diff --git a/app/layout.tsx b/app/layout.tsx
index a657128..99441c7 100644
--- a/app/layout.tsx
+++ b/app/layout.tsx
@@ -3,6 +3,7 @@ import "./globals.css";
 import { BottomNav } from "@/components/BottomNav";
 import { Providers } from "@/components/Providers";
 import { ErrorBoundary } from "@/components/ErrorBoundary";
+import { SearchOverlay } from "@/components/SearchOverlay";
 
 export const metadata: Metadata = {
   title: "Hermes OS",
@@ -31,6 +32,7 @@ export default function RootLayout({ children }: { children: React.ReactNode })
             <ErrorBoundary>{children}</ErrorBoundary>
           </main>
           <BottomNav />
+          <SearchOverlay />
         </Providers>
         <script
           dangerouslySetInnerHTML={{
diff --git a/components/MessageBubble.tsx b/components/MessageBubble.tsx
index 0d9cdf4..b8895ad 100644
--- a/components/MessageBubble.tsx
+++ b/components/MessageBubble.tsx
@@ -1,7 +1,7 @@
 "use client";
 
 import { useState } from "react";
-import { Wrench, ChevronDown, ChevronRight, Lightbulb } from "lucide-react";
+import { Wrench, ChevronDown, ChevronRight, Lightbulb, Copy, Check } from "lucide-react";
 import type { Message, ToolCall } from "@/lib/types";
 
 type Verbosity = "compact" | "normal" | "full";
@@ -85,10 +85,18 @@ export function MessageBubble({ message, toolResults, verbosity = "normal", show
 
   if (!content && toolCalls.length === 0 && !reasoning) return null;
 
+  const [copied, setCopied] = useState(false);
   const showTools = verbosity !== "compact" && toolCalls.length > 0;
   const showReasoning = verbosity === "full" && reasoning;
   const expandTools = verbosity === "full";
 
+  const copyContent = () => {
+    navigator.clipboard.writeText(content).then(() => {
+      setCopied(true);
+      setTimeout(() => setCopied(false), 1500);
+    });
+  };
+
   return (
     <div className={`flex ${isUser ? "justify-end" : "justify-start"}`}>
       <div
@@ -134,6 +142,17 @@ export function MessageBubble({ message, toolResults, verbosity = "normal", show
           </div>
         )}
 
