diff --git a/package-lock.json b/package-lock.json
index bd5ccbc..7de52ac 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@evoscientist/webui",
-  "version": "0.1.4",
+  "version": "0.1.5",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@evoscientist/webui",
-      "version": "0.1.4",
+      "version": "0.1.5",
       "license": "Apache-2.0",
       "dependencies": {
         "@langchain/core": "1.1.19",
diff --git a/package.json b/package.json
index c8a98a4..ce5b710 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@evoscientist/webui",
-  "version": "0.1.4",
+  "version": "0.1.5",
   "description": "Web UI for EvoScientist — a self-evolving AI scientist built on DeepAgents/LangGraph.",
   "author": "Xi Zhang <zacharyzhang2022@gmail.com>",
   "type": "module",
diff --git a/src/app/components/MarkdownContent.tsx b/src/app/components/MarkdownContent.tsx
index a91c6f8..8791022 100644
--- a/src/app/components/MarkdownContent.tsx
+++ b/src/app/components/MarkdownContent.tsx
@@ -62,7 +62,12 @@ export const MarkdownContent = React.memo<MarkdownContentProps>(
               children?: React.ReactNode;
             }) {
               const match = /language-(\w+)/.exec(className || "");
-              const code = String(children).replace(/\n$/, "");
+              const raw = String(children);
+              // Fenced blocks always end with \n; inline code does not. Use
+              // this to distinguish unlanguaged fenced blocks from inline code
+              // so detectFileLink is only called for true inline code.
+              const isBlock = raw.endsWith("\n");
+              const code = raw.replace(/\n$/, "");
               // react-markdown v9 dropped the `inline` prop. Block code carries
               // a `language-*` className from the fenced ```lang form; inline
               // code does not. Treat absence of a language match as inline.
@@ -85,7 +90,7 @@ export const MarkdownContent = React.memo<MarkdownContentProps>(
               // Inline code that names a workspace or memory file becomes a
               // click-to-open link. ChatInterface (or any ancestor) listens
               // for `evosci:open-file` and routes to the right dialog.
-              const link = detectFileLink(code);
+              const link = !isBlock ? detectFileLink(code) : null;
               if (link) {
                 return (
                   <button
diff --git a/src/app/components/ToolApprovalInterrupt.tsx b/src/app/components/ToolApprovalInterrupt.tsx
index de6f643..1fc3254 100644
--- a/src/app/components/ToolApprovalInterrupt.tsx
+++ b/src/app/components/ToolApprovalInterrupt.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import { useState } from "react";
+import { useMemo, useState } from "react";
 import { flushSync } from "react-dom";
 import { Button } from "@/components/ui/button";
 import { Textarea } from "@/components/ui/textarea";
@@ -16,6 +16,30 @@ interface ToolApprovalInterruptProps {
   onSubmitted?: () => void;
 }
 
+function argsToRecord(args: unknown): Record<string, unknown> {
+  return args && typeof args === "object"
+    ? (args as Record<string, unknown>)
+    : {};
+}
+
+function cloneArgs(args: Record<string, unknown>): Record<string, unknown> {
+  try {
+    return JSON.parse(JSON.stringify(args)) as Record<string, unknown>;
+  } catch {
+    return { ...args };
+  }
+}
+
+function formatValue(value: unknown): string {
+  if (typeof value === "string") return value;
+  if (value === undefined) return "undefined";
+  try {
+    return JSON.stringify(value, null, 2) ?? String(value);
+  } catch {
+    return String(value);
+  }
+}
+
 export function ToolApprovalInterrupt({
   actionRequest,
   reviewConfig,
@@ -29,6 +53,10 @@ export function ToolApprovalInterrupt({
   const [showRejectionInput, setShowRejectionInput] = useState(false);
   const [submitted, setSubmitted] = useState(false);
 
