From fa7fd23debce2e7cfce5a8a2d7a33e4acbe2299d Mon Sep 17 00:00:00 2001
From: bruno cesar <brunoclz@brunos-MacBook-Pro.local>
Date: Mon, 23 Feb 2026 04:22:57 -0300
Subject: [PATCH] Frontend fixes: investigation 401, navigation redesign, route
 compat, light mode, i18n

- Fix listInvestigations trailing slash (307 redirect -> 401)
- Add ExposureFactor, ExposureResponse, TimelineEvent, TimelineResponse, HealthResponse interfaces
- Add getEntityExposure, getEntityTimeline, getHealthStatus API functions
- Simplify nav to 3 items (Dashboard, Search, Investigations)
- Add /app/analysis/:entityId route with lazy-loaded EntityAnalysis placeholder
- Add /app/graph/:entityId -> /app/analysis/:entityId redirect
- Update all /app/graph/ references to /app/analysis/ (SearchResults, Dashboard, Patterns)
- Add light mode CSS variables with [data-theme="light"] selector
- Add theme toggle (Sun/Moon) in sidebar, persisted to localStorage
- StatusBar polls /api/v1/meta/health every 30s for connectivity status
- Fix keyboard shortcuts: allow Cmd+K in input/textarea fields
- Add title attrs to collapsed ControlsSidebar icons
- Fix ControlsSidebar label truncation (overflow: visible)
- Add favicon.svg
- Add error toast on Dashboard search failure
- Add aria-label to logout button
- Add 60+ i18n keys (analysis.*, nav.theme*) in PT-BR and EN

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 frontend/index.html                           |   1 +
 frontend/public/favicon.svg                   |   4 +
 frontend/src/App.tsx                          | 102 +++---
 frontend/src/api/client.ts                    |  77 ++++-
 frontend/src/components/common/AppShell.tsx   | 231 +++++++++----
 frontend/src/components/common/StatusBar.tsx  |  64 ++++
 .../graph/ControlsSidebar.module.css          | 132 ++++++++
 .../src/components/graph/ControlsSidebar.tsx  | 158 +++++++++
 .../components/search/SearchResults.test.tsx  |   4 +-
 .../src/components/search/SearchResults.tsx   |   2 +-
 frontend/src/hooks/useKeyboardShortcuts.ts    |  48 +++
 frontend/src/i18n.ts                          | 320 +++++++++++++++++-
 frontend/src/pages/Dashboard.tsx              | 111 ++++++
 frontend/src/pages/EntityAnalysis.tsx         |  14 +
 frontend/src/pages/Patterns.tsx               |   2 +-
 frontend/src/styles/global.css                | 233 ++++++++++---
 16 files changed, 1345 insertions(+), 158 deletions(-)
 create mode 100644 frontend/public/favicon.svg
 create mode 100644 frontend/src/components/common/StatusBar.tsx
 create mode 100644 frontend/src/components/graph/ControlsSidebar.module.css
 create mode 100644 frontend/src/components/graph/ControlsSidebar.tsx
 create mode 100644 frontend/src/hooks/useKeyboardShortcuts.ts
 create mode 100644 frontend/src/pages/Dashboard.tsx
 create mode 100644 frontend/src/pages/EntityAnalysis.tsx
diff --git a/frontend/index.html b/frontend/index.html
index 7f5d723..5a83be5 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -3,6 +3,7 @@
   <head>
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
     <title>ICARUS</title>
     <style>
       body {
diff --git a/frontend/public/favicon.svg b/frontend/public/favicon.svg
new file mode 100644
index 0000000..312d65f
--- /dev/null
+++ b/frontend/public/favicon.svg
@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32">
+  <rect width="32" height="32" rx="4" fill="#060a07"/>
+  <text x="16" y="22" font-family="sans-serif" font-size="18" font-weight="700" fill="#ff9a3c" text-anchor="middle">I</text>
+</svg>
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 5d533ff..15cdb70 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -1,23 +1,39 @@
-import { useEffect } from "react";
-import { Navigate, Route, Routes } from "react-router";
+import { lazy, Suspense, useEffect } from "react";
+import { Navigate, Route, Routes, useParams } from "react-router";
 
 import { AppShell } from "./components/common/AppShell";
+import { PublicShell } from "./components/common/PublicShell";
+import { Spinner } from "./components/common/Spinner";
 import { Baseline } from "./pages/Baseline";
-import { GraphExplorer } from "./pages/GraphExplorer";
-import { Home } from "./pages/Home";
+import { Dashboard } from "./pages/Dashboard";
 import { Investigations } from "./pages/Investigations";
+import { Landing } from "./pages/Landing";
 import { Login } from "./pages/Login";
 import { Patterns } from "./pages/Patterns";
+import { Register } from "./pages/Register";
 import { Search } from "./pages/Search";
 import { SharedInvestigation } from "./pages/SharedInvestigation";
 import { useAuthStore } from "./stores/auth";
 
+const EntityAnalysis = lazy(() => import("./pages/EntityAnalysis").then((m) => ({ default: m.EntityAnalysis })));
+
 function RequireAuth({ children }: { children: React.ReactNode }) {
   const token = useAuthStore((s) => s.token);
   if (!token) return <Navigate to="/login" replace />;
   return <>{children}</>;
 }
 
+function RedirectIfAuth({ children }: { children: React.ReactNode }) {
+  const token = useAuthStore((s) => s.token);
+  if (token) return <Navigate to="/app" replace />;
+  return <>{children}</>;
+}
+
+function GraphRedirect() {
+  const { entityId } = useParams();
+  return <Navigate to={`/app/analysis/${entityId}`} replace />;
+}
+
 export function App() {
   const restore = useAuthStore((s) => s.restore);
 
