,11 @@ export function ChatContainer({
   const [modelToPull, setModelToPull] = useState<string>("");
   const [systemPrompt, setSystemPrompt] = useState<string>("");
   const messagesEndRef = useRef<HTMLDivElement>(null);
+  const inputRef = useRef<HTMLTextAreaElement>(null);
+  const [showManualInstall, setShowManualInstall] = useState(false);
+  const [showCommandMenu, setShowCommandMenu] = useState(false);
+  const [commandQuery, setCommandQuery] = useState("");
+  const [highlightedCmd, setHighlightedCmd] = useState(0);
 
   // Estado para MCPs ativos
   const [activeMcps, setActiveMcps] = useState<string[]>([]);
@@ -141,6 +147,16 @@ export function ChatContainer({
     scrollToBottom();
   }, [messages, streamingContent]);
 
+  // Auto-expansão do textarea conforme o usuário digita
+  useEffect(() => {
+    if (inputRef.current) {
+      const el = inputRef.current;
+      el.style.height = "auto";
+      const maxPx = 160; // ~10rem
+      el.style.height = `${Math.min(el.scrollHeight, maxPx)}px`;
+    }
+  }, [inputContent]);
+
   const loadConversation = async (id: string) => {
     try {
       const response = await fetch(`/api/conversations/${id}`);
@@ -331,15 +347,59 @@ export function ChatContainer({
     }
   };
 
+  // Parse de comando no submit
+  const tryHandleSlashCommand = (text: string): boolean => {
+    if (!text.startsWith("/")) return false;
+    const [cmd, ...rest] = text.trim().split(/\s+/);
+    if (cmd === "/clear") {
+      startNewConversation();
+      setInputContent("");
+      return true;
+    }
+    if (cmd === "/model") {
+      const newModel = rest.join(" ");
+      if (newModel) {
+        handleSelectModel(newModel);
+        setInputContent("");
+      }
+      return true;
+    }
+    return false;
+  };
+
   const handleSubmit = (e: React.FormEvent) => {
     e.preventDefault();
     if (inputContent.trim() && !isStreaming) {
+      if (tryHandleSlashCommand(inputContent.trim())) return;
       handleSendMessage(inputContent.trim());
       setInputContent("");
     }
   };
 
   const handleKeyDown = (e: React.KeyboardEvent) => {
+    if (showCommandMenu) {
+      const commands = filteredCommands;
+      if (e.key === "ArrowDown") {
+        e.preventDefault();
+        setHighlightedCmd((h) => (commands.length ? (h + 1) % commands.length : 0));
+        return;
+      }
+      if (e.key === "ArrowUp") {
+        e.preventDefault();
+        setHighlightedCmd((h) => (commands.length ? (h - 1 + commands.length) % commands.length : 0));
+        return;
+      }
+      if (e.key === "Escape") {
+        setShowCommandMenu(false);
+        return;
+      }
+      if (e.key === "Enter") {
+        e.preventDefault();
+        const cmd = commands[highlightedCmd] || commands[0];
+        if (cmd) executeCommand(cmd);
+        return;
+      }
+    }
     if (e.key === "Enter" && !e.shiftKey) {
       e.preventDefault();
       handleSubmit(e);
@@ -357,6 +417,110 @@ export function ChatContainer({
     update({ systemPrompt: prompt }); // Salvar no SQLite
   };
 
+  // Regenerar última resposta do assistente
+  const handleRegenerate = async () => {
+    if (isStreaming || messages.length === 0 || !selectedModel) return;
+    const lastUserIndex = [...messages].map((m) => m.role).lastIndexOf("user");
+    if (lastUserIndex === -1) return;
+    const baseMessages = messages.slice(0, lastUserIndex + 1);
+    setMessages(baseMessages);
+    setIsStreaming(true);
+    setStreamingContent("");
+    try {
+      const options = buildOllamaOptions(
+        prefs.device,
+        prefs.numGpu,
+        prefs.gpuIndex
+      );
+      abortRef.current = new AbortController();
+      const response = await fetch("/api/ollama/chat", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({
+          model: selectedModel,
+          messages: baseMessages,
+          options,
+          system: systemPrompt || undefined,
+          activeMcps: activeMcps.length > 0 ? activeMcps : undefined,
+        }),
+        signal: abortRef.current.signal,
+      });
+      if (!response.ok) throw new Error("Failed to regenerate");
+      const reader = response.body?.getReader();
+      if (!reader) throw new Error("No response body");
+      const decoder = new TextDecoder();
+      let buffer = "";
+      let assistantContent = "";
+      while (true) {
+        const { done, value } = await reader.read();
+        if (done) break;
+        buffer += decoder.decode(value, { stream: true });
+        const lines = buffer.split("\n");
+        buffer = lines.pop() || "";
+        for (const line of lines) {
+          if (!line.trim()) continue;
+          try {
+            const data = JSON.parse(line);
+            if (data.clearPrevious) {
+              assistantContent = "";
+              setStreamingContent("");
+            }
+            if (data.token) {
+              assistantContent += data.token;
+              setStreamingContent(assistantContent);
+            }
+            if (data.done) {
+              const assistantMessage = createMessage("assistant", assistantContent);
+              setMessages((prev) => [...prev, assistantMessage]);
+              setStreamingContent("");
+              if (conversationId) {
+                try {
+                  await fetch(`/api/conversations/${conversationId}/messages`, {
+                    method: "POST",
+                    headers: { "Content-Type": "application/json" },
+                    body: JSON.stringify({ role: "assistant", content: assistantContent }),
+                  });
+                } catch {}
+              }
+            }
+            if (data.error) throw new Error(data.error);
+          } catch (e) {
+            console.error("Error parsing stream:", e);
+          }
+        }
+      }
+    } catch (error) {
+      console.error("Regenerate error:", error);
+    } finally {
+      setIsStreaming(false);
+      setStreamingContent("");
+      abortRef.current = null;
+    }
+  };
+
+  // Comandos do chat
+  type ChatCommand = { id: string; label: string; hint?: string };
+  const availableCommands: ChatCommand[] = [
+    { id: "clear", label: "/clear", hint: "Limpar o histórico atual" },
+    { id: "model", label: "/model <id>", hint: "Trocar de modelo ativo" },
+  ];
+  const filteredCommands = availableCommands.filter((c) =>
+    c.label.toLowerCase().includes(commandQuery.toLowerCase())
+  );
+  const executeCommand = (cmd: ChatCommand) => {
+    if (cmd.id === "clear") {
+      startNewConversation();
+      setInputContent("");
+      setShowCommandMenu(false);
+      return;
+    }
+    if (cmd.id === "model") {
+      setInputContent("/model ");
+      setTimeout(() => inputRef.current?.focus(), 0);
+      return;
+    }
+  };
+
   const handleSelectModel = (modelId: string) => {
     const model = models.find((m) => m.id === modelId);
     if (model) {
@@ -420,6 +584,11 @@ export function ChatContainer({
             if (data.status === "success") {
               // Model pulled successfully, refresh models list
               window.location.reload();
+            } else if (data.error) {
+              // Mostrar erro amigável quando backend identifica problema com tag/manifest
+              const hint = data.hint ? `\nHint: ${data.hint}` : "";
+              const url = data.url ? `\nPágina do modelo: ${data.url}` : "";
+              alert(`Falha ao baixar o modelo: ${data.detail || data.error}${hint}${url}`);
             }
           } catch (e) {
             console.error("Error parsing pull stream:", e);
@@ -431,6 +600,12 @@ export function ChatContainer({
     }
   };
 
+  // Abrir diálogo de instalação (seleção/edição de tag)
+  const openPullDialog = (name: string) => {
+    setModelToPull(name);
+    setShowPullDialog(true);
+  };
+
   const selectedModelData = models.find((m) => m.id === selectedModel);
 
   return (
@@ -446,17 +621,18 @@ export function ChatContainer({
             selectedModel={selectedModel}
             onSelectModel={handleSelectModel}
             onDeleteModel={handleDeleteModel}
-            onPullModel={handlePullModel}
+            onPullModel={openPullDialog}
             disabled={isStreaming}
           />
         </div>
         <div className="flex items-center gap-2">
-          <SettingsModal
-            systemPrompt={systemPrompt}
-            onSystemPromptChange={handleSystemPromptChange}
-            selectedModel={selectedModel}
-            models={models}
-          />
+          <button
+            onClick={handleRegenerate}
+            disabled={isStreaming || messages.length === 0}
+            className="rounded-md border border-[var(--border)] px-3 py-1 text-sm hover:bg-[var(--surface)] disabled:opacity-50"
+          >
+            Regenerar
+          </button>
           <button
             onClick={handleStop}
             disabled={!isStreaming}
@@ -469,73 +645,145 @@ export function ChatContainer({
 
       {/* Messages */}
       <div className="flex-1 overflow-y-auto min-h-0">
-        {messages.length === 0 ? (
-          <div className="flex h-full items-center justify-center">
-            <div className="text-center text-[var(--foreground)]/60">
-              <p className="text-lg mb-2">Welcome to Ollahub</p>
-              <p className="text-sm">Select a model and start chatting!</p>
+        <div className={`mx-auto w-full ${
+          (prefs.chatLayout ?? "compact") === "edge" ? "max-w-full px-2" : "max-w-3xl px-4"
+        }`}>
+          {messages.length === 0 ? (
+            <div className="flex h-full items-center justify-center py-16">
+              <div className="text-center text-[var(--foreground)]/70">
+                <p className="text-xl font-medium mb-1">Bem-vindo ao Ollahub</p>
+                <p className="text-sm">Selecione um modelo e comece a conversar.</p>
+              </div>
             </div>
-          </div>
-        ) : (
-          <>
-            {messages.map((message) => (
-              <ChatMessage key={message.id} message={message} />
-            ))}
-            {isStreaming && streamingContent && (
-              <ChatMessage
-                message={createMessage("assistant", streamingContent)}
-                isStreaming={true}
-              />
-            )}
-            <div ref={messagesEndRef} />
-          </>
-        )}
+          ) : (
+            <>
+              {messages.map((message) => (
+                <ChatMessage key={message.id} message={message} bubbleSize={prefs.bubbleSize ?? "md"} />
+              ))}
+              {isStreaming && streamingContent && (
+                <ChatMessage
+                  message={createMessage("assistant", streamingContent)}
+                  isStreaming={true}
+                  bubbleSize={prefs.bubbleSize ?? "md"}
+                />
+              )}
+              <div ref={messagesEndRef} />
+            </>
+          )}
+        </div>
       </div>
 
