Redesign all client components with dark theme, polish, and UX improvements

MessageBubble: Replace border-left colored bars with rounded cards featuring
accent strips, category dot indicators, and timestamp display. Use shared
escapeHtml. Render tool_result, hook_progress, and file_snapshot as
preformatted text instead of markdown (avoids expensive marked.parse on
large JSON/log blobs).

ExportButton: Add state machine (idle/exporting/success/error) with animated
icons, gradient backgrounds, and auto-reset timers. Replace alert() with
inline error state.

FilterPanel: Add collapsible panel with category dot colors, enable count
badge, custom checkbox styling, and smooth animations.

SessionList: Replace text loading state with skeleton placeholders. Add
empty state illustration with descriptive text. Style session items as
rounded cards with hover/selected states, glow effects, and staggered
entry animations. Add project name decode explanation comment.

RedactedDivider: Add eye-slash SVG icon, red accent color, and styled
dashed lines replacing plain text divider.

useFilters: Remove unused exports (setAllCategories, setPreset, undoRedaction,
clearAllRedactions, selectAllVisible, getMatchCount) to reduce hook surface
area. Match counting moved to App component for search navigation.

SessionList.test: Update assertions for skeleton loading state and expanded
empty state text.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/client/components/ExportButton.tsx

@@ -1,4 +1,4 @@
-import React, { useState } from "react";
+import React, { useState, useEffect, useRef } from "react";
 import type { SessionDetailResponse } from "../lib/types";
 
 interface Props {
@@ -14,10 +14,17 @@ export function ExportButton({
   redactedMessageUuids,
   autoRedactEnabled,
 }: Props) {
-  const [exporting, setExporting] = useState(false);
+  const [state, setState] = useState<"idle" | "exporting" | "success" | "error">("idle");
+  const timerRef = useRef<ReturnType<typeof setTimeout>>();
+
+  useEffect(() => {
+    return () => {
+      if (timerRef.current) clearTimeout(timerRef.current);
+    };
+  }, []);
 
   async function handleExport() {
-    setExporting(true);
+    setState("exporting");
     try {
       const res = await fetch("/api/export", {
         method: "POST",
@@ -40,21 +47,67 @@ export function ExportButton({
       a.click();
       document.body.removeChild(a);
       URL.revokeObjectURL(url);
+
+      setState("success");
+      timerRef.current = setTimeout(() => setState("idle"), 2000);
     } catch (err) {
       console.error("Export failed:", err);
-      alert("Export failed. Check console for details.");
-    } finally {
-      setExporting(false);
+      setState("error");
+      timerRef.current = setTimeout(() => setState("idle"), 3000);
     }
   }
 
   return (
     <button
       onClick={handleExport}
-      disabled={exporting}
-      className="px-4 py-1.5 text-sm bg-gray-900 text-white rounded-md hover:bg-gray-800 disabled:opacity-50 flex-shrink-0"
+      disabled={state === "exporting"}
+      className={`
+        btn btn-sm flex-shrink-0 gap-1.5 transition-all duration-200
+        ${state === "success" ? "text-white shadow-glow-success" : ""}
+        ${state === "error" ? "text-white" : ""}
+        ${state === "idle" || state === "exporting" ? "btn-primary" : ""}
+      `}
+      style={
+        state === "success"
+          ? { background: "linear-gradient(135deg, #22c55e, #16a34a)" }
+          : state === "error"
+          ? { background: "linear-gradient(135deg, #dc2626, #b91c1c)" }
+          : undefined
+      }
     >
-      {exporting ? "Exporting..." : "Export HTML"}
+      {state === "idle" && (
+        <>
+          <svg className="w-3.5 h-3.5" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
+            <path strokeLinecap="round" strokeLinejoin="round" d="M3 16.5v2.25A2.25 2.25 0 005.25 21h13.5A2.25 2.25 0 0021 18.75V16.5M16.5 12L12 16.5m0 0L7.5 12m4.5 4.5V3" />
+          </svg>
+          Export
+        </>
+      )}
+      {state === "exporting" && (
+        <>
+          <svg className="w-3.5 h-3.5 animate-spin" fill="none" viewBox="0 0 24 24">
+            <circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4" />
+            <path className="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z" />
+          </svg>
+          Exporting...
+        </>
+      )}
+      {state === "success" && (
+        <>
+          <svg className="w-3.5 h-3.5" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
+            <path strokeLinecap="round" strokeLinejoin="round" d="M4.5 12.75l6 6 9-13.5" />
+          </svg>
+          Downloaded
+        </>
+      )}
+      {state === "error" && (
+        <>
+          <svg className="w-3.5 h-3.5" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
+            <path strokeLinecap="round" strokeLinejoin="round" d="M12 9v3.75m9-.75a9 9 0 11-18 0 9 9 0 0118 0zm-9 3.75h.008v.008H12v-.008z" />
+          </svg>
+          Failed
+        </>
+      )}
     </button>
   );
 }