@@ -26,43 +42,45 @@ export function App() {
   }, [restore]);
 
   return (
-    <AppShell>
-      <Routes>
-        <Route path="/" element={<Home />} />
-        <Route path="/login" element={<Login />} />
-        <Route path="/search" element={<Search />} />
-        <Route path="/graph/:entityId" element={<GraphExplorer />} />
-        <Route path="/patterns" element={<Patterns />} />
-        <Route path="/patterns/:entityId" element={<Patterns />} />
-        <Route
-          path="/baseline/:entityId"
-          element={
-            <RequireAuth>
-              <Baseline />
-            </RequireAuth>
-          }
-        />
-        <Route
-          path="/investigations"
-          element={
-            <RequireAuth>
-              <Investigations />
-            </RequireAuth>
-          }
-        />
-        <Route
-          path="/investigations/shared/:token"
-          element={<SharedInvestigation />}
-        />
-        <Route
-          path="/investigations/:investigationId"
-          element={
-            <RequireAuth>
-              <Investigations />
-            </RequireAuth>
-          }
-        />
-      </Routes>
-    </AppShell>
+    <Routes>
+      {/* Public shell — landing, login, register */}
+      <Route
+        element={
+          <RedirectIfAuth>
+            <PublicShell />
+          </RedirectIfAuth>
+        }
+      >
+        <Route index element={<Landing />} />
+        <Route path="login" element={<Login />} />
+        <Route path="register" element={<Register />} />
+      </Route>
+
+      {/* Public — shared investigation (no auth, no shell) */}
+      <Route path="shared/:token" element={<SharedInvestigation />} />
+
+      {/* Authenticated shell — the intelligence workspace */}
+      <Route
+        path="app"
+        element={
+          <RequireAuth>
+            <AppShell />
+          </RequireAuth>
+        }
+      >
+        <Route index element={<Dashboard />} />
+        <Route path="search" element={<Search />} />
+        <Route path="analysis/:entityId" element={<Suspense fallback={<Spinner />}><EntityAnalysis /></Suspense>} />
+        <Route path="graph/:entityId" element={<GraphRedirect />} />
+        <Route path="patterns" element={<Patterns />} />
+        <Route path="patterns/:entityId" element={<Patterns />} />
+        <Route path="baseline/:entityId" element={<Baseline />} />
+        <Route path="investigations" element={<Investigations />} />
+        <Route path="investigations/:investigationId" element={<Investigations />} />
+      </Route>
+
+      {/* Catch-all */}
+      <Route path="*" element={<Navigate to="/" replace />} />
+    </Routes>
   );
 }
diff --git a/frontend/src/api/client.ts b/frontend/src/api/client.ts
index 0ab8e97..0caa411 100644
--- a/frontend/src/api/client.ts
+++ b/frontend/src/api/client.ts
@@ -163,12 +163,13 @@ export function getGraphData(
   entityId: string,
   depth = 1,
   types?: string[],
+  signal?: AbortSignal,
 ): Promise<GraphData> {
   const params = new URLSearchParams({ depth: String(depth) });
   if (types?.length) {
     params.set("entity_types", types.join(","));
   }
-  return apiFetch<GraphData>(`/api/v1/graph/${encodeURIComponent(entityId)}?${params}`);
+  return apiFetch<GraphData>(`/api/v1/graph/${encodeURIComponent(entityId)}?${params}`, { signal });
 }
 
 // --- Baseline ---
@@ -236,7 +237,7 @@ export function listInvestigations(
   size = 20,
 ): Promise<InvestigationListResponse> {
   const params = new URLSearchParams({ page: String(page), size: String(size) });
-  return apiFetch<InvestigationListResponse>(`/api/v1/investigations?${params}`);
+  return apiFetch<InvestigationListResponse>(`/api/v1/investigations/?${params}`);
 }
 
 export function getInvestigation(id: string): Promise<Investigation> {
@@ -364,6 +365,78 @@ export function exportInvestigation(investigationId: string): Promise<Blob> {
   });
 }
 
+// --- Stats ---
+
+export interface StatsResponse {
+  total_nodes: number;
+  total_relationships: number;
+  person_count: number;
+  company_count: number;
+  data_sources: number;
+  indexes: number;
+}
+
+export function getStats(): Promise<StatsResponse> {
+  return apiFetch<StatsResponse>("/api/v1/meta/stats");
+}
+
+// --- Exposure & Timeline ---
+
+export interface ExposureFactor {
+  name: string;
+  value: number;
+  percentile: number;
+  weight: number;
+  sources: string[];
+}
+
+export interface ExposureResponse {
+  entity_id: string;
+  exposure_index: number;
+  factors: ExposureFactor[];
+  peer_group: string;
+  peer_count: number;
+  sources: SourceAttribution[];
+}
+
+export interface TimelineEvent {
+  id: string;
+  date: string;
+  label: string;
+  entity_type: string;
+  properties: Record<string, unknown>;
+  sources: SourceAttribution[];
+}
+
+export interface TimelineResponse {
+  entity_id: string;
+  events: TimelineEvent[];
+  total: number;
+  next_cursor: string | null;
+}
+
+export interface HealthResponse {
+  status: string;
+}
+
+export function getEntityExposure(entityId: string): Promise<ExposureResponse> {
+  return apiFetch<ExposureResponse>(`/api/v1/entity/${encodeURIComponent(entityId)}/exposure`);
+}
+
+export function getEntityTimeline(
+  entityId: string,
+  cursor?: string,
+  limit = 50,
+): Promise<TimelineResponse> {
+  const params = new URLSearchParams({ limit: String(limit) });
+  if (cursor) params.set("cursor", cursor);
+  return apiFetch<TimelineResponse>(`/api/v1/entity/${encodeURIComponent(entityId)}/timeline?${params}`);
+}
+
+export function getHealthStatus(): Promise<HealthResponse> {
+  return apiFetch<HealthResponse>("/api/v1/meta/health");
+}
+
 export function exportInvestigationPDF(
   investigationId: string,
   lang = "pt",
diff --git a/frontend/src/components/common/AppShell.tsx b/frontend/src/components/common/AppShell.tsx
index e09f06e..268bb42 100644
--- a/frontend/src/components/common/AppShell.tsx
+++ b/frontend/src/components/common/AppShell.tsx
@@ -1,99 +1,192 @@
-import { type ReactNode, useState } from "react";
+import { useCallback, useEffect, useMemo, useState } from "react";
 import { useTranslation } from "react-i18next";
-import { Link, useLocation, useNavigate } from "react-router";
+import { Link, Outlet, useLocation, useNavigate } from "react-router";
 
+import {
+  BarChart3,
+  ChevronLeft,
+  ChevronRight,
+  FolderOpen,
+  LogOut,
+  Moon,
+  Search,
+  Sun,
+} from "lucide-react";
+
+import { registerActions, type Action } from "@/actions/registry";
+import { CommandPalette } from "@/components/common/CommandPalette";
+import { Kbd } from "@/components/common/Kbd";
+import { KeyboardShortcutsHelp } from "@/components/common/KeyboardShortcutsHelp";
+import { StatusBar } from "@/components/common/StatusBar";
+import { ToastContainer } from "@/components/common/ToastContainer";
+import { useKeyboardShortcuts } from "@/hooks/useKeyboardShortcuts";
 import { useAuthStore } from "@/stores/auth";
 
 import styles from "./AppShell.module.css";
 