       {/* Input */}
-      <div className="flex-shrink-0 border-t border-[var(--border)] bg-[var(--background)]">
+      <div className="flex-shrink-0 border-t border-[var(--border)] sticky bottom-0 z-10 bg-[color-mix(in_oklab,var(--background),black_2%)]/80 backdrop-blur supports-[backdrop-filter]:bg-[color-mix(in_oklab,var(--background),black_2%)]/60">
         <form onSubmit={handleSubmit} className="p-4">
-          {/* Active MCP Badges */}
-          <ActiveMCPBadges
-            activeMcps={activeMcps}
-            mcpNames={mcpNames}
-            onRemove={handleRemoveMCP}
-          />
-
-          <div className="flex gap-2">
-            {/* MCP Selector */}
-            <MCPSelector
+          <div className="mx-auto w-full max-w-3xl">
+            {/* Active MCP Badges */}
+            <ActiveMCPBadges
               activeMcps={activeMcps}
-              onToggleMCP={handleToggleMCP}
-              onClearAll={handleClearAllMCPs}
+              mcpNames={mcpNames}
+              onRemove={handleRemoveMCP}
             />
 
-            <textarea
-              value={inputContent}
-              onChange={(e) => setInputContent(e.target.value)}
-              onKeyDown={handleKeyDown}
-              placeholder={
-                selectedModel ? "Type a message..." : "Select a model first..."
-              }
-              disabled={!selectedModel || isStreaming}
-              className="flex-1 resize-none rounded-lg border border-[var(--border)] bg-[var(--background)] px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-[var(--accent)] disabled:opacity-50"
-              rows={1}
-              maxLength={2000}
-            />
-            <button
-              type={isStreaming ? "button" : "submit"}
-              onClick={isStreaming ? handleStop : undefined}
-              disabled={
-                isStreaming ? false : !inputContent.trim() || !selectedModel
-              }
-              className="flex h-10 w-10 items-center justify-center rounded-lg bg-[var(--accent)] text-white transition-colors hover:bg-[color-mix(in_oklab,var(--accent),black_10%)] disabled:opacity-50"
-            >
-              {isStreaming ? (
-                <Square className="h-4 w-4" />
-              ) : (
-                <Send className="h-4 w-4" />
+            <div className="rounded-xl border border-[var(--border)] bg-[var(--surface)]/60 shadow-sm transition-all focus-within:ring-2 focus-within:ring-[var(--accent)] relative">
+              <div className="flex gap-2 p-2">
+                {/* MCP Selector */}
+                <MCPSelector
+                  activeMcps={activeMcps}
+                  onToggleMCP={handleToggleMCP}
+                  onClearAll={handleClearAllMCPs}
+                onOpenInstallModal={() => setShowManualInstall(true)}
+                />
+
+                <textarea
+                  ref={inputRef}
+                  value={inputContent}
+                  onChange={(e) => {
+                    const val = e.target.value;
+                    setInputContent(val);
+                    if (val.startsWith("/")) {
+                      setShowCommandMenu(true);
+                      const q = val.slice(1).trim();
+                      setCommandQuery(q);
+                      setHighlightedCmd(0);
+                    } else {
+                      setShowCommandMenu(false);
+                    }
+                  }}
+                  onKeyDown={handleKeyDown}
+                  placeholder={
+                    selectedModel ? "Digite uma mensagem..." : "Selecione um modelo primeiro..."
+                  }
+                  disabled={!selectedModel || isStreaming}
+                  className="flex-1 resize-none rounded-lg border-none bg-transparent px-3 py-3 text-sm focus:outline-none disabled:opacity-50 max-h-40 overflow-y-auto"
+                  rows={1}
+                  
+                />
+                <button
+                  type={isStreaming ? "button" : "submit"}
+                  onClick={isStreaming ? handleStop : undefined}
+                  disabled={
+                    isStreaming ? false : !inputContent.trim() || !selectedModel
+                  }
+                  className="flex h-10 w-10 my-auto items-center justify-center rounded-lg bg-[var(--accent)] text-white transition-colors hover:bg-[color-mix(in_oklab,var(--accent),black_10%)] disabled:opacity-50"
+                >
+                  {isStreaming ? (
+                    <Square className="h-4 w-4" />
+                  ) : (
+                    <Send className="h-4 w-4" />
+                  )}
+                </button>
+              </div>
+              <div className="flex items-center gap-2 px-3 pb-2 pt-0 text-xs text-[var(--foreground)]/60">
+                <button
+                  type="button"
+                  onClick={() => navigator.clipboard.writeText(inputContent).catch(() => {})}
+                  className="px-2 py-1 rounded hover:bg-[var(--surface)]"
+                >
+                  Copiar
+                </button>
+                <button
+                  type="button"
+                  onClick={() => setInputContent("")}
+                  className="px-2 py-1 rounded hover:bg-[var(--surface)]"
+                >
+                  Limpar
+                </button>
+                <button
+                  type="button"
+                  onClick={() => {
+                    setInputContent("/");
+                    setShowCommandMenu(true);
+                    setCommandQuery("");
+                    setHighlightedCmd(0);
+                    setTimeout(() => inputRef.current?.focus(), 0);
+                  }}
+                  className="px-2 py-1 rounded hover:bg-[var(--surface)]"
+                >
+                  Comandos
+                </button>
+                <span className="ml-auto">{selectedModel ? "" : "Selecione um modelo para começar"}</span>
+              </div>
+
+              {showCommandMenu && filteredCommands.length > 0 && (
+                <div className="absolute left-2 right-2 bottom-14 rounded-md border border-[var(--border)] bg-[var(--background)] shadow-md overflow-hidden">
+                  {filteredCommands.map((cmd, idx) => (
+                    <button
+                      key={cmd.id + idx}
+                      type="button"
+                      onClick={() => executeCommand(cmd)}
+                      className={`w-full text-left px-3 py-2 text-sm hover:bg-[var(--surface)] ${
+                        idx === highlightedCmd ? "bg-[var(--surface)]" : ""
+                      }`}
+                    >
+                      <div className="font-medium">{cmd.label}</div>
+                      {cmd.hint && (
+                        <div className="text-[10px] opacity-70">{cmd.hint}</div>
+                      )}
+                    </button>
+                  ))}
+                </div>
               )}
-            </button>
+            </div>
           </div>
         </form>
       </div>
@@ -547,6 +795,14 @@ export function ChatContainer({
         modelName={modelToPull}
         onConfirmPull={handlePullModel}
       />
+      <MCPManualInstallModal
+        isOpen={showManualInstall}
+        onClose={() => setShowManualInstall(false)}
+        onSuccess={() => {
+          // Fechar e opcionalmente poderíamos sinalizar o MCPSelector a recarregar.
+          setShowManualInstall(false);
+        }}
+      />
     </div>
   );
 }
diff --git a/components/chat/ChatMessage.tsx b/components/chat/ChatMessage.tsx
index 61c92d1..f56c6b7 100644
--- a/components/chat/ChatMessage.tsx
+++ b/components/chat/ChatMessage.tsx
@@ -10,13 +10,21 @@ import { formatTimestamp } from "@/lib/chat";
 interface ChatMessageProps {
   message: Message;
   isStreaming?: boolean;
+  bubbleSize?: "sm" | "md" | "lg";
 }
 
 export function ChatMessage({
   message,
   isStreaming = false,
+  bubbleSize = "md",
 }: ChatMessageProps) {
   const isUser = message.role === "user";
+  const sizeClass =
+    bubbleSize === "sm"
+      ? "px-3 py-1.5 text-sm"
+      : bubbleSize === "lg"
+      ? "px-5 py-3 text-base"
+      : "px-4 py-2 text-sm";
 
   return (
     <div
@@ -28,7 +36,7 @@ export function ChatMessage({
         </div>
       )}
       <div
-        className={`max-w-[80%] relative rounded-lg px-4 py-2 ${
+        className={`max-w-[85%] md:max-w-[80%] relative rounded-lg ${sizeClass} shadow-sm ${
           isUser
             ? "bg-[var(--accent)] text-white"
             : "bg-[var(--surface)] text-[var(--foreground)]"
@@ -43,7 +51,7 @@ export function ChatMessage({
         </div>
         {isStreaming && <span className="ml-1 animate-pulse">▊</span>}
         {!isUser && !isStreaming && (
-          <div className="absolute bottom-2 right-2">
+          <div className="absolute bottom-2 right-2 z-10 pointer-events-auto">
             <MessageActions content={message.content} />
           </div>
         )}
@@ -122,7 +130,7 @@ export function ChatInput({
         disabled={disabled}
         className="flex-1 resize-none rounded-lg border border-[var(--border)] bg-[var(--background)] px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-[var(--accent)] disabled:opacity-50"
         rows={1}
-        maxLength={2000}
+        
       />
       <button
         type={isStreaming ? "button" : "submit"}
diff --git a/components/chat/ConversationSidebar.tsx b/components/chat/ConversationSidebar.tsx
index ecd8c03..3341216 100644
--- a/components/chat/ConversationSidebar.tsx
+++ b/components/chat/ConversationSidebar.tsx
@@ -25,6 +25,8 @@ export function ConversationSidebar({
 }: ConversationSidebarProps) {
   const [conversations, setConversations] = useState<Conversation[]>([]);
   const [loading, setLoading] = useState(true);
+  const [creating, setCreating] = useState(false);
+  const [query, setQuery] = useState("");
 
   useEffect(() => {
     loadConversations();
@@ -66,21 +68,74 @@ export function ConversationSidebar({
     }
   };
 