src/client/components/FilterPanel.tsx

@@ -1,6 +1,7 @@
-import React from "react";
+import React, { useState } from "react";
 import type { MessageCategory } from "../lib/types";
 import { ALL_CATEGORIES, CATEGORY_LABELS } from "../lib/types";
+import { CATEGORY_COLORS } from "../lib/constants";
 
 interface Props {
   enabledCategories: Set<MessageCategory>;
@@ -10,38 +11,79 @@ interface Props {
 }
 
 export function FilterPanel({ enabledCategories, onToggle, autoRedactEnabled, onAutoRedactToggle }: Props) {
+  const [collapsed, setCollapsed] = useState(false);
+
+  const enabledCount = enabledCategories.size;
+  const totalCount = ALL_CATEGORIES.length;
+
   return (
-    <div className="p-3">
-      <div className="text-xs font-semibold text-gray-500 uppercase tracking-wider mb-2">
+    <div className="border-t border-border" style={{ background: "linear-gradient(0deg, var(--color-surface-raised) 0%, var(--color-surface) 100%)" }}>
+      <button
+        onClick={() => setCollapsed(!collapsed)}
+        className="w-full flex items-center justify-between px-4 py-3 hover:bg-surface-overlay/50 transition-colors"
+      >
+        <div className="flex items-center gap-2">
+          <span className="text-caption font-semibold text-foreground-muted uppercase tracking-wider">
             Filters
+          </span>
+          <span className="text-caption text-foreground-muted bg-surface-inset px-2 py-0.5 rounded-full tabular-nums border border-border-muted">
+            {enabledCount}/{totalCount}
+          </span>
         </div>
-      <div className="space-y-1">
-        {ALL_CATEGORIES.map((cat) => (
+        <svg
+          className={`w-4 h-4 text-foreground-muted transition-transform duration-200 ${collapsed ? "" : "rotate-180"}`}
+          fill="none"
+          viewBox="0 0 24 24"
+          stroke="currentColor"
+          strokeWidth={2}
+        >
+          <path strokeLinecap="round" strokeLinejoin="round" d="M19.5 8.25l-7.5 7.5-7.5-7.5" />
+        </svg>
+      </button>
+
+      {!collapsed && (
+        <div className="px-4 pb-3 animate-fade-in">
+          <div className="space-y-0.5">
+            {ALL_CATEGORIES.map((cat) => {
+              const colors = CATEGORY_COLORS[cat];
+              const isEnabled = enabledCategories.has(cat);
+              return (
                 <label
                   key={cat}
-            className="flex items-center gap-2 text-sm text-gray-700 cursor-pointer hover:text-gray-900"
+                  className={`
+                    flex items-center gap-2.5 py-1.5 px-2 rounded-md cursor-pointer transition-all duration-150
+                    ${isEnabled ? "hover:bg-surface-overlay/50" : "opacity-40 hover:opacity-65"}
+                  `}
                 >
                   <input
                     type="checkbox"
-              checked={enabledCategories.has(cat)}
+                    checked={isEnabled}
                     onChange={() => onToggle(cat)}
-              className="rounded border-gray-300 text-blue-600 focus:ring-blue-500"
+                    className="custom-checkbox"
                   />
-            <span>{CATEGORY_LABELS[cat]}</span>
+                  <span className={`w-2 h-2 rounded-full flex-shrink-0 ${colors.dot}`} />
+                  <span className="text-body text-foreground-secondary">{CATEGORY_LABELS[cat]}</span>
                 </label>
-        ))}
+              );
+            })}
           </div>
-      <div className="mt-3 pt-3 border-t border-gray-200">
-        <label className="flex items-center gap-2 text-sm text-gray-700 cursor-pointer hover:text-gray-900">
+
+          <div className="mt-3 pt-3 border-t border-border-muted">
+            <label className="flex items-center gap-2.5 py-1.5 px-2 rounded-md cursor-pointer hover:bg-surface-inset transition-colors">
               <input
                 type="checkbox"
                 checked={autoRedactEnabled}
                 onChange={(e) => onAutoRedactToggle(e.target.checked)}
-            className="rounded border-gray-300 text-red-600 focus:ring-red-500"
+                className="custom-checkbox checkbox-danger"
               />
-          <span>Auto-redact sensitive info</span>
+              <svg className="w-3.5 h-3.5 text-red-500 flex-shrink-0" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
+                <path strokeLinecap="round" strokeLinejoin="round" d="M9 12.75L11.25 15 15 9.75m-3-7.036A11.959 11.959 0 013.598 6 11.99 11.99 0 003 9.749c0 5.592 3.824 10.29 9 11.623 5.176-1.332 9-6.03 9-11.622 0-1.31-.21-2.571-.598-3.751h-.152c-3.196 0-6.1-1.248-8.25-3.285z" />
+              </svg>
+              <span className="text-body text-foreground-secondary">Auto-redact sensitive</span>
             </label>
           </div>
         </div>
+      )}
+    </div>
   );
 }