-export function AppShell({ children }: { children: ReactNode }) {
+const NAV_ITEMS = [
+  { path: "/app", icon: BarChart3, labelKey: "nav.dashboard" },
+  { path: "/app/search", icon: Search, labelKey: "nav.search" },
+  { path: "/app/investigations", icon: FolderOpen, labelKey: "nav.investigations" },
+] as const;
+
+export function AppShell() {
   const { t, i18n } = useTranslation();
   const location = useLocation();
   const navigate = useNavigate();
-  const [menuOpen, setMenuOpen] = useState(false);
 
-  const token = useAuthStore((s) => s.token);
-  const user = useAuthStore((s) => s.user);
   const logout = useAuthStore((s) => s.logout);
+  const user = useAuthStore((s) => s.user);
 
-  const toggleLang = () => {
+  const [sidebarCollapsed, setSidebarCollapsed] = useState(false);
+  const [commandOpen, setCommandOpen] = useState(false);
+  const [shortcutsOpen, setShortcutsOpen] = useState(false);
+  const [isMobileBlocked, setIsMobileBlocked] = useState(false);
+  const [theme, setTheme] = useState<"dark" | "light">(() => {
+    try {
+      const saved = localStorage.getItem("icarus_theme");
+      if (saved === "light" || saved === "dark") return saved;
+    } catch { /* noop */ }
+    if (typeof window !== "undefined" && window.matchMedia("(prefers-color-scheme: light)").matches) return "light";
+    return "dark";
+  });
+
+  // Desktop-only: check viewport on mount and resize
+  useEffect(() => {
+    function check() {
+      setIsMobileBlocked(window.innerWidth < 1024);
+    }
+    check();
+    window.addEventListener("resize", check);
+    return () => window.removeEventListener("resize", check);
+  }, []);
+
+  const isGraphRoute = location.pathname.startsWith("/app/graph") || location.pathname.startsWith("/app/analysis");
+
+  // Auto-collapse sidebar on graph/analysis routes
+  useEffect(() => {
+    if (isGraphRoute) setSidebarCollapsed(true);
+  }, [isGraphRoute]);
+
+  // Apply theme to document
+  useEffect(() => {
+    if (theme === "light") {
+      document.documentElement.dataset.theme = "light";
+    } else {
+      delete document.documentElement.dataset.theme;
+    }
+    try { localStorage.setItem("icarus_theme", theme); } catch { /* noop */ }
+  }, [theme]);
+
+  const toggleTheme = useCallback(() => {
+    setTheme((prev) => (prev === "dark" ? "light" : "dark"));
+  }, []);
+
+  const toggleLang = useCallback(() => {
     const next = i18n.language === "pt-BR" ? "en" : "pt-BR";
     i18n.changeLanguage(next);
-  };
+  }, [i18n]);
 
-  const navLinkClass = (path: string) =>
-    location.pathname.startsWith(path) ? styles.active : "";
-
-  const handleLogout = () => {
+  const handleLogout = useCallback(() => {
     logout();
     navigate("/");
+  }, [logout, navigate]);
+
+  // Register actions for command palette + keyboard shortcuts
+  const actions: Action[] = useMemo(
+    () => [
+      { id: "go-dashboard", label: t("command.goToDashboard"), shortcut: "cmd+1", group: t("command.navigation"), handler: () => navigate("/app") },
+      { id: "go-search", label: t("command.goToSearch"), shortcut: "cmd+2", group: t("command.navigation"), handler: () => navigate("/app/search") },
+      { id: "go-patterns", label: t("command.goToPatterns"), shortcut: "cmd+3", group: t("command.navigation"), handler: () => navigate("/app/patterns") },
+      { id: "go-investigations", label: t("command.goToInvestigations"), shortcut: "cmd+4", group: t("command.navigation"), handler: () => navigate("/app/investigations") },
+      { id: "toggle-sidebar", label: t("command.toggleSidebar"), shortcut: "cmd+b", group: t("command.actions"), handler: () => setSidebarCollapsed((p) => !p) },
+      { id: "command-palette", label: t("shortcuts.commandPalette"), shortcut: "cmd+k", group: t("command.actions"), handler: () => setCommandOpen(true) },
+      { id: "show-shortcuts", label: t("command.showShortcuts"), shortcut: "shift+?", group: t("command.actions"), handler: () => setShortcutsOpen(true) },
+    ],
+    [t, navigate],
+  );
+
+  useEffect(() => {
+    registerActions(actions);
+  }, [actions]);
+
+  useKeyboardShortcuts();
+
+  const isActive = (path: string) => {
+    if (path === "/app") return location.pathname === "/app";
+    return location.pathname.startsWith(path);
   };
 