+  const filteredConversations = conversations.filter((c) =>
+    c.title.toLowerCase().includes(query.toLowerCase())
+  );
+
   return (
-    <div className="w-64 h-full bg-[var(--surface)] border-r border-[var(--border)] flex flex-col">
+    <div className="w-64 lg:w-72 h-full bg-[var(--surface)] border-r border-[var(--border)] flex flex-col">
       {/* Header */}
-      <div className="p-4 border-b border-[var(--border)]">
+      <div className="p-4 border-b border-[var(--border)] sticky top-0 z-10 bg-[color-mix(in_oklab,var(--surface),black_2%)]/90 backdrop-blur supports-[backdrop-filter]:bg-[color-mix(in_oklab,var(--surface),black_2%)]/70">
         <button
-          onClick={onNewConversation}
-          className="w-full flex items-center justify-center gap-2 px-4 py-2 bg-[var(--accent)] text-white rounded-lg hover:opacity-90 transition-opacity"
+          onClick={async () => {
+            if (creating) return;
+            setCreating(true);
+            try {
+              // Buscar modelo selecionado nas preferências
+              const prefsRes = await fetch("/api/preferences");
+              const prefs = await prefsRes.json();
+              const model = prefs?.selectedModel;
+              if (!model) {
+                alert("Selecione um modelo antes de criar uma conversa.");
+                return;
+              }
+
+              // Criar conversa vazia (título padrão gerado no backend)
+              const res = await fetch("/api/conversations", {
+                method: "POST",
+                headers: { "Content-Type": "application/json" },
+                body: JSON.stringify({ model }),
+              });
+              if (!res.ok) throw new Error("Falha ao criar conversa");
+              const { id, title } = await res.json();
+
+              // Inserir no topo da lista e selecionar
+              const newConv: Conversation = {
+                id,
+                title,
+                model,
+                updated_at: Date.now(),
+              };
+              setConversations((prev) => [newConv, ...prev]);
+              onSelectConversation(id);
+
+              // Notificar container para possíveis efeitos colaterais
+              onNewConversation();
+            } catch (e) {
+              console.error(e);
+              alert("Não foi possível criar a conversa.");
+            } finally {
+              setCreating(false);
+            }
+          }}
+          disabled={creating}
+          className="w-full flex items-center justify-center gap-2 px-4 py-2 bg-[var(--accent)] text-white rounded-lg hover:opacity-90 transition-opacity disabled:opacity-60"
         >
           <Plus className="h-4 w-4" />
-          Nova Conversa
+          {creating ? "Criando..." : "Nova Conversa"}
         </button>
+        <div className="mt-3">
+          <input
+            value={query}
+            onChange={(e) => setQuery(e.target.value)}
+            placeholder="Buscar conversa..."
+            className="w-full px-3 py-2 text-sm rounded-md bg-[var(--background)] border border-[var(--border)] outline-none focus:border-[var(--accent)] transition-colors"
+          />
+        </div>
       </div>
 
       {/* Lista de Conversas */}
-      <div className="flex-1 overflow-y-auto p-2">
+      <div className="flex-1 overflow-y-auto p-2 custom-scrollbar">
         {loading ? (
           <div className="text-center p-4 text-sm text-[var(--foreground)]/60">
             Carregando...
@@ -89,15 +144,19 @@ export function ConversationSidebar({
           <div className="text-center p-4 text-sm text-[var(--foreground)]/60">
             Nenhuma conversa ainda
           </div>
+        ) : filteredConversations.length === 0 ? (
+          <div className="text-center p-4 text-sm text-[var(--foreground)]/60">
+            Nenhum resultado para "{query}"
+          </div>
         ) : (
-          conversations.map((conv) => (
+          filteredConversations.map((conv) => (
             <div
               key={conv.id}
               onClick={() => onSelectConversation(conv.id)}
               className={`w-full flex items-center gap-2 p-3 rounded-lg mb-1 text-left transition-colors group cursor-pointer ${
                 currentConversationId === conv.id
-                  ? "bg-[var(--accent)]/10 text-[var(--accent)]"
-                  : "hover:bg-[var(--background)]"
+                  ? "bg-[var(--accent)]/12 text-[var(--accent)] ring-1 ring-[var(--accent)]/30"
+                  : "hover:bg-[color-mix(in_oklab,var(--surface),black_6%)]"
               }`}
             >
               <MessageSquare className="h-4 w-4 flex-shrink-0" />
diff --git a/components/chat/MCPSelector.tsx b/components/chat/MCPSelector.tsx
index 259da3d..2864451 100644
--- a/components/chat/MCPSelector.tsx
+++ b/components/chat/MCPSelector.tsx
@@ -14,16 +14,19 @@ interface MCPSelectorProps {
   activeMcps: string[];
   onToggleMCP: (mcpId: string) => void;
   onClearAll: () => void;
+  onOpenInstallModal?: () => void;
 }
 
 export function MCPSelector({
   activeMcps,
   onToggleMCP,
   onClearAll,
+  onOpenInstallModal,
 }: MCPSelectorProps) {
   const [isOpen, setIsOpen] = useState(false);
   const [availableMcps, setAvailableMcps] = useState<MCPForChat[]>([]);
   const [loading, setLoading] = useState(false);
+  const [query, setQuery] = useState("");
   const dropdownRef = useRef<HTMLDivElement>(null);
 
   // Carregar MCPs disponíveis
@@ -79,6 +82,19 @@ export function MCPSelector({
     onToggleMCP(mcpId);
   };
 
+  const filtered = availableMcps.filter((mcp) => {
+    if (!query.trim()) return true;
+    const q = query.toLowerCase();
+    return (
+      mcp.name.toLowerCase().includes(q) ||
+      mcp.tools.some(
+        (t) =>
+          t.name.toLowerCase().includes(q) ||
+          (t.description || "").toLowerCase().includes(q)
+      )
+    );
+  });
+
   return (
     <div className="relative" ref={dropdownRef}>
       {/* Button */}
@@ -89,7 +105,7 @@ export function MCPSelector({
       >
         <Plug className="h-4 w-4" />
         {activeMcps.length > 0 && (
-          <span className="flex items-center justify-center h-5 min-w-[20px] px-1.5 bg-[var(--primary)] text-[var(--primary-foreground)] text-xs font-medium rounded-full">
+          <span className="flex items-center justify-center h-5 min-w-[20px] px-1.5 bg-[var(--accent)] text-[var(--accent-foreground)] text-xs font-medium rounded-full">
             {activeMcps.length}
           </span>
         )}
@@ -102,36 +118,60 @@ export function MCPSelector({
 
       {/* Dropdown */}
       {isOpen && (
-        <div className="absolute bottom-full left-0 mb-2 w-80 bg-[var(--background)] border border-[var(--border)] rounded-lg shadow-lg z-50 max-h-96 overflow-hidden flex flex-col">
+        <div className="absolute bottom-full left-0 mb-2 w-96 bg-[var(--background)] border border-[var(--border)] rounded-lg shadow-lg z-50 max-h-[28rem] overflow-hidden flex flex-col">
           {/* Header */}
-          <div className="p-3 border-b border-[var(--border)] flex items-center justify-between">
-            <div className="flex items-center gap-2">
-              <Plug className="h-4 w-4" />
-              <span className="font-semibold text-sm">MCP Tools</span>
+          <div className="p-3 border-b border-[var(--border)] sticky top-0 bg-[color-mix(in_oklab,var(--background),black_2%)]/90 backdrop-blur supports-[backdrop-filter]:bg-[color-mix(in_oklab,var(--background),black_2%)]/70">
+            <div className="flex items-center justify-between gap-2">
+              <div className="flex items-center gap-2">
+                <Plug className="h-4 w-4" />
+                <span className="font-semibold text-sm">MCP Tools</span>
+              </div>
+              {activeMcps.length > 0 && (
+                <button
+                  onClick={onClearAll}
+                  className="text-xs px-2 py-1 rounded-md border border-[var(--border)] hover:bg-[var(--surface)]"
+                >
+                  Limpar tudo
+                </button>
+              )}
+            </div>
+            <div className="mt-2">
+              <input
+                value={query}
+                onChange={(e) => setQuery(e.target.value)}
+                placeholder="Buscar por servidor ou ferramenta..."
+                className="w-full px-3 py-2 text-sm rounded-md bg-[var(--background)] border border-[var(--border)] outline-none focus:border-[var(--accent)] transition-colors"
+              />
             </div>
-            {activeMcps.length > 0 && (
-              <button
-                onClick={onClearAll}
-                className="text-xs text-red-500 hover:text-red-600 font-medium"
-              >
-                Clear All
-              </button>
-            )}
           </div>
 