src/client/components/MessageBubble.tsx

@@ -4,6 +4,7 @@ import { CATEGORY_LABELS } from "../lib/types";
 import { CATEGORY_COLORS } from "../lib/constants";
 import { renderMarkdown, highlightSearchText } from "../lib/markdown";
 import { redactMessage } from "../../shared/sensitive-redactor";
+import { escapeHtml } from "../../shared/escape-html";
 
 interface Props {
   message: ParsedMessage;
@@ -16,9 +17,10 @@ interface Props {
 
 /**
  * MessageBubble renders session messages using innerHTML.
- * This is safe here because content comes only from local JSONL session files
+ * SECURITY: This is safe because content comes only from local JSONL session files
  * owned by the user, processed through the `marked` markdown renderer.
  * This is a local-only developer tool, not exposed to untrusted input.
+ * The session files are read from the user's own filesystem (~/.claude/projects/).
  */
 export function MessageBubble({
   message,
@@ -36,41 +38,77 @@ export function MessageBubble({
 
     if (msg.category === "tool_call") {
       const inputHtml = msg.toolInput
-        ? `<pre class="bg-gray-50 p-3 rounded text-xs overflow-x-auto mt-2"><code>${escapeHtml(msg.toolInput)}</code></pre>`
+        ? `<pre class="hljs mt-2"><code>${escapeHtml(msg.toolInput)}</code></pre>`
         : "";
-      const html = `<div class="font-semibold text-amber-800">${escapeHtml(msg.toolName || "Unknown Tool")}</div>${inputHtml}`;
+      const html = `<div class="font-medium ${colors.text}">${escapeHtml(msg.toolName || "Unknown Tool")}</div>${inputHtml}`;
       return searchQuery ? highlightSearchText(html, searchQuery) : html;
     }
+
+    // Structured data categories: render as preformatted text, not markdown.
+    // Avoids expensive marked.parse() on large JSON/log blobs.
+    if (msg.category === "hook_progress" || msg.category === "tool_result" || msg.category === "file_snapshot") {
+      const html = `<pre class="hljs"><code>${escapeHtml(msg.content)}</code></pre>`;
+      return searchQuery ? highlightSearchText(html, searchQuery) : html;
+    }
+
     const html = renderMarkdown(msg.content);
     return searchQuery ? highlightSearchText(html, searchQuery) : html;
-  }, [message, searchQuery, autoRedactEnabled]);
+  }, [message, searchQuery, autoRedactEnabled, colors.text]);
+
+  const timestamp = message.timestamp
+    ? formatTimestamp(message.timestamp)
+    : null;
 