+        {/* Copy button - long press or tap area */}
+        {content && !isUser && (
+          <button
+            onClick={copyContent}
+            className="mt-1 p-0.5 rounded active:bg-white/[0.04]"
+            style={{ color: "var(--text-3)" }}
+          >
+            {copied ? <Check size={12} /> : <Copy size={12} />}
+          </button>
+        )}
+
         {/* Timestamp */}
         {showTimestamp && message.timestamp && (
           <div className="text-[10px] mt-1" style={{ color: isUser ? "rgba(255,255,255,0.5)" : "var(--text-3)" }}>
diff --git a/components/SearchOverlay.tsx b/components/SearchOverlay.tsx
new file mode 100644
index 0000000..10230d7
--- /dev/null
+++ b/components/SearchOverlay.tsx
@@ -0,0 +1,109 @@
+"use client";
+
+import { useState, useEffect, useRef } from "react";
+import { Search, X, Clock, MessageSquare } from "lucide-react";
+import { useRouter } from "next/navigation";
+import { useSessionSearch } from "@/lib/hooks";
+
+export function SearchOverlay() {
+  const [open, setOpen] = useState(false);
+  const [query, setQuery] = useState("");
+  const inputRef = useRef<HTMLInputElement>(null);
+  const router = useRouter();
+  const { data, isFetching } = useSessionSearch(open ? query : "");
+
+  // Cmd+K / Ctrl+K to open
+  useEffect(() => {
+    const handler = (e: KeyboardEvent) => {
+      if ((e.metaKey || e.ctrlKey) && e.key === "k") {
+        e.preventDefault();
+        setOpen(true);
+      }
+      if (e.key === "Escape") {
+        setOpen(false);
+        setQuery("");
+      }
+    };
+    window.addEventListener("keydown", handler);
+    return () => window.removeEventListener("keydown", handler);
+  }, []);
+
+  useEffect(() => {
+    if (open) inputRef.current?.focus();
+  }, [open]);
+
+  const go = (sessionId: string) => {
+    setOpen(false);
+    setQuery("");
+    router.push("/history/" + sessionId);
+  };
+
+  if (!open) return null;
+
+  return (
+    <div
+      className="fixed inset-0 z-[200] flex flex-col"
+      style={{ background: "rgba(0,0,0,0.7)", backdropFilter: "blur(4px)" }}
+      onClick={() => { setOpen(false); setQuery(""); }}
+    >
+      <div
+        className="mx-4 mt-16 max-w-lg w-full self-center"
+        onClick={(e) => e.stopPropagation()}
+      >
+        <div className="relative">
+          <Search size={16} className="absolute left-3 top-1/2 -translate-y-1/2" style={{ color: "var(--text-3)" }} />
+          <input
+            ref={inputRef}
+            type="text"
+            value={query}
+            onChange={(e) => setQuery(e.target.value)}
+            placeholder="Search all sessions..."
+            className="w-full pl-9 pr-9 py-3 rounded-t-2xl text-[15px] outline-none"
+            style={{ background: "var(--bg-raised)", border: "1px solid var(--border)", color: "var(--text-1)", borderBottom: "none" }}
+          />
+          {query && (
+            <button onClick={() => setQuery("")} className="absolute right-3 top-1/2 -translate-y-1/2" style={{ color: "var(--text-3)" }}>
+              <X size={16} />
+            </button>
+          )}
+        </div>
+
+        <div
+          className="rounded-b-2xl max-h-[60vh] overflow-y-auto"
+          style={{ background: "var(--bg-raised)", border: "1px solid var(--border)", borderTop: "1px solid var(--border)" }}
+        >
+          {query.length < 2 ? (
+            <div className="p-4 text-center text-[13px]" style={{ color: "var(--text-3)" }}>
+              Type to search across all sessions
+            </div>
+          ) : isFetching ? (
+            <div className="p-4 text-center text-[13px]" style={{ color: "var(--text-3)" }}>
+              Searching...
+            </div>
+          ) : data?.results?.length ? (
+            data.results.map((r) => (
+              <button
+                key={r.message_id}
+                onClick={() => go(r.session_id)}
+                className="w-full text-left px-4 py-3 border-b border-white/[0.04] active:bg-white/[0.04] transition-colors"
+              >
+                <div className="flex items-center gap-2 mb-0.5">
+                  <MessageSquare size={12} style={{ color: "var(--accent)" }} />
+                  <span className="text-[12px] font-medium" style={{ color: "var(--text-2)" }}>
+                    {r.session_title || r.session_id.slice(0, 12)}
+                  </span>
+                  <span className="text-[10px] ml-auto" style={{ color: "var(--text-3)" }}>{r.role}</span>
+                </div>
+                <p className="text-[13px] line-clamp-2" style={{ color: "var(--text-1)" }}>{r.content}</p>
+              </button>
+            ))
+          ) : (
+            <div className="p-4 text-center text-[13px]" style={{ color: "var(--text-3)" }}>
+              No results for &ldquo;{query}&rdquo;
+            </div>
+          )}
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/next.config.ts b/next.config.ts
index 3df43b8..bc6e829 100644
--- a/next.config.ts
+++ b/next.config.ts
@@ -3,6 +3,7 @@ import type { NextConfig } from "next";
 const nextConfig: NextConfig = {
   output: "standalone",
   reactStrictMode: true,
+  transpilePackages: ["react-markdown", "remark-gfm"],
 };
 
 export default nextConfig;