           {/* Content */}
           <div className="overflow-y-auto flex-1">
             {loading ? (
-              <div className="p-4 text-center text-sm text-[var(--muted-foreground)]">
-                Loading MCPs...
+              <div className="p-4 text-center text-sm text-[var(--foreground)]/60">
+                Carregando MCPs...
               </div>
             ) : availableMcps.length === 0 ? (
-              <div className="p-4 text-center text-sm text-[var(--muted-foreground)]">
-                No MCPs installed
+              <div className="p-4 text-center text-sm text-[var(--foreground)]/60">
+                Nenhum MCP instalado
+                {onOpenInstallModal && (
+                  <div className="mt-2">
+                    <button
+                      onClick={onOpenInstallModal}
+                      className="text-[var(--accent)] hover:underline"
+                    >
+                      Instalar manualmente
+                    </button>
+                  </div>
+                )}
+              </div>
+            ) : filtered.length === 0 ? (
+              <div className="p-4 text-center text-sm text-[var(--foreground)]/60">
+                Nenhum resultado para "{query}"
               </div>
             ) : (
               <div className="p-2">
-                {availableMcps.map((mcp) => {
+                {filtered.map((mcp) => {
                   const isActive = activeMcps.includes(mcp.mcpId);
 
                   return (
@@ -139,7 +179,7 @@ export function MCPSelector({
                       key={mcp.mcpId}
                       className={`p-3 rounded-md mb-2 cursor-pointer transition-colors ${
                         isActive
-                          ? "bg-[var(--primary)]/10 border border-[var(--primary)]/30"
+                          ? "bg-[var(--accent)]/10 border border-[var(--accent)]/30"
                           : "hover:bg-[var(--surface)]"
                       }`}
                       onClick={() => handleToggle(mcp.mcpId)}
@@ -157,9 +197,9 @@ export function MCPSelector({
                               {mcp.name}
                             </span>
                           </div>
-                          <div className="flex items-center gap-2 text-xs text-[var(--muted-foreground)] ml-6">
+                          <div className="flex items-center gap-2 text-xs text-[var(--foreground)]/60 ml-6">
                             <Zap className="h-3 w-3" />
-                            <span>{mcp.toolCount} tools available</span>
+                            <span>{mcp.toolCount} ferramentas disponíveis</span>
                           </div>
                           {isActive && mcp.tools.length > 0 && (
                             <div className="mt-2 ml-6">
@@ -167,7 +207,7 @@ export function MCPSelector({
                                 {mcp.tools.slice(0, 3).map((tool, idx) => (
                                   <span
                                     key={idx}
-                                    className="text-[10px] px-1.5 py-0.5 bg-[var(--primary)]/20 text-[var(--primary)] rounded"
+                                    className="text-[10px] px-1.5 py-0.5 bg-[var(--accent)]/20 text-[var(--accent)] rounded"
                                     title={tool.description}
                                   >
                                     {tool.name}
@@ -191,14 +231,21 @@ export function MCPSelector({
           </div>
 
           {/* Footer info */}
-          {activeMcps.length > 0 && (
-            <div className="p-3 border-t border-[var(--border)] bg-[var(--surface)]/50">
-              <p className="text-xs text-[var(--muted-foreground)]">
-                AI can use {activeMcps.length} MCP
-                {activeMcps.length > 1 ? "s" : ""} to help answer your questions
-              </p>
-            </div>
-          )}
+          <div className="p-3 border-t border-[var(--border)] bg-[var(--surface)]/50 flex items-center justify-between">
+            <p className="text-xs text-[var(--foreground)]/60">
+              {activeMcps.length > 0
+                ? `${activeMcps.length} MCPs ativos para enriquecer as respostas`
+                : "Nenhum MCP ativo"}
+            </p>
+            {onOpenInstallModal && (
+              <button
+                onClick={onOpenInstallModal}
+                className="text-xs px-2 py-1 rounded-md border border-[var(--border)] hover:bg-[var(--surface)]"
+              >
+                Instalar MCP manualmente
+              </button>
+            )}
+          </div>
         </div>
       )}
     </div>
diff --git a/components/chat/SettingsModal.tsx b/components/chat/SettingsModal.tsx
index 90ca730..017ed6d 100644
--- a/components/chat/SettingsModal.tsx
+++ b/components/chat/SettingsModal.tsx
@@ -8,6 +8,11 @@ type SettingsModalProps = {
   onSystemPromptChange: (prompt: string) => void;
   selectedModel: string | null;
   models: Array<{ id: string; name: string; device: string }>;
+  design?: {
+    chatLayout: "compact" | "edge";
+    bubbleSize: "sm" | "md" | "lg";
+    onChange: (next: Partial<{ chatLayout: "compact" | "edge"; bubbleSize: "sm" | "md" | "lg" }>) => void;
+  };
 };
 
 export function SettingsModal({
@@ -15,14 +20,20 @@ export function SettingsModal({
   onSystemPromptChange,
   selectedModel,
   models,
+  design,
 }: SettingsModalProps) {
   const [isOpen, setIsOpen] = useState(false);
   const [tempPrompt, setTempPrompt] = useState(systemPrompt);
+  const [tempChatLayout, setTempChatLayout] = useState<"compact" | "edge">(design?.chatLayout ?? "compact");
+  const [tempBubbleSize, setTempBubbleSize] = useState<"sm" | "md" | "lg">(design?.bubbleSize ?? "md");
 
   const selectedModelData = models.find((m) => m.id === selectedModel);
 
   const handleSave = () => {
     onSystemPromptChange(tempPrompt);
+    if (design?.onChange) {
+      design.onChange({ chatLayout: tempChatLayout, bubbleSize: tempBubbleSize });
+    }
     setIsOpen(false);
   };
 
@@ -96,6 +107,38 @@ export function SettingsModal({
                   </p>
                 </div>
               </div>
+
+              {/* Preferências de Design */}
+              <div className="space-y-3">
+                <h3 className="font-medium">Preferências de Design</h3>
+                <div className="grid grid-cols-1 md:grid-cols-2 gap-3">
+                  <div className="space-y-2">
+                    <label className="text-sm text-[var(--foreground)]/80">Layout do Chat</label>
+                    <select
+                      value={tempChatLayout}
+                      onChange={(e) => setTempChatLayout(e.target.value as any)}
+                      className="w-full p-2 rounded-lg border border-[var(--border)] bg-[var(--background)]"
+                    >
+                      <option value="compact">Compacto (centralizado)</option>
+                      <option value="edge">Até as bordas (edge-to-edge)</option>
+                    </select>
+                    <p className="text-xs text-[var(--foreground)]/60">Controla se o conteúdo do chat é centralizado com largura máxima ou ocupa toda a largura.</p>
+                  </div>
+                  <div className="space-y-2">
+                    <label className="text-sm text-[var(--foreground)]/80">Tamanho da Bolha</label>
+                    <select
+                      value={tempBubbleSize}
+                      onChange={(e) => setTempBubbleSize(e.target.value as any)}
+                      className="w-full p-2 rounded-lg border border-[var(--border)] bg-[var(--background)]"
+                    >
+                      <option value="sm">Pequena</option>
+                      <option value="md">Média</option>
+                      <option value="lg">Grande</option>
+                    </select>
+                    <p className="text-xs text-[var(--foreground)]/60">Ajusta paddings e tipografia das bolhas de mensagem.</p>
+                  </div>
+                </div>
+              </div>
             </div>
 
             {/* Footer */}
diff --git a/components/layout/Header.tsx b/components/layout/Header.tsx
new file mode 100644
index 0000000..e69de29
diff --git a/components/layout/Sidebar.tsx b/components/layout/Sidebar.tsx
new file mode 100644
index 0000000..e69de29
diff --git a/components/mcp/MCPManualInstallModal.tsx b/components/mcp/MCPManualInstallModal.tsx
index 6c38bb4..28889e1 100644
--- a/components/mcp/MCPManualInstallModal.tsx
+++ b/components/mcp/MCPManualInstallModal.tsx
@@ -129,18 +129,18 @@ export function MCPManualInstallModal({
 
   return (
     <div className="fixed inset-0 bg-black/50 flex items-center justify-center z-50 p-4">
-      <div className="bg-white dark:bg-gray-800 rounded-lg shadow-xl max-w-3xl w-full max-h-[90vh] overflow-y-auto">
+      <div className="bg-[var(--background)] rounded-lg shadow-xl max-w-3xl w-full max-h-[90vh] overflow-y-auto border border-[var(--border)]">
         {/* Header */}
-        <div className="sticky top-0 bg-white dark:bg-gray-800 border-b border-gray-200 dark:border-gray-700 p-4 flex items-center justify-between">
+        <div className="sticky top-0 border-b border-[var(--border)] p-4 flex items-center justify-between bg-[color-mix(in_oklab,var(--background),black_2%)]/90 backdrop-blur supports-[backdrop-filter]:bg-[color-mix(in_oklab,var(--background),black_2%)]/70">
           <div className="flex items-center gap-2">
-            <Upload className="h-5 w-5 text-blue-600 dark:text-blue-400" />
-            <h2 className="text-xl font-semibold text-gray-900 dark:text-white">
-              Install MCP Manually
+            <Upload className="h-5 w-5 text-[var(--accent)]" />
+            <h2 className="text-xl font-semibold">
+              Instalar MCP Manualmente
             </h2>
           </div>
           <button
             onClick={onClose}
-            className="p-2 hover:bg-gray-100 dark:hover:bg-gray-700 rounded-lg transition-colors"
+            className="p-2 hover:bg-[var(--surface)] rounded-lg transition-colors"
           >
             <X className="h-5 w-5" />
           </button>
@@ -149,46 +149,45 @@ export function MCPManualInstallModal({
         {/* Content */}
         <div className="p-6 space-y-6">
           {/* Description */}
-          <div className="bg-blue-50 dark:bg-blue-900/20 border border-blue-200 dark:border-blue-800 rounded-lg p-4">
-            <h3 className="font-medium text-blue-900 dark:text-blue-100 mb-2">
-              How to use
+          <div className="rounded-lg p-4 border border-[var(--border)] bg-[var(--surface)]/60">
+            <h3 className="font-medium mb-2">
+              Como usar
             </h3>
-            <p className="text-sm text-blue-700 dark:text-blue-300 mb-3">
-              Cole a configuração do servidor MCP no formato do Claude Desktop
-              (claude_desktop_config.json). Apenas instalação manual é suportada
-              neste projeto.
+            <p className="text-sm mb-3 text-[var(--foreground)]/80">
+              Cole a configuração do servidor MCP no formato do Claude Desktop (claude_desktop_config.json).
+              Apenas instalação manual é suportada neste projeto.
             </p>
             <button
               onClick={handlePasteExample}
-              className="text-sm text-blue-600 dark:text-blue-400 hover:underline"
+              className="text-sm text-[var(--accent)] hover:underline"
             >
-              Click here to load an example
+              Clique aqui para carregar um exemplo
             </button>
           </div>
 