   return (
     <div
       onClick={onToggleRedactionSelection}
       className={`
-        border-l-4 rounded-lg p-4 shadow-sm cursor-pointer transition-all
-        ${colors.border} ${colors.bg}
+        group rounded-xl border bg-surface-raised cursor-pointer
+        transition-all duration-200 relative overflow-hidden
+        ${colors.border}
         ${dimmed ? "message-dimmed" : ""}
         ${selectedForRedaction ? "redaction-selected" : ""}
-        hover:shadow-md
+        hover:shadow-card-hover hover:-translate-y-px
+        shadow-card
       `}
     >
-      <div className="text-xs font-semibold uppercase tracking-wider text-gray-500 mb-2">
+      {/* Category accent strip */}
+      <div className={`absolute left-0 top-0 bottom-0 w-[3px] rounded-l-xl ${colors.dot}`} />
+
+      {/* Header bar */}
+      <div className="flex items-center gap-2 px-4 pl-5 pt-3 pb-1">
+        <span className={`w-1.5 h-1.5 rounded-full flex-shrink-0 ${colors.dot}`} />
+        <span className="text-caption font-semibold uppercase tracking-wider text-foreground-muted">
           {label}
+        </span>
+        {timestamp && (
+          <>
+            <span className="text-border">·</span>
+            <span className="text-caption text-foreground-muted tabular-nums">
+              {timestamp}
+            </span>
+          </>
+        )}
       </div>
-      {/* Content from local user-owned JSONL files, not external/untrusted input */}
+
+      {/* Content — sourced from local user-owned JSONL files, not external/untrusted input */}
       <div
-        className="prose prose-sm max-w-none overflow-wrap-break-word"
+        className="prose-message text-body text-foreground px-4 pl-5 pb-4 pt-1 max-w-none break-words overflow-hidden"
         dangerouslySetInnerHTML={{ __html: renderedHtml }}
       />
     </div>
   );
 }
 
-function escapeHtml(text: string): string {
-  return text
-    .replace(/&/g, "&amp;")
-    .replace(/</g, "&lt;")
-    .replace(/>/g, "&gt;");
+function formatTimestamp(ts: string): string {
+  try {
+    const d = new Date(ts);
+    return d.toLocaleTimeString(undefined, {
+      hour: "2-digit",
+      minute: "2-digit",
+      second: "2-digit",
+    });
+  } catch {
+    return "";
+  }
 }

src/client/components/RedactedDivider.tsx

@@ -2,10 +2,15 @@ import React from "react";
 
 export function RedactedDivider() {
   return (
-    <div className="flex items-center gap-3 py-2 text-gray-400 text-sm">
-      <div className="flex-1 border-t border-dashed border-gray-300" />
-      <span>··· content redacted ···</span>
-      <div className="flex-1 border-t border-dashed border-gray-300" />
+    <div className="flex items-center gap-3 py-3 text-foreground-muted">
+      <div className="flex-1 border-t border-dashed border-red-900/40" />
+      <div className="flex items-center gap-1.5 text-caption">
+        <svg className="w-3.5 h-3.5 text-red-400" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
+          <path strokeLinecap="round" strokeLinejoin="round" d="M3.98 8.223A10.477 10.477 0 001.934 12C3.226 16.338 7.244 19.5 12 19.5c.993 0 1.953-.138 2.863-.395M6.228 6.228A10.45 10.45 0 0112 4.5c4.756 0 8.773 3.162 10.065 7.498a10.523 10.523 0 01-4.293 5.774M6.228 6.228L3 3m3.228 3.228l3.65 3.65m7.894 7.894L21 21m-3.228-3.228l-3.65-3.65m0 0a3 3 0 10-4.243-4.243m4.242 4.242L9.88 9.88" />
+        </svg>
+        <span className="text-red-400 font-medium">content redacted</span>
+      </div>
+      <div className="flex-1 border-t border-dashed border-red-900/40" />
     </div>
   );
 }

src/client/components/SessionList.test.tsx

@@ -94,11 +94,13 @@ describe("SessionList", () => {
     expect(screen.getByText(/all projects/i)).toBeInTheDocument();
   });
 
-  it("shows loading state", () => {
-    render(
+  it("shows loading state with skeleton placeholders", () => {
+    const { container } = render(
       <SessionList sessions={[]} loading={true} onSelect={vi.fn()} />
     );
-    expect(screen.getByText("Loading sessions...")).toBeInTheDocument();
+    // Loading state now uses skeleton placeholders instead of text
+    const skeletons = container.querySelectorAll(".skeleton");
+    expect(skeletons.length).toBeGreaterThan(0);
   });
 
   it("shows empty state", () => {
@@ -106,6 +108,7 @@ describe("SessionList", () => {
       <SessionList sessions={[]} loading={false} onSelect={vi.fn()} />
     );
     expect(screen.getByText("No sessions found")).toBeInTheDocument();
+    expect(screen.getByText("Sessions will appear here once created")).toBeInTheDocument();
   });
 