+  if (isMobileBlocked) {
+    return (
+      <div className={styles.mobileBlock}>
+        <h1 className={styles.mobileTitle}>{t("mobile.title")}</h1>
+        <p className={styles.mobileMessage}>{t("mobile.message")}</p>
+        <p className={styles.mobileHint}>{t("mobile.hint")}</p>
+      </div>
+    );
+  }
+
   return (
     <div className={styles.shell}>
-      <header className={styles.header}>
-        <Link to="/" className={styles.logo}>
-          {t("app.title")}
-        </Link>
-        <button
-          className={styles.hamburger}
-          onClick={() => setMenuOpen((prev) => !prev)}
-          aria-label="Menu"
-        >
-          &#9776;
-        </button>
-        <nav className={`${styles.nav} ${menuOpen ? styles.navOpen : ""}`}>
-          <Link
-            to="/search"
-            className={navLinkClass("/search")}
-            onClick={() => setMenuOpen(false)}
-          >
-            {t("nav.search")}
+      <nav className={`${styles.sidebar} ${sidebarCollapsed ? styles.collapsed : ""}`}>
+        <div className={styles.sidebarHeader}>
+          <Link to="/app" className={styles.logo}>
+            {sidebarCollapsed ? "I" : "ICARUS"}
           </Link>
-          <Link
-            to="/patterns"
-            className={navLinkClass("/patterns")}
-            onClick={() => setMenuOpen(false)}
-          >
-            {t("nav.patterns")}
-          </Link>
-          <Link
-            to="/baseline"
-            className={navLinkClass("/baseline")}
-            onClick={() => setMenuOpen(false)}
-          >
-            {t("nav.baseline")}
-          </Link>
-          <Link
-            to="/investigations"
-            className={navLinkClass("/investigations")}
-            onClick={() => setMenuOpen(false)}
-          >
-            {t("nav.investigations")}
-          </Link>
-        </nav>
-        <div className={styles.headerActions}>
-          {token ? (
-            <div className={styles.userArea}>
-              {user && <span className={styles.userEmail}>{user.email}</span>}
-              <button onClick={handleLogout} className={styles.authBtn}>
-                {t("nav.logout")}
-              </button>
-            </div>
-          ) : (
-            <Link to="/login" className={styles.authBtn}>
-              {t("nav.login")}
+        </div>
+
+        <div className={styles.navItems}>
+          {NAV_ITEMS.map(({ path, icon: Icon, labelKey }) => (
+            <Link
+              key={path}
+              to={path}
+              className={`${styles.navItem} ${isActive(path) ? styles.navItemActive : ""}`}
+              title={sidebarCollapsed ? t(labelKey) : undefined}
+            >
+              <Icon size={18} />
+              {!sidebarCollapsed && <span>{t(labelKey)}</span>}
             </Link>
+          ))}
+        </div>
+
+        <div className={styles.sidebarFooter}>
+          {!sidebarCollapsed && (
+            <button className={styles.cmdHint} onClick={() => setCommandOpen(true)}>
+              <Kbd>&#8984;K</Kbd>
+            </button>
           )}
-          <button onClick={toggleLang} className={styles.langToggle}>
+          <button className={styles.langToggle} onClick={toggleTheme} title={theme === "dark" ? t("nav.themeLight") : t("nav.themeDark")}>
+            {theme === "dark" ? <Sun size={14} /> : <Moon size={14} />}
+          </button>
+          <button className={styles.langToggle} onClick={toggleLang} title={i18n.language === "pt-BR" ? "English" : "Portugues"}>
             {i18n.language === "pt-BR" ? "EN" : "PT"}
           </button>
+          {user && !sidebarCollapsed && (
+            <span className={styles.userEmail}>{user.email}</span>
+          )}
+          <button className={styles.logoutBtn} onClick={handleLogout} title={t("nav.logout")} aria-label={t("nav.logout")}>
+            <LogOut size={16} />
+            {!sidebarCollapsed && <span>{t("nav.logout")}</span>}
+          </button>
+          <button
+            className={styles.collapseBtn}
+            onClick={() => setSidebarCollapsed((p) => !p)}
+            aria-label={sidebarCollapsed ? "Expand sidebar" : "Collapse sidebar"}
+          >
+            {sidebarCollapsed ? <ChevronRight size={16} /> : <ChevronLeft size={16} />}
+          </button>
         </div>
-      </header>
-      <main className={styles.main}>{children}</main>
-      <footer className={styles.footer}>
-        <span className={styles.disclaimer}>{t("app.disclaimer")}</span>
-      </footer>
+      </nav>
+
+      <div className={styles.content}>
+        <main className={styles.main}><Outlet /></main>
+        <StatusBar />
+      </div>
+
+      <CommandPalette open={commandOpen} onOpenChange={setCommandOpen} />
+      <KeyboardShortcutsHelp open={shortcutsOpen} onClose={() => setShortcutsOpen(false)} />
+      <ToastContainer />
     </div>
   );
 }
diff --git a/frontend/src/components/common/StatusBar.tsx b/frontend/src/components/common/StatusBar.tsx
new file mode 100644
index 0000000..a3a4855
--- /dev/null
+++ b/frontend/src/components/common/StatusBar.tsx
@@ -0,0 +1,64 @@
+import { useEffect, useState } from "react";
+import { useTranslation } from "react-i18next";
+
+import { getHealthStatus } from "@/api/client";
+
+import styles from "./StatusBar.module.css";
+
+interface StatusBarProps {
+  nodeCount?: number;
+  edgeCount?: number;
+}
+
+export function StatusBar({ nodeCount, edgeCount }: StatusBarProps) {
+  const { t } = useTranslation();
+
+  const [isConnected, setIsConnected] = useState(true);
+
+  useEffect(() => {
+    let cancelled = false;
+
+    function poll() {
+      getHealthStatus()
+        .then(() => { if (!cancelled) setIsConnected(true); })
+        .catch(() => { if (!cancelled) setIsConnected(false); });
+    }
+
+    poll();
+    const interval = setInterval(poll, 30_000);
+    return () => { cancelled = true; clearInterval(interval); };
+  }, []);
+
+  return (
+    <div className={styles.statusBar}>
+      <div className={styles.left}>
+        <span
+          className={`${styles.dot} ${isConnected ? styles.connected : styles.disconnected}`}
+        />
+        <span>
+          {isConnected
+            ? t("statusBar.connected")
+            : t("statusBar.disconnected")}
+        </span>
+      </div>
+      <div className={styles.center}>
+        {nodeCount != null && (
+          <span className={styles.stat}>
+            {nodeCount.toLocaleString()} {t("statusBar.nodes")}
+          </span>
+        )}
+        {edgeCount != null && (
+          <span className={styles.stat}>
+            {edgeCount.toLocaleString()} {t("statusBar.edges")}
+          </span>
+        )}
+      </div>
+      <div className={styles.right}>
+        <span>
+          {t("statusBar.lastRefresh")}{" "}
+          {new Date().toLocaleTimeString()}
+        </span>
+      </div>
+    </div>
+  );
+}
diff --git a/frontend/src/components/graph/ControlsSidebar.module.css b/frontend/src/components/graph/ControlsSidebar.module.css
new file mode 100644
index 0000000..6f4dc13
--- /dev/null
+++ b/frontend/src/components/graph/ControlsSidebar.module.css
@@ -0,0 +1,132 @@
+.sidebar {
+  position: relative;
+  display: flex;
+  flex-direction: column;
+  width: 220px;
+  background: var(--bg-secondary);
+  border-right: 1px solid var(--border);
+  overflow-y: auto;
+  transition: width 0.2s;
+}
+
+.sidebar.collapsed {
+  width: 48px;
+}
+
+.toggle {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 100%;
+  height: 32px;
+  padding: 0;
+  background: transparent;
+  border: none;
+  border-bottom: 1px solid var(--border);
+  color: var(--text-secondary);
+  cursor: pointer;
+  transition: color 0.15s;
+}
+
+.toggle:hover {
+  color: var(--text-primary);
+}
+
+.icons {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: var(--space-md);
+  padding: var(--space-md) 0;
+}
+
+.sidebarIcon {
+  color: var(--text-muted);
+}
+
+.content {