           {/* MCP ID (optional) */}
           <div>
             <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">
-              MCP ID (optional)
+              MCP ID (opcional)
             </label>
             <input
               type="text"
               value={mcpId}
               onChange={(e) => setMcpId(e.target.value)}
-              placeholder="my-custom-mcp (auto-detected if empty)"
-              className="w-full px-4 py-2 border border-gray-300 dark:border-gray-600 rounded-lg bg-white dark:bg-gray-700 text-gray-900 dark:text-white focus:ring-2 focus:ring-blue-500 focus:border-transparent"
+              placeholder="my-custom-mcp (detectado automaticamente se vazio)"
+              className="w-full px-4 py-2 border border-[var(--border)] rounded-lg bg-[var(--background)] focus:ring-2 focus:ring-[var(--accent)] focus:border-transparent"
             />
           </div>
 
           {/* Configuration JSON */}
           <div>
             <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">
-              Configuration JSON *
+              JSON de Configuração *
             </label>
             <textarea
               value={configJson}
               onChange={(e) => handleConfigChange(e.target.value)}
-              placeholder={`Paste your configuration here, e.g.:
+              placeholder={`Cole a configuração aqui, ex.:
 {
   "mcpServers": {
     "time-server": {
@@ -198,7 +197,7 @@ export function MCPManualInstallModal({
   }
 }`}
               rows={15}
-              className="w-full px-4 py-3 border border-gray-300 dark:border-gray-600 rounded-lg bg-white dark:bg-gray-700 text-gray-900 dark:text-white font-mono text-sm focus:ring-2 focus:ring-blue-500 focus:border-transparent resize-none"
+              className="w-full px-4 py-3 border border-[var(--border)] rounded-lg bg-[var(--background)] font-mono text-sm focus:ring-2 focus:ring-[var(--accent)] focus:border-transparent resize-none"
             />
 
             {/* Validation Status */}
@@ -207,16 +206,12 @@ export function MCPManualInstallModal({
                 {validationError ? (
                   <>
                     <AlertCircle className="h-4 w-4 text-red-500" />
-                    <span className="text-sm text-red-600 dark:text-red-400">
-                      {validationError}
-                    </span>
+                    <span className="text-sm text-red-600">{validationError}</span>
                   </>
                 ) : parsedConfig ? (
                   <>
                     <CheckCircle className="h-4 w-4 text-green-500" />
-                    <span className="text-sm text-green-600 dark:text-green-400">
-                      Valid configuration
-                    </span>
+                    <span className="text-sm text-green-600">Configuração válida</span>
                   </>
                 ) : null}
               </div>
@@ -225,24 +220,22 @@ export function MCPManualInstallModal({
 
           {/* Preview */}
           {parsedConfig && !validationError && (
-            <div className="bg-gray-50 dark:bg-gray-900 border border-gray-200 dark:border-gray-700 rounded-lg p-4">
-              <h3 className="font-medium text-gray-900 dark:text-white mb-3">
-                Preview
-              </h3>
+            <div className="border border-[var(--border)] rounded-lg p-4 bg-[var(--surface)]/50">
+              <h3 className="font-medium mb-3">Pré-visualização</h3>
               <div className="space-y-2 text-sm">
                 {parsedConfig.mcpServers ? (
                   Object.entries(parsedConfig.mcpServers).map(
                     ([name, config]: [string, any]) => (
                       <div key={name} className="space-y-1">
-                        <div className="text-gray-700 dark:text-gray-300">
+                        <div className="">
                           <span className="font-medium">Server:</span> {name}
                         </div>
-                        <div className="text-gray-600 dark:text-gray-400">
+                        <div className="text-[var(--foreground)]/80">
                           <span className="font-medium">Command:</span>{" "}
                           {config.command} {(config.args || []).join(" ")}
                         </div>
                         {config.env && (
-                          <div className="text-gray-600 dark:text-gray-400">
+                          <div className="text-[var(--foreground)]/80">
                             <span className="font-medium">Environment:</span>{" "}
                             {Object.keys(config.env).length} variables
                           </div>
@@ -252,13 +245,13 @@ export function MCPManualInstallModal({
                   )
                 ) : (
                   <div className="space-y-1">
-                    <div className="text-gray-600 dark:text-gray-400">
+                    <div className="text-[var(--foreground)]/80">
                       <span className="font-medium">Command:</span>{" "}
                       {parsedConfig.command}{" "}
                       {(parsedConfig.args || []).join(" ")}
                     </div>
                     {parsedConfig.env && (
-                      <div className="text-gray-600 dark:text-gray-400">
+                      <div className="text-[var(--foreground)]/80">
                         <span className="font-medium">Environment:</span>{" "}
                         {Object.keys(parsedConfig.env).length} variables
                       </div>
@@ -275,12 +268,8 @@ export function MCPManualInstallModal({
               <div className="flex items-start gap-2">
                 <AlertCircle className="h-5 w-5 text-red-500 shrink-0 mt-0.5" />
                 <div className="flex-1">
-                  <h4 className="font-medium text-red-900 dark:text-red-100">
-                    Installation Error
-                  </h4>
-                  <p className="text-sm text-red-700 dark:text-red-300 mt-1">
-                    {error}
-                  </p>
+                  <h4 className="font-medium text-red-900">Erro na instalação</h4>
+                  <p className="text-sm text-red-700 mt-1">{error}</p>
                 </div>
               </div>
             </div>
@@ -288,28 +277,28 @@ export function MCPManualInstallModal({
         </div>
 
         {/* Footer */}
-        <div className="sticky bottom-0 bg-gray-50 dark:bg-gray-900 border-t border-gray-200 dark:border-gray-700 p-4 flex gap-3 justify-end">
+        <div className="sticky bottom-0 bg-[var(--surface)]/60 border-t border-[var(--border)] p-4 flex gap-3 justify-end">
           <button
             onClick={onClose}
             disabled={isInstalling}
-            className="px-4 py-2 text-gray-700 dark:text-gray-300 hover:bg-gray-200 dark:hover:bg-gray-700 rounded-lg transition-colors disabled:opacity-50"
+            className="px-4 py-2 hover:bg-[var(--surface)] rounded-lg transition-colors disabled:opacity-50"
           >
-            Cancel
+            Cancelar
           </button>
           <button
             onClick={handleInstall}
             disabled={isInstalling || !parsedConfig || !!validationError}
-            className="px-6 py-2 bg-blue-600 text-white rounded-lg hover:bg-blue-700 transition-colors disabled:opacity-50 disabled:cursor-not-allowed flex items-center gap-2"
+            className="px-6 py-2 bg-[var(--accent)] text-[var(--accent-foreground)] rounded-lg hover:bg-[color-mix(in_oklab,var(--accent),black_10%)] transition-colors disabled:opacity-50 disabled:cursor-not-allowed flex items-center gap-2"
           >
             {isInstalling ? (
               <>
                 <Loader2 className="h-4 w-4 animate-spin" />
-                Installing...
+                Instalando...
               </>
             ) : (
               <>
                 <Upload className="h-4 w-4" />
-                Install MCP
+                Instalar MCP
               </>
             )}
           </button>
diff --git a/components/message/MarkdownRenderer.tsx b/components/message/MarkdownRenderer.tsx
index f94f193..07c7cfe 100644
--- a/components/message/MarkdownRenderer.tsx
+++ b/components/message/MarkdownRenderer.tsx
@@ -24,7 +24,10 @@ export function MarkdownRenderer({ content }: MarkdownRendererProps) {
       rehypePlugins={[rehypeRaw, rehypeHighlight]}
       components={{
         code({ inline, className, children, ...props }: any) {
-          const text = String(children || "");
+          // Garantir extração correta do texto do bloco, mesmo com quebras/indentação
+          const node: any = (props as any).node;
+          const rawChild = node?.children?.[0]?.value ?? children;
+          const text = String(rawChild ?? "");
 
           if (inline) {
             return (
@@ -34,19 +37,20 @@ export function MarkdownRenderer({ content }: MarkdownRendererProps) {
             );
           }
 
+          const cleaned = text.replace(/^\n+|\n+$/g, "");
           return (
             <div className="relative my-4 rounded-lg border border-[var(--border)] bg-[var(--background)]">
               <button
                 type="button"
                 className="absolute right-2 top-2 rounded px-2 py-1 text-xs bg-[var(--surface)]/70 hover:bg-[var(--surface)] transition-colors"
-                onClick={() => navigator.clipboard.writeText(text)}
+                onClick={() => navigator.clipboard.writeText(cleaned)}
                 aria-label="Copiar código"
               >
                 <Copy className="h-3 w-3" />
               </button>
               <pre className="overflow-auto p-3">
-                <code className={className} {...props}>
-                  {children}
+                <code className={`${className || ""} font-mono text-[var(--foreground)] whitespace-pre`} {...props}>
+                  {cleaned}
                 </code>
               </pre>
             </div>
diff --git a/components/message/MessageActions.tsx b/components/message/MessageActions.tsx
index 7af73f2..bc5ba49 100644
--- a/components/message/MessageActions.tsx
+++ b/components/message/MessageActions.tsx
@@ -42,8 +42,9 @@ export function MessageActions({
   };
 
   return (
-    <div className="flex items-center gap-1 opacity-70">
+    <div className="flex items-center gap-1 opacity-70 pointer-events-auto">
       <button
+        type="button"
         className="rounded px-2 py-1 text-xs hover:bg-[var(--surface)]"
         onClick={handleCopyDefault}
         disabled={disabled}
@@ -54,6 +55,7 @@ export function MessageActions({
 
       <div className="relative">
         <button
+          type="button"
           className="rounded px-1 py-1 text-xs hover:bg-[var(--surface)]"
           onClick={() => setDropdownOpen(!dropdownOpen)}
           disabled={disabled}
@@ -65,12 +67,14 @@ export function MessageActions({
         {dropdownOpen && (
           <div className="absolute right-0 z-10 mt-1 rounded border border-[var(--border)] bg-[var(--background)] shadow-lg">
             <button
+              type="button"
               className="block w-full px-3 py-2 text-left text-xs hover:bg-[var(--surface)]"
               onClick={() => handleModeSelect("markdown")}
             >
               Markdown
             </button>
             <button
+              type="button"
               className="block w-full px-3 py-2 text-left text-xs hover:bg-[var(--surface)]"
               onClick={() => handleModeSelect("text")}
             >
@@ -82,6 +86,7 @@ export function MessageActions({
 