   it("calls onSelect when clicking a session", () => {

src/client/components/SessionList.tsx

@@ -31,56 +31,83 @@ export function SessionList({ sessions, loading, selectedId, onSelect }: Props)
 
   if (loading) {
     return (
-      <div className="p-4 text-sm text-gray-500">Loading sessions...</div>
-    );
-  }
-
-  if (sessions.length === 0) {
-    return (
-      <div className="p-4 text-sm text-gray-500">No sessions found</div>
-    );
-  }
-
-  // Phase 2: Session list for selected project
-  if (selectedProject !== null) {
-    const projectSessions = grouped.get(selectedProject) || [];
-    return (
-      <div className="py-2">
-        <button
-          onClick={() => setSelectedProject(null)}
-          className="w-full text-left px-4 py-2 text-sm text-blue-600 hover:text-blue-800 hover:bg-gray-50 transition-colors flex items-center gap-1"
-        >
-          <span>←</span>
-          <span>All Projects</span>
-        </button>
-        <div className="px-4 py-2 text-xs font-semibold text-gray-500 uppercase tracking-wider bg-gray-50">
-          {formatProjectName(selectedProject)}
+      <div className="p-4 space-y-3">
+        {[...Array(5)].map((_, i) => (
+          <div key={i} className="space-y-2 px-1">
+            <div className="skeleton h-4 w-3/4" />
+            <div className="skeleton h-3 w-1/2" />
           </div>
-        {projectSessions.map((session) => (
-          <button
-            key={session.id}
-            onClick={() => onSelect(session.id)}
-            className={`w-full text-left px-4 py-3 border-b border-gray-100 hover:bg-gray-50 transition-colors ${
-              selectedId === session.id ? "bg-blue-50 border-l-2 border-l-blue-500" : ""
-            }`}
-          >
-            <div className="text-sm font-medium text-gray-900 truncate">
-              {session.summary || session.firstPrompt || "Untitled Session"}
-            </div>
-            <div className="flex items-center gap-2 mt-1 text-xs text-gray-500">
-              <span>{formatDate(session.modified || session.created)}</span>
-              <span>·</span>
-              <span>{session.messageCount} msgs</span>
-            </div>
-          </button>
         ))}
       </div>
     );
   }
 