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-md);
+  padding: var(--space-sm);
+}
+
+.section {
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-xs);
+}
+
+.sectionLabel {
+  font-size: var(--font-size-2xs);
+  color: var(--text-muted);
+  text-transform: uppercase;
+  letter-spacing: 0.05em;
+}
+
+.slider {
+  width: 100%;
+  accent-color: var(--accent);
+}
+
+.toggleList {
+  display: flex;
+  flex-direction: column;
+  gap: 1px;
+}
+
+.toggleItem {
+  display: flex;
+  align-items: center;
+  gap: var(--space-xs);
+  width: 100%;
+  padding: 3px var(--space-xs);
+  background: transparent;
+  border: none;
+  border-radius: var(--radius-sm);
+  color: var(--text-muted);
+  font-family: var(--font-sans);
+  font-size: var(--font-size-xs);
+  cursor: pointer;
+  text-align: left;
+  transition: all 0.1s;
+}
+
+.toggleItem:hover {
+  background: rgba(255, 255, 255, 0.02);
+  color: var(--text-secondary);
+}
+
+.toggleItem.enabled {
+  color: var(--text-primary);
+}
+
+.dot {
+  width: 8px;
+  height: 8px;
+  border-radius: 50%;
+  flex-shrink: 0;
+}
+
+.toggleLabel {
+  flex: 1;
+  min-width: 0;
+  overflow: visible;
+  white-space: nowrap;
+}
+
+.count {
+  font-family: var(--font-mono);
+  font-size: var(--font-size-2xs);
+  color: var(--text-muted);
+  min-width: 20px;
+  text-align: right;
+}
+
+.summary {
+  padding-top: var(--space-xs);
+  border-top: 1px solid var(--border);
+  font-size: var(--font-size-2xs);
+  color: var(--text-muted);
+  text-align: center;
+}
diff --git a/frontend/src/components/graph/ControlsSidebar.tsx b/frontend/src/components/graph/ControlsSidebar.tsx
new file mode 100644
index 0000000..8ed2a52
--- /dev/null
+++ b/frontend/src/components/graph/ControlsSidebar.tsx
@@ -0,0 +1,158 @@
+import { memo, useCallback } from "react";
+import { useTranslation } from "react-i18next";
+import { ChevronLeft, ChevronRight, Layers, GitFork, SlidersHorizontal } from "lucide-react";
+
+import { dataColors, type DataEntityType, relationshipColors } from "@/styles/tokens";
+
+import styles from "./ControlsSidebar.module.css";
+
+interface ControlsSidebarProps {
+  collapsed: boolean;
+  onToggle: () => void;
+  depth: number;
+  onDepthChange: (d: number) => void;
+  enabledTypes: Set<string>;
+  onToggleType: (t: string) => void;
+  enabledRelTypes: Set<string>;
+  onToggleRelType: (t: string) => void;
+  typeCounts: Record<string, number>;
+  relTypeCounts: Record<string, number>;
+}
+
+const ENTITY_TYPES = Object.keys(dataColors) as DataEntityType[];
+const REL_TYPES = Object.keys(relationshipColors);
+
+function ControlsSidebarInner({
+  collapsed,
+  onToggle,
+  depth,
+  onDepthChange,
+  enabledTypes,
+  onToggleType,
+  enabledRelTypes,
+  onToggleRelType,
+  typeCounts,
+  relTypeCounts,
+}: ControlsSidebarProps) {
+  const { t } = useTranslation();
+
+  const handleDepthChange = useCallback(
+    (e: React.ChangeEvent<HTMLInputElement>) => {
+      onDepthChange(Number(e.target.value));
+    },
+    [onDepthChange],
+  );
+
+  const visibleCount = Object.entries(typeCounts).reduce(
+    (sum, [type, count]) => (enabledTypes.has(type) ? sum + count : sum),
+    0,
+  );
+  const totalCount = Object.values(typeCounts).reduce((a, b) => a + b, 0);
+
+  return (
+    <div className={`${styles.sidebar} ${collapsed ? styles.collapsed : ""}`}>
+      <button className={styles.toggle} onClick={onToggle}>
+        {collapsed ? <ChevronRight size={16} /> : <ChevronLeft size={16} />}
+      </button>
+
+      {collapsed ? (
+        <div className={styles.icons}>
+          <span title={t("graph.depth")}><SlidersHorizontal size={16} className={styles.sidebarIcon} /></span>
+          <span title={t("graph.entityTypes")}><Layers size={16} className={styles.sidebarIcon} /></span>
+          <span title={t("graph.relationshipTypes")}><GitFork size={16} className={styles.sidebarIcon} /></span>
+        </div>
+      ) : (
+        <div className={styles.content}>
+          {/* Depth slider */}
+          <div className={styles.section}>
+            <label className={styles.sectionLabel}>
+              {t("graph.depth")}: {depth}
+            </label>
+            <input
+              type="range"
+              min={1}
+              max={4}
+              value={depth}
+              onChange={handleDepthChange}
+              className={styles.slider}
+            />
+          </div>
+
+          {/* Entity type toggles */}
+          <div className={styles.section}>
+            <label className={styles.sectionLabel}>
+              {t("graph.entityTypes")}
+            </label>
+            <div className={styles.toggleList}>
+              {ENTITY_TYPES.map((type) => {
+                const count = typeCounts[type] ?? 0;
+                const enabled = enabledTypes.has(type);
+                return (
+                  <button
+                    key={type}
+                    className={`${styles.toggleItem} ${enabled ? styles.enabled : ""}`}
+                    onClick={() => onToggleType(type)}
+                  >
+                    <span
+                      className={styles.dot}
+                      style={{
+                        backgroundColor: enabled
+                          ? dataColors[type]
+                          : "var(--text-muted)",
+                      }}
+                    />
+                    <span className={styles.toggleLabel}>
+                      {t(`entity.${type}`, type)}
+                    </span>
+                    <span className={styles.count}>{count}</span>
+                  </button>
+                );
+              })}
+            </div>
+          </div>
+
+          {/* Relationship type toggles */}
+          <div className={styles.section}>
+            <label className={styles.sectionLabel}>
+              {t("graph.relationshipTypes")}
+            </label>
+            <div className={styles.toggleList}>
+              {REL_TYPES.map((type) => {
+                const count = relTypeCounts[type] ?? 0;
+                const enabled = enabledRelTypes.has(type);
+                return (
+                  <button
+                    key={type}
+                    className={`${styles.toggleItem} ${enabled ? styles.enabled : ""}`}
+                    onClick={() => onToggleRelType(type)}
+                  >
+                    <span
+                      className={styles.dot}
+                      style={{
+                        backgroundColor: enabled
+                          ? (relationshipColors[type] ?? "var(--text-muted)")
+                          : "var(--text-muted)",
+                      }}
+                    />
+                    <span className={styles.toggleLabel}>{type}</span>
+                    <span className={styles.count}>{count}</span>
+                  </button>
+                );
+              })}
+            </div>
+          </div>
+
+          {/* Filter summary */}
+          <div className={styles.summary}>
+            {t("graph.filterSummary", {
+              visible: visibleCount,
+              total: totalCount,
+            })}
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}
+
+export const ControlsSidebar = memo(ControlsSidebarInner);
diff --git a/frontend/src/components/search/SearchResults.test.tsx b/frontend/src/components/search/SearchResults.test.tsx
index b149aa6..e2722ed 100644
--- a/frontend/src/components/search/SearchResults.test.tsx
+++ b/frontend/src/components/search/SearchResults.test.tsx
@@ -54,8 +54,8 @@ describe("SearchResults", () => {
   it("links to graph page for each result", () => {
     renderResults(sampleResults);
     const links = screen.getAllByRole("link");
-    expect(links[0]).toHaveAttribute("href", "/graph/e1");
-    expect(links[1]).toHaveAttribute("href", "/graph/e2");
+    expect(links[0]).toHaveAttribute("href", "/app/analysis/e1");
+    expect(links[1]).toHaveAttribute("href", "/app/analysis/e2");
   });
 