+  const actionArgs = useMemo(
+    () => argsToRecord(actionRequest.args),
+    [actionRequest.args]
+  );
   const allowedDecisions = reviewConfig?.allowedDecisions ??
     reviewConfig?.allowed_decisions ?? ["approve", "reject", "edit"];
 
@@ -94,7 +122,7 @@ export function ToolApprovalInterrupt({
 
   const startEditing = () => {
     setIsEditing(true);
-    setEditedArgs(JSON.parse(JSON.stringify(actionRequest.args)));
+    setEditedArgs(cloneArgs(actionArgs));
     setShowRejectionInput(false);
   };
 
@@ -126,6 +154,7 @@ export function ToolApprovalInterrupt({
         <AlertCircle
           size={16}
           className="text-yellow-600 dark:text-yellow-400"
+          aria-hidden="true"
         />
         <span className="text-xs font-semibold uppercase tracking-wider">
           Approval Required
@@ -156,7 +185,7 @@ export function ToolApprovalInterrupt({
               Edit Arguments
             </span>
             <div className="mt-2 space-y-3">
-              {Object.entries(actionRequest.args).map(([key, value]) => (
+              {Object.entries(actionArgs).map(([key, value]) => (
                 <div key={key}>
                   <label className="mb-1 block text-xs font-medium text-foreground">
                     {key}
@@ -166,10 +195,10 @@ export function ToolApprovalInterrupt({
                       editedArgs[key] !== undefined
                         ? typeof editedArgs[key] === "string"
                           ? (editedArgs[key] as string)
-                          : JSON.stringify(editedArgs[key], null, 2)
+                          : formatValue(editedArgs[key])
                         : typeof value === "string"
                         ? value
-                        : JSON.stringify(value, null, 2)
+                        : formatValue(value)
                     }
                     onChange={(e) => updateEditedArg(key, e.target.value)}
                     className="font-mono text-xs"
@@ -188,7 +217,7 @@ export function ToolApprovalInterrupt({
               Arguments
             </span>
             <pre className="mt-2 overflow-x-auto whitespace-pre-wrap break-all rounded-sm border border-border bg-muted/40 p-2 font-mono text-xs text-foreground">
-              {JSON.stringify(actionRequest.args, null, 2)}
+              {formatValue(actionArgs)}
             </pre>
           </div>
         )}
@@ -231,7 +260,10 @@ export function ToolApprovalInterrupt({
               disabled={isLoading}
               className="bg-green-600 text-white hover:bg-green-700 dark:bg-green-600 dark:hover:bg-green-700"
             >
-              <Check size={14} />
+              <Check
+                size={14}
+                aria-hidden="true"
+              />
               {isLoading ? "Saving…" : "Save & Approve"}
             </Button>
           </>
@@ -270,7 +302,10 @@ export function ToolApprovalInterrupt({
                 disabled={isLoading}
                 className="text-destructive hover:bg-destructive/10"
               >
-                <X size={14} />
+                <X
+                  size={14}
+                  aria-hidden="true"
+                />
                 Reject
               </Button>
             )}
@@ -282,7 +317,10 @@ export function ToolApprovalInterrupt({
                 onClick={startEditing}
                 disabled={isLoading}
               >
-                <Pencil size={14} />
+                <Pencil
+                  size={14}
+                  aria-hidden="true"
+                />
                 Edit
               </Button>
             )}
@@ -297,7 +335,10 @@ export function ToolApprovalInterrupt({
                   "dark:bg-green-600 dark:hover:bg-green-700"
                 )}
               >
-                <Check size={14} />
+                <Check
+                  size={14}
+                  aria-hidden="true"
+                />
                 {isLoading ? "Approving…" : "Approve"}
               </Button>
             )}
diff --git a/src/app/components/WorkspaceFileDialog.tsx b/src/app/components/WorkspaceFileDialog.tsx
index 5e17dfb..2c2793d 100644
--- a/src/app/components/WorkspaceFileDialog.tsx
+++ b/src/app/components/WorkspaceFileDialog.tsx
@@ -264,7 +264,10 @@ export const WorkspaceFileDialog = React.memo<{
           <DialogTitle className="sr-only">{path}</DialogTitle>
           <div className="mb-4 flex items-center justify-between gap-3 border-b border-border pb-4">
             <div className="flex min-w-0 items-center gap-2">
-              <FileText className="h-5 w-5 shrink-0 text-[var(--color-text-tertiary)]" />
+              <FileText
+                className="h-5 w-5 shrink-0 text-[var(--color-text-tertiary)]"