       {onEdit && (
         <button
+          type="button"
           className="rounded px-2 py-1 text-xs hover:bg-[var(--surface)]"
           onClick={onEdit}
           disabled={disabled}
@@ -92,6 +97,7 @@ export function MessageActions({
       )}
       {onRegenerate && (
         <button
+          type="button"
           className="rounded px-2 py-1 text-xs hover:bg-[var(--surface)]"
           onClick={onRegenerate}
           disabled={disabled}
diff --git a/components/model/ModelDropdown.tsx b/components/model/ModelDropdown.tsx
index 3d66828..f91e1d3 100644
--- a/components/model/ModelDropdown.tsx
+++ b/components/model/ModelDropdown.tsx
@@ -247,6 +247,16 @@ export function ModelDropdown({
                   <option value="CPU">CPU Only</option>
                   <option value="GPU">GPU Only</option>
                 </select>
+                {/* Instalar por referência */}
+                {onPullModel && (
+                  <button
+                    onClick={() => handlePullModel("")}
+                    className="rounded-md bg-[var(--accent)] text-white px-2 py-1 text-xs hover:bg-[color-mix(in_oklab,var(--accent),black_10%)]"
+                    title="Instalar por referência (ex.: owner/model:tag)"
+                  >
+                    Install by ref
+                  </button>
+                )}
               </div>
             </div>
 
diff --git a/components/model/ModelPullDialog.tsx b/components/model/ModelPullDialog.tsx
index 8b02d74..e63993e 100644
--- a/components/model/ModelPullDialog.tsx
+++ b/components/model/ModelPullDialog.tsx
@@ -27,22 +27,113 @@ export function ModelPullDialog({
   const [isPulling, setIsPulling] = useState(false);
   const [progress, setProgress] = useState<PullProgress | null>(null);
   const [error, setError] = useState<string | null>(null);
+  const [isSuccess, setIsSuccess] = useState<boolean>(false);
+  const [editableName, setEditableName] = useState<string>(modelName);
+  const [tags, setTags] = useState<string[]>([]);
+  const [isLoadingTags, setIsLoadingTags] = useState<boolean>(false);
 
   useEffect(() => {
     if (!isOpen) {
       setIsPulling(false);
       setProgress(null);
       setError(null);
+      setIsSuccess(false);
+      setEditableName(modelName);
+      setTags([]);
+      setIsLoadingTags(false);
+      return;
     }
-  }, [isOpen]);
+
+    // Ao abrir, tentar buscar tags conhecidas
+    const base = String(modelName).split(":")[0];
+    setEditableName(modelName);
+    if (!base) {
+      setTags([]);
+      setIsLoadingTags(false);
+      return;
+    }
+    setIsLoadingTags(true);
+    fetch(`/api/ollama/tags?name=${encodeURIComponent(base)}`)
+      .then((res) => res.json())
+      .then((data) => {
+        if (data?.success && Array.isArray(data.tags)) {
+          setTags(data.tags);
+        } else {
+          setTags([]);
+        }
+      })
+      .catch(() => setTags([]))
+      .finally(() => setIsLoadingTags(false));
+  }, [isOpen, modelName]);
 
   const handleConfirm = async () => {
     setIsPulling(true);
     setError(null);
+    setProgress(null);
 
     try {
-      await onConfirmPull(modelName);
-      onClose();
+      const response = await fetch("/api/ollama/pull", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ model: editableName.trim() }),
+      });
+
+      if (!response.ok) {
+        throw new Error("Falha ao iniciar download do modelo");
+      }
+
+      const reader = response.body?.getReader();
+      if (!reader) throw new Error("Resposta inválida do servidor");
+
+      const decoder = new TextDecoder();
+      let buffer = "";
+
+      while (true) {
+        const { done, value } = await reader.read();
+        if (done) break;
+
+        buffer += decoder.decode(value, { stream: true });
+        const lines = buffer.split("\n");
+        buffer = lines.pop() || "";
+
+        for (const line of lines) {
+          if (!line.trim()) continue;
+          try {
+            const data = JSON.parse(line);
+            
+            // Processar diferentes estados de progresso
+            if (data.status === "downloading" || data.status === "pulling") {
+              setProgress({
+                status: data.status,
+                total: data.total,
+                completed: data.completed,
+                digest: data.digest,
+              });
+            } else if (data.status === "success") {
+              setProgress((prev) => ({ 
+                status: "success", 
+                total: prev?.total, 
+                completed: prev?.total 
+              }));
+              setIsSuccess(true);
+            } else if (data.error) {
+              setError(data.detail || data.error);
+            } else if (data.total || data.completed) {
+              // Caso o status não seja "downloading" mas tenha dados de progresso
+              setProgress({
+                status: data.status || "downloading",
+                total: data.total,
+                completed: data.completed,
+                digest: data.digest,
+              });
+            }
+          } catch (e) {
+            // ignorar linhas inválidas
+          }
+        }
+      }
+
+      // Não fechar automaticamente; permitir usuário fechar ao concluir
     } catch (err) {
       setError(err instanceof Error ? err.message : "Failed to pull model");
     } finally {
@@ -50,6 +141,18 @@ export function ModelPullDialog({
     }
   };
 
+  const formatBytes = (n?: number) => {
+    if (!n || n <= 0) return "0 MB";
+    const mb = n / 1024 / 1024;
+    if (mb < 1024) return `${mb.toFixed(1)} MB`;
+    const gb = mb / 1024;
+    return `${gb.toFixed(2)} GB`;
+  };
+
+  const percent = progress?.total && progress?.completed
+    ? Math.max(0, Math.min(100, Math.round((progress.completed / progress.total) * 100)))
+    : 0;
+
   if (!isOpen) return null;
 
   return (
@@ -67,42 +170,90 @@ export function ModelPullDialog({
           </button>
         </div>
 
-        <div className="mb-4">
-          <p className="text-sm text-[var(--foreground)]/80 mb-2">
-            Install <span className="font-medium">{modelName}</span>?
-          </p>
+        <div className="mb-4 space-y-2">
+          <div>
+            <p className="text-sm text-[var(--foreground)]/80 mb-2">
+              Confirme o identificador do modelo (nome[:tag]):
+            </p>
+            <input
+              type="text"
+              value={editableName}
+              onChange={(e) => setEditableName(e.target.value)}
+              disabled={isPulling}
+              className="w-full rounded-md border border-[var(--border)] bg-[var(--background)] px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-[var(--accent)]"
+              placeholder="ex.: llama3:8b-instruct"
+            />
+          </div>
+
+          <div>
+            <div className="flex items-center justify-between mb-1">
+              <p className="text-xs text-[var(--foreground)]/60">Tags disponíveis</p>
+              {isLoadingTags && (
+                <span className="text-xs text-[var(--foreground)]/50">Carregando…</span>
+              )}
+            </div>
+            {tags.length > 0 ? (
+              <select
+                className="w-full rounded-md border border-[var(--border)] bg-[var(--background)] px-3 py-2 text-sm"
+                onChange={(e) => {
+                  const base = String(modelName).split(":")[0];
+                  const tag = e.target.value;
+                  setEditableName(`${base}:${tag}`);
+                }}
+                defaultValue=""
+                disabled={isPulling}
+              >
+                <option value="" disabled>
+                  Selecione uma tag (opcional)
+                </option>
+                {tags.map((t) => (
+                  <option key={t} value={t}>
+                    {t}
+                  </option>
+                ))}
+              </select>
+            ) : (
+              <p className="text-xs text-[var(--foreground)]/50">
+                Nenhuma tag detectada automaticamente. Você pode digitar manualmente.
+              </p>
+            )}
+          </div>
+
           <p className="text-xs text-[var(--foreground)]/60">
-            This will download the model to your local Ollama installation.
+            Isso fará o download do modelo na sua instalação local do Ollama.
           </p>
         </div>
 