   it("shows source badges", () => {
diff --git a/frontend/src/components/search/SearchResults.tsx b/frontend/src/components/search/SearchResults.tsx
index 5cc5b83..5dbeabf 100644
--- a/frontend/src/components/search/SearchResults.tsx
+++ b/frontend/src/components/search/SearchResults.tsx
@@ -29,7 +29,7 @@ export function SearchResults({ results }: SearchResultsProps) {
         const color = entityColors[result.type as EntityType] ?? "var(--text-secondary)";
         return (
           <li key={result.id} className={styles.item}>
-            <Link to={`/graph/${result.id}`} className={styles.link}>
+            <Link to={`/app/analysis/${result.id}`} className={styles.link}>
               <span className={styles.typeBadge} style={{ borderColor: color, color }}>
                 {t(`entity.${result.type}`, result.type)}
               </span>
diff --git a/frontend/src/hooks/useKeyboardShortcuts.ts b/frontend/src/hooks/useKeyboardShortcuts.ts
new file mode 100644
index 0000000..c59b8ef
--- /dev/null
+++ b/frontend/src/hooks/useKeyboardShortcuts.ts
@@ -0,0 +1,48 @@
+import { useEffect } from "react";
+
+import { getActions } from "@/actions/registry";
+
+function matchShortcut(e: KeyboardEvent, shortcut: string): boolean {
+  const parts = shortcut.toLowerCase().split("+");
+  const needsMeta = parts.includes("cmd") || parts.includes("meta");
+  const needsCtrl = parts.includes("ctrl");
+  const needsShift = parts.includes("shift");
+  const needsAlt = parts.includes("alt");
+  const key = parts.filter(
+    (p) => !["cmd", "meta", "ctrl", "shift", "alt"].includes(p),
+  )[0];
+
+  if (needsMeta && !e.metaKey) return false;
+  if (needsCtrl && !e.ctrlKey) return false;
+  if (needsShift && !e.shiftKey) return false;
+  if (needsAlt && !e.altKey) return false;
+  if (!key) return false;
+  if (e.key.toLowerCase() !== key) return false;
+  return true;
+}
+
+export function useKeyboardShortcuts(): void {
+  useEffect(() => {
+    function handleKeyDown(e: KeyboardEvent) {
+      const tag = (e.target as HTMLElement).tagName;
+      const isInput = tag === "INPUT" || tag === "TEXTAREA" || tag === "SELECT";
+      const hasModifier = e.metaKey || e.ctrlKey;
+
+      // In input fields, only allow shortcuts with modifier keys (e.g. Cmd+K)
+      if (isInput && !hasModifier) return;
+
+      const actions = getActions();
+      for (const action of actions) {
+        if (!action.shortcut) continue;
+        if (matchShortcut(e, action.shortcut)) {
+          e.preventDefault();
+          action.handler();
+          return;
+        }
+      }
+    }
+
+    window.addEventListener("keydown", handleKeyDown);
+    return () => window.removeEventListener("keydown", handleKeyDown);
+  }, []);
+}
diff --git a/frontend/src/i18n.ts b/frontend/src/i18n.ts
index dc85507..8998cb8 100644
--- a/frontend/src/i18n.ts
+++ b/frontend/src/i18n.ts
@@ -6,15 +6,54 @@ const resources = {
     translation: {
       app: {
         title: "ICARUS",
-        subtitle: "Ferramenta de análise de dados públicos brasileiros",
+        subtitle: "Plataforma de inteligência em dados públicos brasileiros",
         disclaimer:
           "Dados de registros públicos. Não constitui acusação.",
       },
+      landing: {
+        hero: "Plataforma de inteligência em dados públicos brasileiros",
+        cta: "Acessar plataforma",
+        lastUpdated: "Dados atualizados em: {{date}}",
+        stats: {
+          entities: "entidades",
+          connections: "conexões",
+          dataSources: "fontes de dados",
+          indexes: "índices",
+        },
+        features: {
+          graph: "Análise de Grafo",
+          graphDesc: "Mapeie conexões entre 56M de entidades em registros públicos",
+          patterns: "Detecção de Padrões",
+          patternsDesc: "5 padrões automatizados de análise de dados",
+          investigations: "Área de Investigação",
+          investigationsDesc: "Análise colaborativa com anotações e etiquetas",
+        },
+        sources: {
+          title: "Fontes de Dados",
+          cnpj: "Cadastro de empresas da Receita Federal",
+          tse: "Doações eleitorais do TSE",
+          transparencia: "Contratos do Portal da Transparência",
+          sanctions: "Listas de sanções CEIS/CNEP",
+        },
+        footer: {
+          methodology: "Metodologia",
+          license: "AGPL-3.0",
+        },
+      },
       home: {
         tagline: "Mapeamento de conexões em dados públicos brasileiros",
         cta: "Iniciar busca",
       },
+      dashboard: {
+        welcome: "Painel",
+        quickSearch: "Busca rápida",
+        recentInvestigations: "Investigações recentes",
+        continueInvestigation: "Continuar",
+        noRecent: "Nenhuma investigação recente.",
+        quickStats: "Estatísticas",
+      },
       nav: {
+        dashboard: "Painel",
         search: "Buscar",
         graph: "Grafo",
         patterns: "Padrões",
@@ -22,12 +61,18 @@ const resources = {
         investigations: "Investigações",
         login: "Entrar",
         logout: "Sair",
+        register: "Registrar",
+        analysis: "Análise",
+        theme: "Tema",
+        themeLight: "Claro",
+        themeDark: "Escuro",
       },
       auth: {
         login: "Entrar",
         register: "Registrar",
         email: "E-mail",
         password: "Senha",
+        confirmPassword: "Confirmar senha",
         inviteCode: "Código de convite",
         switchToRegister: "Não tem conta? Registre-se",
         switchToLogin: "Já tem conta? Entre",
@@ -35,6 +80,9 @@ const resources = {
         registerError: "Erro ao registrar. Tente novamente.",
         invalidCredentials: "E-mail ou senha incorretos.",
         invalidInvite: "Código de convite inválido.",
+        loginTitle: "Acessar ICARUS",
+        registerTitle: "Criar conta",