-  // Phase 1: Project list
+  if (sessions.length === 0) {
     return (
-    <div className="py-2">
+      <div className="flex flex-col items-center justify-center py-12 px-6 text-center">
+        <div className="w-10 h-10 rounded-xl bg-surface-inset flex items-center justify-center mb-3">
+          <svg className="w-5 h-5 text-foreground-muted" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}>
+            <path strokeLinecap="round" strokeLinejoin="round" d="M20.25 8.511c.884.284 1.5 1.128 1.5 2.097v4.286c0 1.136-.847 2.1-1.98 2.193-.34.027-.68.052-1.02.072v3.091l-3-3c-1.354 0-2.694-.055-4.02-.163a2.115 2.115 0 01-.825-.242m9.345-8.334a2.126 2.126 0 00-.476-.095 48.64 48.64 0 00-8.048 0c-1.131.094-1.976 1.057-1.976 2.192v4.286c0 .837.46 1.58 1.155 1.951m9.345-8.334V6.637c0-1.621-1.152-3.026-2.76-3.235A48.455 48.455 0 0011.25 3c-2.115 0-4.198.137-6.24.402-1.608.209-2.76 1.614-2.76 3.235v6.226c0 1.621 1.152 3.026 2.76 3.235.577.075 1.157.14 1.74.194V21l4.155-4.155" />
+          </svg>
+        </div>
+        <p className="text-body font-medium text-foreground-secondary">No sessions found</p>
+        <p className="text-caption text-foreground-muted mt-1">Sessions will appear here once created</p>
+      </div>
+    );
+  }
+
+  // Session list for selected project
+  if (selectedProject !== null) {
+    const projectSessions = grouped.get(selectedProject) || [];
+    return (
+      <div className="animate-slide-in">
+        <button
+          onClick={() => setSelectedProject(null)}
+          className="w-full text-left px-4 py-2.5 text-caption font-medium text-accent hover:text-accent-dark hover:bg-surface-overlay flex items-center gap-1.5 border-b border-border-muted transition-colors"
+        >
+          <svg className="w-3.5 h-3.5" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
+            <path strokeLinecap="round" strokeLinejoin="round" d="M15.75 19.5L8.25 12l7.5-7.5" />
+          </svg>
+          <span>All Projects</span>
+        </button>
+        <div className="px-4 py-2 text-caption font-semibold text-foreground-muted uppercase tracking-wider border-b border-border-muted" style={{ background: "var(--color-surface-inset)" }}>
+          {formatProjectName(selectedProject)}
+        </div>
+        <div className="py-1">
+          {projectSessions.map((session, idx) => {
+            const isSelected = selectedId === session.id;
+            return (
+              <button
+                key={session.id}
+                onClick={() => onSelect(session.id)}
+                className={`
+                  w-full text-left mx-2 my-0.5 px-3 py-2.5 rounded-lg transition-all duration-200
+                  ${isSelected
+                    ? "bg-accent-light shadow-glow-accent ring-1 ring-accent/25"
+                    : "hover:bg-surface-overlay"
+                  }
+                `}
+                style={{ width: "calc(100% - 1rem)", animationDelay: `${idx * 30}ms` }}
+              >
+                <div className={`text-body font-medium truncate ${isSelected ? "text-accent-dark" : "text-foreground"}`}>
+                  {session.summary || session.firstPrompt || "Untitled Session"}
+                </div>
+                <div className="flex items-center gap-1.5 mt-1 text-caption text-foreground-muted">
+                  <span>{formatDate(session.modified || session.created)}</span>
+                  <span className="text-border">·</span>
+                  <span className="tabular-nums">{session.messageCount} msgs</span>
+                </div>
+              </button>
+            );
+          })}
+        </div>
+      </div>
+    );
+  }
+
+  // Project list
+  return (
+    <div className="py-1 animate-fade-in">
       {[...grouped.entries()].map(([project, projectSessions]) => {
         const latest = projectSessions.reduce((a, b) =>
           (a.modified || a.created) > (b.modified || b.created) ? a : b
@@ -90,14 +117,20 @@ export function SessionList({ sessions, loading, selectedId, onSelect }: Props)
           <button
             key={project}
             onClick={() => setSelectedProject(project)}
-            className="w-full text-left px-4 py-3 border-b border-gray-100 hover:bg-gray-50 transition-colors"
+            className="w-full text-left mx-2 my-0.5 px-3 py-2.5 rounded-lg hover:bg-surface-overlay transition-all duration-200 group"
+            style={{ width: "calc(100% - 1rem)" }}
           >
-            <div className="text-sm font-medium text-gray-900 truncate">
+            <div className="flex items-center justify-between">
+              <div className="text-body font-medium text-foreground truncate">
                 {formatProjectName(project)}
               </div>
-            <div className="flex items-center gap-2 mt-1 text-xs text-gray-500">
-              <span>{count} {count === 1 ? "session" : "sessions"}</span>
-              <span>·</span>
+              <svg className="w-4 h-4 text-foreground-muted opacity-0 group-hover:opacity-100 transition-opacity flex-shrink-0" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
+                <path strokeLinecap="round" strokeLinejoin="round" d="M8.25 4.5l7.5 7.5-7.5 7.5" />
+              </svg>
+            </div>
+            <div className="flex items-center gap-1.5 mt-1 text-caption text-foreground-muted">
+              <span className="tabular-nums">{count} {count === 1 ? "session" : "sessions"}</span>
+              <span className="text-border">·</span>
               <span>{formatDate(latest.modified || latest.created)}</span>
             </div>
           </button>
@@ -107,6 +140,13 @@ export function SessionList({ sessions, loading, selectedId, onSelect }: Props)
   );
 }
 
+/**
+ * Best-effort decode of Claude Code's project directory name back to a path.
+ * Claude encodes project paths by replacing '/' with '-', but this is lossy:
+ * a path like /home/user/my-cool-app encodes as -home-user-my-cool-app and
+ * decodes as /home/user/my/cool/app (hyphens in the original name are lost).
+ * There is no way to distinguish path separators from literal hyphens.
+ */
 function formatProjectName(project: string): string {
   if (project.startsWith("-")) {
     return project.replace(/^-/, "/").replace(/-/g, "/");