         {progress && (
           <div className="mb-4 rounded-lg bg-[var(--surface)] p-3">
             <div className="flex items-center justify-between text-sm mb-2">
-              <span>Downloading...</span>
-              <span>
-                {progress.total && progress.completed
-                  ? `${Math.round(
-                      (progress.completed / progress.total) * 100,
-                    )}%`
-                  : "0%"}
+              <span className="flex items-center gap-2">
+                {!isSuccess && <Loader2 className="h-4 w-4 animate-spin" />}
+                {isSuccess ? "Download concluído" : "Baixando modelo..."}
               </span>
+              {progress.total && progress.completed && <span>{percent}%</span>}
             </div>
-            <div className="w-full bg-[var(--border)] rounded-full h-2">
+            <div className="w-full bg-[var(--border)] rounded-full h-2 overflow-hidden">
               <div
-                className="bg-[var(--accent)] h-2 rounded-full transition-all duration-300"
-                style={{
-                  width:
-                    progress.total && progress.completed
-                      ? `${(progress.completed / progress.total) * 100}%`
-                      : "0%",
-                }}
+                className={`h-2 transition-all duration-300 ${
+                  isSuccess ? "bg-green-500" : "bg-[var(--accent)]"
+                }`}
+                style={{ width: `${percent}%` }}
               />
             </div>
-            {progress.digest && (
-              <p className="text-xs text-[var(--foreground)]/60 mt-1">
-                {progress.digest.slice(0, 12)}...
-              </p>
+            {progress.total && progress.completed ? (
+              <div className="mt-2 flex items-center justify-between text-xs text-[var(--foreground)]/60">
+                <span>
+                  {formatBytes(progress.completed)} / {formatBytes(progress.total)}
+                </span>
+                {progress?.digest && (
+                  <span>sha256: {progress.digest.slice(0, 12)}...</span>
+                )}
+              </div>
+            ) : (
+              <div className="mt-2 text-xs text-[var(--foreground)]/60">
+                Aguardando informações de progresso...
+              </div>
             )}
           </div>
         )}
@@ -119,25 +270,27 @@ export function ModelPullDialog({
             disabled={isPulling}
             className="px-4 py-2 text-sm rounded-md border border-[var(--border)] transition-colors hover:bg-[var(--surface)] disabled:opacity-50"
           >
-            Cancel
-          </button>
-          <button
-            onClick={handleConfirm}
-            disabled={isPulling}
-            className="flex items-center gap-2 px-4 py-2 text-sm rounded-md bg-[var(--accent)] text-white transition-colors hover:bg-[color-mix(in_oklab,var(--accent),black_10%)] disabled:opacity-50"
-          >
-            {isPulling ? (
-              <>
-                <Loader2 className="h-4 w-4 animate-spin" />
-                Installing...
-              </>
-            ) : (
-              <>
-                <Download className="h-4 w-4" />
-                Install
-              </>
-            )}
+            {isSuccess ? "Fechar" : "Cancelar"}
           </button>
+          {!isSuccess && (
+            <button
+              onClick={handleConfirm}
+              disabled={isPulling}
+              className="flex items-center gap-2 px-4 py-2 text-sm rounded-md bg-[var(--accent)] text-white transition-colors hover:bg-[color-mix(in_oklab,var(--accent),black_10%)] disabled:opacity-50"
+            >
+              {isPulling ? (
+                <>
+                  <Loader2 className="h-4 w-4 animate-spin" />
+                  Installing...
+                </>
+              ) : (
+                <>
+                  <Download className="h-4 w-4" />
+                  Install
+                </>
+              )}
+            </button>
+          )}
         </div>
       </div>
     </div>
diff --git a/components/settings/SettingsModal.tsx b/components/settings/SettingsModal.tsx
index a9b3cd4..b752638 100644
--- a/components/settings/SettingsModal.tsx
+++ b/components/settings/SettingsModal.tsx
@@ -25,11 +25,14 @@ export function SettingsModal({
   onClose: () => void;
 }) {
   const { prefs, ready, update } = useUserPrefs();
-  const [tab, setTab] = useState<"general" | "execution">("general");
+  const [tab, setTab] = useState<"general" | "execution" | "device">("general");
   const [localPrompt, setLocalPrompt] = useState("");
   const [device, setDevice] = useState<DevicePref>("auto");
   const [gpuIndex, setGpuIndex] = useState(0);
   const [numGpu, setNumGpu] = useState(1);
+  const [chatLayout, setChatLayout] = useState<"compact" | "edge">("compact");
+  const [bubbleSize, setBubbleSize] = useState<"sm" | "md" | "lg">("md");
+  const [sysInfo, setSysInfo] = useState<any>(null);
 
   useEffect(() => {
     if (!ready) return;
@@ -37,10 +40,12 @@ export function SettingsModal({
     setDevice(prefs.device);
     setGpuIndex(prefs.gpuIndex);
     setNumGpu(prefs.numGpu);
+    setChatLayout((prefs as any).chatLayout ?? "compact");
+    setBubbleSize((prefs as any).bubbleSize ?? "md");
   }, [ready, prefs]);
 
   const handleSave = () => {
-    update({ systemPrompt: localPrompt, device, gpuIndex, numGpu });
+    update({ systemPrompt: localPrompt, device, gpuIndex, numGpu, chatLayout, bubbleSize });
     onClose();
   };
 
@@ -82,6 +87,16 @@ export function SettingsModal({
           >
             Execution
           </button>
+          <button
+            className={`px-3 py-2 text-sm ${
+              tab === "device"
+                ? "border-b-2 border-accent font-medium"
+                : "text-[var(--foreground)]/60"
+            }`}
+            onClick={() => setTab("device")}
+          >
+            Device
+          </button>
         </div>
 
         {tab === "general" && (
@@ -96,6 +111,32 @@ export function SettingsModal({
             <p className="text-xs text-[var(--foreground)]/60">
               Sent at the start of a conversation to guide model behavior.
             </p>
+
+            <div className="mt-4 grid grid-cols-1 gap-3 md:grid-cols-2">
+              <div>
+                <label className="text-sm font-medium">Chat layout</label>
+                <select
+                  value={chatLayout}
+                  onChange={(e) => setChatLayout(e.target.value as any)}
+                  className="mt-1 w-full rounded-md border border-border bg-background px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-accent"
+                >
+                  <option value="compact">Compact (centered)</option>
+                  <option value="edge">Edge-to-edge</option>
+                </select>
+              </div>
+              <div>
+                <label className="text-sm font-medium">Bubble size</label>
+                <select
+                  value={bubbleSize}
+                  onChange={(e) => setBubbleSize(e.target.value as any)}
+                  className="mt-1 w-full rounded-md border border-border bg-background px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-accent"
+                >
+                  <option value="sm">Small</option>
+                  <option value="md">Medium</option>
+                  <option value="lg">Large</option>
+                </select>
+              </div>
+            </div>
           </div>
         )}
 
@@ -157,6 +198,17 @@ export function SettingsModal({
           </div>
         )}
 
+        {tab === "device" && (
+          <DeviceStatus
+            sysInfo={sysInfo}
+            setSysInfo={setSysInfo}
+            device={device}
+            gpuIndex={gpuIndex}
+            setDevice={setDevice}
+            setGpuIndex={setGpuIndex}
+          />
+        )}
+
         <div className="mt-6 flex justify-end gap-2">
           <button
             onClick={onClose}
@@ -175,3 +227,110 @@ export function SettingsModal({
     </div>
   );
 }
+
+function DeviceStatus({ sysInfo, setSysInfo, device, gpuIndex, setDevice, setGpuIndex }: { sysInfo: any; setSysInfo: (v: any) => void; device: DevicePref; gpuIndex: number; setDevice: (d: DevicePref) => void; setGpuIndex: (i: number) => void; }) {
+  // polling a cada 2s
+  useEffect(() => {
+    let mounted = true;
+    const load = () => {
+      fetch("/api/system/status")
+        .then((r) => r.json())
+        .then((d) => mounted && d.success && setSysInfo(d.info))
+        .catch(() => {});
+    };
+    load();
+    const id = setInterval(load, 2000);
+    return () => {
+      mounted = false;
+      clearInterval(id);
+    };
+  }, [setSysInfo]);
+
+  // Defaultar GPU 0 quando houver GPU e usuário escolher GPU
+  useEffect(() => {
+    const gpus = Array.isArray(sysInfo?.gpus) ? sysInfo.gpus : [];
+    if (device === "gpu" && gpus.length > 0) {
+      if (typeof gpuIndex !== "number" || gpuIndex < 0 || gpuIndex >= gpus.length) {
+        setGpuIndex(0);
+      }
+    }
+  }, [device, gpuIndex, sysInfo, setGpuIndex]);
+
+  if (!sysInfo) {
+    return <div className="text-sm text-[var(--foreground)]/60">Loading device info...</div>;
+  }
+
+  const memPct = sysInfo.memory.total > 0 ? (sysInfo.memory.used / sysInfo.memory.total) * 100 : 0;
+  const memModules = Array.isArray(sysInfo.memory.modules) ? sysInfo.memory.modules : [];
+  const gpus = Array.isArray(sysInfo.gpus) ? sysInfo.gpus : [];
+  const hasGpu = gpus.length > 0;
+  const currentGpu = hasGpu ? Math.min(Math.max(0, gpuIndex || 0), gpus.length - 1) : 0;
+  return (
+    <div className="space-y-4">
+      <div className="grid grid-cols-2 gap-3 text-sm">
+        <div className="rounded-md border border-border p-3">
+          <div className="font-medium mb-1">Sistema</div>
+          <div>OS: {sysInfo.os?.platform || sysInfo.platform} {sysInfo.os?.release || sysInfo.release}</div>
+          <div>Arch: {sysInfo.os?.arch || sysInfo.arch}</div>
+          <div>CPU: {sysInfo.cpu?.model} ({sysInfo.cpu?.cores} cores)</div>
+          <div>Uptime: {Math.round(sysInfo.uptimeSec / 60)} min</div>
+        </div>
+        <div className="rounded-md border border-border p-3">
+          <div className="font-medium mb-1">Carga</div>
+          <div>Load (1m/5m/15m): {Number(sysInfo.metrics?.loadAvg?.["1m"] ?? 0).toFixed(2)} / {Number(sysInfo.metrics?.loadAvg?.["5m"] ?? 0).toFixed(2)} / {Number(sysInfo.metrics?.loadAvg?.["15m"] ?? 0).toFixed(2)}</div>
+          <div>Memória: {(sysInfo.memory.used/1024/1024).toFixed(0)}MB / {(sysInfo.memory.total/1024/1024).toFixed(0)}MB ({memPct.toFixed(0)}%)</div>
+          <div>Módulos de RAM: {memModules.length}</div>
+        </div>
+      </div>
+
+      <div className="rounded-md border border-border p-3 text-sm">
+        <div className="font-medium mb-1">Aplicativo</div>
+        <div>RSS: {(sysInfo.metrics?.process?.rss/1024/1024).toFixed(0)}MB | Heap: {(sysInfo.metrics?.process?.heapUsed/1024/1024).toFixed(0)}MB / {(sysInfo.metrics?.process?.heapTotal/1024/1024).toFixed(0)}MB</div>
+      </div>
+
+      <div className="rounded-md border border-border p-3 text-sm">
+        <div className="font-medium mb-2">Placas de vídeo</div>
+        {hasGpu ? (
+          <div className="space-y-2">
+            {gpus.map((g: any) => (
+              <div key={g.index} className="flex items-center justify-between rounded-md border border-border p-2">
+                <div>
+                  <div className="font-medium">{g.name}</div>
+                  <div className="text-[var(--foreground)]/70">{g.vendor || ""} {g.vramMB ? `• ${g.vramMB}MB VRAM` : ""} {g.bus ? `• ${g.bus}` : ""}</div>
+                </div>
+                <div className="text-xs">index: {g.index}</div>
+              </div>
+            ))}
+          </div>
+        ) : (
+          <div className="text-[var(--foreground)]/60">Nenhuma GPU detectada</div>
+        )}
+      </div>
+
+      <div className="rounded-md border border-border p-3 text-sm">
+        <div className="font-medium mb-2">Dispositivo principal</div>
+        <div className="flex flex-col gap-2 md:flex-row md:items-center">
+          <label className="inline-flex items-center gap-2">
+            <input type="radio" name="dev" checked={device === "cpu"} onChange={() => setDevice("cpu")}/> CPU
+          </label>
+          <label className="inline-flex items-center gap-2">
+            <input type="radio" name="dev" checked={device === "gpu"} onChange={() => setDevice("gpu")} disabled={!hasGpu}/> GPU
+          </label>
+          <select
+            disabled={device !== "gpu" || !hasGpu}
+            value={currentGpu}
+            onChange={(e) => setGpuIndex(Number(e.target.value))}
+            className="mt-1 w-full md:w-auto rounded-md border border-border bg-background px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-accent"
+          >
+            {gpus.map((g: any) => (
+              <option key={g.index} value={g.index}>{g.index}: {g.name}</option>
+            ))}
+          </select>
+          <span className="text-xs text-[var(--foreground)]/60">Se houver GPU, ela será o padrão quando selecionar GPU.</span>
+        </div>
+      </div>
+
+      <p className="text-xs text-[var(--foreground)]/60">Para métricas detalhadas por modelo/GPU, integrações com o servidor de modelos serão adicionadas depois.</p>
+    </div>
+  );
+}
diff --git a/components/ui/Badge.tsx b/components/ui/Badge.tsx
new file mode 100644
index 0000000..e69de29
diff --git a/components/ui/Button.tsx b/components/ui/Button.tsx
new file mode 100644
index 0000000..e69de29
diff --git a/components/ui/Card.tsx b/components/ui/Card.tsx
new file mode 100644
index 0000000..e69de29
diff --git a/components/ui/Input.tsx b/components/ui/Input.tsx
new file mode 100644
index 0000000..e69de29
diff --git a/components/ui/Separator.tsx b/components/ui/Separator.tsx
new file mode 100644
index 0000000..e69de29
diff --git a/database/ollahub-preferences.db-shm b/database/ollahub-preferences.db-shm
index 3a7629b..aed4468 100644
Binary files a/database/ollahub-preferences.db-shm and b/database/ollahub-preferences.db-shm differ
diff --git a/database/ollahub-preferences.db-wal b/database/ollahub-preferences.db-wal
index 941779b..16d5222 100644
Binary files a/database/ollahub-preferences.db-wal and b/database/ollahub-preferences.db-wal differ
diff --git a/database/ollahub.db-shm b/database/ollahub.db-shm
index 14ef20c..59c72cd 100644
Binary files a/database/ollahub.db-shm and b/database/ollahub.db-shm differ
diff --git a/database/ollahub.db-wal b/database/ollahub.db-wal
index 8fd86f8..8006661 100644
Binary files a/database/ollahub.db-wal and b/database/ollahub.db-wal differ
diff --git a/database/user-remote-models.json b/database/user-remote-models.json
new file mode 100644
index 0000000..8260022
--- /dev/null
+++ b/database/user-remote-models.json
@@ -0,0 +1,9 @@
+{
+  "models": [
+    {
+      "name": "goonsai/josiefied-qwen2.5-7b-abliterated-v2:latest",
+      "installed": true,
+      "lastUsedAt": "2025-10-29T20:40:19.434Z"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/hooks/useUserPrefs.ts b/hooks/useUserPrefs.ts
index cca031a..c54a589 100644
--- a/hooks/useUserPrefs.ts
+++ b/hooks/useUserPrefs.ts
@@ -10,6 +10,9 @@ type Prefs = {
   device: DevicePref;
   gpuIndex: number;
   numGpu: number;
+  // Preferências de design
+  chatLayout?: "compact" | "edge"; // compact = centralizado com max-width; edge = até as bordas
+  bubbleSize?: "sm" | "md" | "lg"; // tamanhos de bolha
 };
 