+                aria-hidden="true"
+              />
               <span className="overflow-hidden text-ellipsis whitespace-nowrap text-base font-medium text-primary">
                 {path}
               </span>
@@ -284,6 +287,7 @@ export const WorkspaceFileDialog = React.memo<{
                     <Eye
                       size={16}
                       className="mr-1"
+                      aria-hidden="true"
                     />
                     Cancel
                   </Button>
@@ -297,11 +301,13 @@ export const WorkspaceFileDialog = React.memo<{
                       <Loader2
                         size={16}
                         className="mr-1 animate-spin"
+                        aria-hidden="true"
                       />
                     ) : (
                       <Save
                         size={16}
                         className="mr-1"
+                        aria-hidden="true"
                       />
                     )}
                     {saving ? "Saving…" : "Save"}
@@ -321,29 +327,29 @@ export const WorkspaceFileDialog = React.memo<{
                       <Pencil
                         size={16}
                         className="mr-1"
+                        aria-hidden="true"
                       />
                       Edit
                     </Button>
                   )}
-                  <a
-                    href={workspaceFileUrl(path, true)}
-                    download={name}
+                  <Button
+                    variant="ghost"
+                    size="sm"
+                    className="h-8 px-2"
+                    asChild
                   >
-                    <Button
-                      variant="ghost"
-                      size="sm"
-                      className="h-8 px-2"
-                      asChild
+                    <a
+                      href={workspaceFileUrl(path, true)}
+                      download={name}
                     >
-                      <span>
-                        <Download
-                          size={16}
-                          className="mr-1"
-                        />
-                        Download
-                      </span>
-                    </Button>
-                  </a>
+                      <Download
+                        size={16}
+                        className="mr-1"
+                        aria-hidden="true"
+                      />
+                      Download
+                    </a>
+                  </Button>
                   <Button
                     variant="ghost"
                     size="sm"
@@ -357,9 +363,13 @@ export const WorkspaceFileDialog = React.memo<{
                       <Loader2
                         size={16}
                         className="animate-spin"
+                        aria-hidden="true"
                       />
                     ) : (
-                      <Trash2 size={16} />
+                      <Trash2
+                        size={16}
+                        aria-hidden="true"
+                      />
                     )}
                   </Button>
                 </>
@@ -409,25 +419,30 @@ export const WorkspaceFileDialog = React.memo<{
                     ? "This file is too large to preview inline."
                     : "This file type can't be previewed."}
                 </p>
-                <a
-                  href={workspaceFileUrl(path, true)}
-                  download={name}
+                <Button
+                  variant="outline"
+                  size="sm"
+                  asChild
                 >
-                  <Button
-                    variant="outline"
-                    size="sm"
+                  <a
+                    href={workspaceFileUrl(path, true)}
+                    download={name}
                   >
                     <Download
                       size={16}
                       className="mr-1"
+                      aria-hidden="true"
                     />
                     Download file
-                  </Button>
-                </a>
+                  </a>
+                </Button>
               </div>
             ) : loading ? (
               <div className="flex h-full items-center justify-center">
-                <Loader2 className="size-5 animate-spin text-muted-foreground" />
+                <Loader2
+                  className="size-5 animate-spin text-muted-foreground"
+                  aria-hidden="true"
+                />
               </div>
             ) : error ? (
               <div className="flex h-full items-center justify-center p-12">