src/client/hooks/useFilters.ts

@@ -5,7 +5,6 @@ import { ALL_CATEGORIES, DEFAULT_HIDDEN_CATEGORIES } from "../lib/types";
 interface FilterState {
   enabledCategories: Set<MessageCategory>;
   toggleCategory: (cat: MessageCategory) => void;
-  setAllCategories: (enabled: boolean) => void;
   filterMessages: (messages: ParsedMessage[]) => ParsedMessage[];
   searchQuery: string;
   setSearchQuery: (q: string) => void;
@@ -14,7 +13,6 @@ interface FilterState {
   toggleRedactionSelection: (uuid: string) => void;
   confirmRedaction: () => void;
   clearRedactionSelection: () => void;
-  getMatchCount: (messages: ParsedMessage[]) => number;
   autoRedactEnabled: boolean;
   setAutoRedactEnabled: (enabled: boolean) => void;
 }
@@ -50,18 +48,6 @@ export function useFilters(): FilterState {
     });
   }, []);
 
-  const setAllCategories = useCallback((enabled: boolean) => {
-    if (enabled) {
-      setEnabledCategories(new Set(ALL_CATEGORIES));
-    } else {
-      setEnabledCategories(new Set());
-    }
-  }, []);
-
-  const setPreset = useCallback((categories: MessageCategory[]) => {
-    setEnabledCategories(new Set(categories));
-  }, []);
-
   const toggleRedactionSelection = useCallback((uuid: string) => {
     setSelectedForRedaction((prev) => {
       const next = new Set(prev);
@@ -74,7 +60,8 @@ export function useFilters(): FilterState {
     });
   }, []);
 
-  // Fix #9: Use functional updater to avoid stale closure over selectedForRedaction
+  // Uses functional updater to read latest selectedForRedaction without stale closure.
+  // Nested setState is safe in React 18+ with automatic batching.
   const confirmRedaction = useCallback(() => {
     setSelectedForRedaction((currentSelected) => {
       setRedactedUuids((prev) => {
@@ -92,24 +79,6 @@ export function useFilters(): FilterState {
     setSelectedForRedaction(new Set());
   }, []);
 
-  const undoRedaction = useCallback((uuid: string) => {
-    setRedactedUuids((prev) => {
-      const next = new Set(prev);
-      next.delete(uuid);
-      return next;
-    });
-  }, []);
-
-  const clearAllRedactions = useCallback(() => {
-    setRedactedUuids(new Set());
-  }, []);
-
-  const selectAllVisible = useCallback((uuids: string[]) => {
-    setSelectedForRedaction(new Set(uuids));
-  }, []);
-
-  // Fix #1: filterMessages is now a pure function - no setState calls during render.
-  // Match count is computed separately via getMatchCount.
   const filterMessages = useCallback(
     (messages: ParsedMessage[]): ParsedMessage[] => {
       return messages.filter(
@@ -119,24 +88,10 @@ export function useFilters(): FilterState {
     [enabledCategories, redactedUuids]
   );
 
-  // Derive match count from filtered messages + search query without setState
-  const getMatchCount = useCallback(
-    (messages: ParsedMessage[]): number => {
-      if (!searchQuery) return 0;
-      const lowerQuery = searchQuery.toLowerCase();
-      return messages.filter((m) =>
-        m.content.toLowerCase().includes(lowerQuery)
-      ).length;
-    },
-    [searchQuery]
-  );
-
   return useMemo(
     () => ({
       enabledCategories,
       toggleCategory,
-      setAllCategories,
-      setPreset,
       filterMessages,
       searchQuery,
       setSearchQuery,
@@ -145,18 +100,12 @@ export function useFilters(): FilterState {
       toggleRedactionSelection,
       confirmRedaction,
       clearRedactionSelection,
-      undoRedaction,
-      clearAllRedactions,
-      selectAllVisible,
-      getMatchCount,
       autoRedactEnabled,
       setAutoRedactEnabled,
     }),
     [
       enabledCategories,
       toggleCategory,
-      setAllCategories,
-      setPreset,
       filterMessages,
       searchQuery,
       redactedUuids,
@@ -164,11 +113,8 @@ export function useFilters(): FilterState {
       toggleRedactionSelection,
       confirmRedaction,
       clearRedactionSelection,
-      undoRedaction,
-      clearAllRedactions,
-      selectAllVisible,
-      getMatchCount,
       autoRedactEnabled,
+      // setSearchQuery and setAutoRedactEnabled are useState setters (stable identity)
     ]
   );
 }