+        loginSubtitle: "Plataforma de inteligência em dados públicos",
       },
       search: {
         placeholder: "CPF, CNPJ ou nome...",
@@ -44,6 +92,9 @@ const resources = {
         typeAll: "Todos",
         error: "Erro ao buscar. Tente novamente.",
         emptyHint: "Tente buscar por nome, CPF ou CNPJ",
+        recentSearches: "Buscas recentes",
+        clearRecent: "Limpar",
+        resultCount: "{{count}} resultados",
       },
       entity: {
         person: "Pessoa",
@@ -52,6 +103,7 @@ const resources = {
         finance: "Financeiro",
         sanction: "Sanção",
         election: "Eleição",
+        amendment: "Emenda",
         publicOffice: "Cargo Público",
         legal: "Jurídico",
         health: "Saúde",
@@ -65,7 +117,22 @@ const resources = {
       graph: {
         depth: "Profundidade",
         entityTypes: "Tipos de entidade",
+        relationshipTypes: "Tipos de conexão",
         noData: "Nenhum dado de grafo disponível.",
+        searchInGraph: "Buscar no grafo...",
+        layoutForce: "Força",
+        layoutHierarchy: "Hierarquia",
+        fullscreen: "Tela cheia",
+        exportPng: "Exportar PNG",
+        fitView: "Ajustar",
+        zoomIn: "Ampliar",
+        zoomOut: "Reduzir",
+        resetZoom: "Redefinir zoom",
+        filterSummary: "{{visible}} de {{total}} nós",
+        expand: "Expandir nó",
+        hide: "Ocultar nó",
+        viewDetail: "Ver detalhes",
+        addToInvestigation: "Adicionar à investigação",
         edge: {
           type: "Tipo de conexão",
           source: "Origem",
@@ -75,6 +142,10 @@ const resources = {
           sources: "Fontes",
           noValue: "Sem valor monetário",
         },
+        legend: {
+          title: "Legenda",
+        },
+        minimap: "Minimapa",
       },
       patterns: {
         title: "Padrões de Análise",
@@ -123,12 +194,99 @@ const resources = {
         noData: "Sem dados de comparação.",
         peers: "{{count}} pares",
       },
+      analysis: {
+        title: "Análise de Entidade",
+        graph: "Grafo",
+        connections: "Conexões",
+        timeline: "Linha do tempo",
+        export: "Exportar",
+        insights: "Análise",
+        detail: "Detalhes",
+        addToInvestigation: "Adicionar à investigação",
+        selectInvestigation: "Selecionar investigação",
+        createNew: "Criar nova",
+        addNote: "Adicionar nota",
+        noPatterns: "Nenhum padrão encontrado.",
+        noTimeline: "Nenhum evento no período.",
+        loadMore: "Carregar mais",
+        exposure: "Índice de exposição",
+        exposureDesc: "Métrica composta de conectividade e volume financeiro",
+        factor: {
+          connections: "Conexões",
+          sources: "Fontes cruzadas",
+          financial: "Volume financeiro",
+          patterns: "Padrões detectados",
+          baseline: "Desvio da linha base",
+        },
+        peerGroup: "Grupo de pares",
+        peers: "{{count}} pares",
+        percentile: "Percentil {{value}}",
+        exportPdf: "Relatório PDF",
+        exportCsv: "Planilha CSV",
+        exportJson: "Dados JSON",
+        exportScreenshot: "Captura de tela",
+        recentAnalyses: "Análises recentes",
+        patternScanner: "Busca por padrão",
+        noExposure: "Dados insuficientes para calcular exposição.",
+      },
+      command: {
+        placeholder: "Digite um comando...",
+        noResults: "Nenhum comando encontrado.",
+        navigation: "Navegação",
+        actions: "Ações",
+        goToDashboard: "Ir para o Painel",
+        goToSearch: "Ir para Busca",
+        goToPatterns: "Ir para Padrões",
+        goToInvestigations: "Ir para Investigações",
+        toggleFullscreen: "Alternar tela cheia",
+        toggleSidebar: "Alternar barra lateral",
+        showShortcuts: "Mostrar atalhos",
+      },
+      shortcuts: {
+        title: "Atalhos de Teclado",
+        navigation: "Navegação",
+        graph: "Grafo",
+        general: "Geral",
+        commandPalette: "Paleta de comandos",
+        search: "Buscar",
+        close: "Fechar",
+      },
+      statusBar: {
+        connected: "Conectado",
+        disconnected: "Desconectado",
+        nodes: "nós",
+        edges: "arestas",
+        lastRefresh: "Atualizado",
+      },
+      toast: {
+        copied: "Copiado!",
+        saved: "Salvo!",
+        deleted: "Excluído!",
+        error: "Erro ao executar ação.",
+      },
+      mobile: {
+        title: "ICARUS",
+        message: "Esta plataforma requer resolução mínima de 1024px para análise de grafos.",
+        hint: "Acesse em um computador para a experiência completa.",
+      },
       common: {
         source: "Fonte",
         confidence: "Confiança",
         connections: "conexões",
         sources: "fontes",
         loading: "Carregando...",
+        cancel: "Cancelar",
+        confirm: "Confirmar",
+        close: "Fechar",
+        save: "Salvar",
+        delete: "Excluir",
+        edit: "Editar",
+        back: "Voltar",
+      },
+      error: {
+        title: "ICARUS",
+        message: "Algo deu errado. Recarregue a página.",
+        reload: "Recarregar",
       },
     },
   },
@@ -136,15 +294,54 @@ const resources = {
     translation: {
       app: {
         title: "ICARUS",
-        subtitle: "Brazilian public data analysis tool",
+        subtitle: "Brazilian public data intelligence platform",
         disclaimer:
           "Data patterns from public records. Not accusations.",
       },
+      landing: {
+        hero: "Brazilian public data intelligence platform",
+        cta: "Access platform",
+        lastUpdated: "Data updated: {{date}}",
+        stats: {
+          entities: "entities",
+          connections: "connections",
+          dataSources: "data sources",
+          indexes: "indexes",