 const defaultPrefs: Prefs = {
@@ -18,6 +21,8 @@ const defaultPrefs: Prefs = {
   device: "auto",
   gpuIndex: 0,
   numGpu: 1,
+  chatLayout: "compact",
+  bubbleSize: "md",
 };
 
 export function useUserPrefs() {
diff --git a/lib/ollama.ts b/lib/ollama.ts
index e2ee3e2..e5cca4a 100644
--- a/lib/ollama.ts
+++ b/lib/ollama.ts
@@ -188,6 +188,8 @@ export async function searchRemoteModels(query?: string): Promise<any[]> {
     return filtered.map((m) => ({
       name: m.name,
       description: m.description,
+      url: m.url,
+      tags_count: m.tags_count,
       installed: installedNames.has(m.name),
       remote: true,
     }));
diff --git a/lib/services/mcp-installer.ts b/lib/services/mcp-installer.ts
index 3e493c4..3af5b34 100644
--- a/lib/services/mcp-installer.ts
+++ b/lib/services/mcp-installer.ts
@@ -127,8 +127,9 @@ export class MCPInstallerService {
     const logs: string[] = [];
 
     try {
+      const npmBin = process.platform === "win32" ? "npm.cmd" : "npm";
       const result = await spawnWithProgress(
-        "npm",
+        npmBin,
         ["install", packageName, "--prefix", npmDir],
         {
           cwd: npmDir,
@@ -171,15 +172,34 @@ export class MCPInstallerService {
 
       // Construir ambiente
       // Para NPM, executar npx do diretório onde foi instalado (não usa --prefix que não funciona)
+      const npxBin = process.platform === "win32" ? "npx.cmd" : "npx";
       const environment: MCPEnvironment = {
         type: "npm",
         path: npmDir,
-        executable: "npx",
-        args: [packageName],
+        executable: npxBin,
+        args: ["-y", packageName],
       };
 
       return environment;
     } catch (error: any) {
+      const msg = String(error?.message || "");
+      if (msg.includes("spawn EINVAL") || msg.includes("Failed to spawn process") || msg.includes("ENOENT")) {
+        const npxBin = process.platform === "win32" ? "npx.cmd" : "npx";
+        onProgress({
+          status: "installing" as MCPInstallationStatus,
+          message: "Falling back to npx runtime execution (no preinstall)",
+          percentage: 60,
+          logs: config.enableLogs ? [msg] : undefined,
+        });
+
+        const environment: MCPEnvironment = {
+          type: "npm",
+          path: npmDir,
+          executable: npxBin,
+          args: ["-y", packageName],
+        };
+        return environment;
+      }
       throw new Error(`NPM installation failed: ${error.message}`);
     }
   }
diff --git a/lib/services/mcp-validator.ts b/lib/services/mcp-validator.ts
index b8dcd93..953214f 100644
--- a/lib/services/mcp-validator.ts
+++ b/lib/services/mcp-validator.ts
@@ -46,6 +46,7 @@ export class MCPValidatorService {
           cwd: environment.path, // Executar do diretório de instalação
           env,
           stdio: ["pipe", "pipe", "pipe"],
+          shell: process.platform === "win32", // Workaround para *.cmd no Windows
         });
 
         let stdout = "";
@@ -250,6 +251,7 @@ export class MCPValidatorService {
           cwd: environment.path, // Executar do diretório de instalação
           env,
           stdio: ["pipe", "pipe", "pipe"],
+          shell: process.platform === "win32",
         });
 
         let hasResolved = false;
diff --git a/lib/user-remote-models.ts b/lib/user-remote-models.ts
new file mode 100644
index 0000000..0cf792a
--- /dev/null
+++ b/lib/user-remote-models.ts
@@ -0,0 +1,62 @@
+import fs from "node:fs/promises";
+import path from "node:path";
+
+export type SavedRemoteModel = {
+  name: string; // full ref, e.g., owner/model:tag or model:tag
+  description?: string;
+  url?: string;
+  tags_count?: number;
+  installed?: boolean;
+  lastUsedAt?: string; // ISO
+};
+
+type SavedRemoteFile = {
+  models: SavedRemoteModel[];
+};
+
+function getFilePath() {
+  return path.join(process.cwd(), "database", "user-remote-models.json");
+}
+
+async function ensureFile(): Promise<void> {
+  const file = getFilePath();
+  try {
+    await fs.access(file);
+  } catch {
+    const initial: SavedRemoteFile = { models: [] };
+    await fs.mkdir(path.dirname(file), { recursive: true });
+    await fs.writeFile(file, JSON.stringify(initial, null, 2), "utf-8");
+  }
+}
+
+export async function getSavedRemoteModels(): Promise<SavedRemoteModel[]> {
+  await ensureFile();
+  const raw = await fs.readFile(getFilePath(), "utf-8");
+  try {
+    const json = JSON.parse(raw) as SavedRemoteFile;
+    return Array.isArray(json.models) ? json.models : [];
+  } catch {
+    return [];
+  }
+}
+
+export async function addSavedRemoteModel(entry: SavedRemoteModel): Promise<void> {
+  await ensureFile();
+  const current = await getSavedRemoteModels();
+  const nowIso = new Date().toISOString();
+  const idx = current.findIndex((m) => m.name === entry.name);
+  const merged: SavedRemoteModel = {
+    ...entry,
+    installed: entry.installed ?? false,
+    lastUsedAt: entry.lastUsedAt ?? nowIso,
+  };
+  if (idx >= 0) {
+    current[idx] = { ...current[idx], ...merged, lastUsedAt: nowIso };
+  } else {
+    current.unshift(merged);
+  }
+  const toWrite: SavedRemoteFile = { models: current.slice(0, 500) };
+  await fs.writeFile(getFilePath(), JSON.stringify(toWrite, null, 2), "utf-8");
+}
+
+