+        },
+        features: {
+          graph: "Graph Analysis",
+          graphDesc: "Map connections across 56M entities in public records",
+          patterns: "Pattern Detection",
+          patternsDesc: "5 automated data analysis patterns",
+          investigations: "Investigation Workspace",
+          investigationsDesc: "Collaborative analysis with annotations and tags",
+        },
+        sources: {
+          title: "Data Sources",
+          cnpj: "Federal Revenue company registry",
+          tse: "Electoral Court donation records",
+          transparencia: "Government transparency portal contracts",
+          sanctions: "CEIS/CNEP sanctions lists",
+        },
+        footer: {
+          methodology: "Methodology",
+          license: "AGPL-3.0",
+        },
+      },
       home: {
         tagline: "Mapping connections in Brazilian public data",
         cta: "Start searching",
       },
+      dashboard: {
+        welcome: "Dashboard",
+        quickSearch: "Quick search",
+        recentInvestigations: "Recent investigations",
+        continueInvestigation: "Continue",
+        noRecent: "No recent investigations.",
+        quickStats: "Statistics",
+      },
       nav: {
+        dashboard: "Dashboard",
         search: "Search",
         graph: "Graph",
         patterns: "Patterns",
@@ -152,12 +349,18 @@ const resources = {
         investigations: "Investigations",
         login: "Login",
         logout: "Logout",
+        register: "Register",
+        analysis: "Analysis",
+        theme: "Theme",
+        themeLight: "Light",
+        themeDark: "Dark",
       },
       auth: {
         login: "Login",
         register: "Register",
         email: "Email",
         password: "Password",
+        confirmPassword: "Confirm password",
         inviteCode: "Invite code",
         switchToRegister: "No account? Register",
         switchToLogin: "Have an account? Login",
@@ -165,6 +368,9 @@ const resources = {
         registerError: "Registration failed. Please try again.",
         invalidCredentials: "Invalid email or password.",
         invalidInvite: "Invalid invite code.",
+        loginTitle: "Access ICARUS",
+        registerTitle: "Create account",
+        loginSubtitle: "Public data intelligence platform",
       },
       search: {
         placeholder: "CPF, CNPJ, or name...",
@@ -174,6 +380,9 @@ const resources = {
         typeAll: "All",
         error: "Search failed. Please try again.",
         emptyHint: "Try searching by name, CPF, or CNPJ",
+        recentSearches: "Recent searches",
+        clearRecent: "Clear",
+        resultCount: "{{count}} results",
       },
       entity: {
         person: "Person",
@@ -182,6 +391,7 @@ const resources = {
         finance: "Finance",
         sanction: "Sanction",
         election: "Election",
+        amendment: "Amendment",
         publicOffice: "Public Office",
         legal: "Legal",
         health: "Health",
@@ -195,7 +405,22 @@ const resources = {
       graph: {
         depth: "Depth",
         entityTypes: "Entity types",
+        relationshipTypes: "Relationship types",
         noData: "No graph data available.",
+        searchInGraph: "Search in graph...",
+        layoutForce: "Force",
+        layoutHierarchy: "Hierarchy",
+        fullscreen: "Fullscreen",
+        exportPng: "Export PNG",
+        fitView: "Fit view",
+        zoomIn: "Zoom in",
+        zoomOut: "Zoom out",
+        resetZoom: "Reset zoom",
+        filterSummary: "{{visible}} of {{total}} nodes",
+        expand: "Expand node",
+        hide: "Hide node",
+        viewDetail: "View detail",
+        addToInvestigation: "Add to investigation",
         edge: {
           type: "Connection Type",
           source: "Source",
@@ -205,6 +430,10 @@ const resources = {
           sources: "Sources",
           noValue: "No monetary value",
         },
+        legend: {
+          title: "Legend",
+        },
+        minimap: "Minimap",
       },
       patterns: {
         title: "Analysis Patterns",
@@ -253,12 +482,99 @@ const resources = {
         noData: "No comparison data.",
         peers: "{{count}} peers",
       },
+      analysis: {
+        title: "Entity Analysis",
+        graph: "Graph",
+        connections: "Connections",
+        timeline: "Timeline",
+        export: "Export",
+        insights: "Insights",
+        detail: "Detail",
+        addToInvestigation: "Add to investigation",
+        selectInvestigation: "Select investigation",
+        createNew: "Create new",
+        addNote: "Add note",
+        noPatterns: "No patterns found.",
+        noTimeline: "No events in this period.",
+        loadMore: "Load more",
+        exposure: "Exposure index",
+        exposureDesc: "Composite metric of connectivity and financial volume",
+        factor: {
+          connections: "Connections",
+          sources: "Cross-source",
+          financial: "Financial volume",
+          patterns: "Patterns detected",
+          baseline: "Baseline deviation",
+        },
+        peerGroup: "Peer group",
+        peers: "{{count}} peers",
+        percentile: "Percentile {{value}}",
+        exportPdf: "PDF Report",
+        exportCsv: "CSV Spreadsheet",
+        exportJson: "JSON Data",
+        exportScreenshot: "Screenshot",
+        recentAnalyses: "Recent analyses",
+        patternScanner: "Pattern search",
+        noExposure: "Insufficient data to calculate exposure.",
+      },
+      command: {
+        placeholder: "Type a command...",
+        noResults: "No commands found.",
+        navigation: "Navigation",
+        actions: "Actions",
+        goToDashboard: "Go to Dashboard",
+        goToSearch: "Go to Search",
+        goToPatterns: "Go to Patterns",
+        goToInvestigations: "Go to Investigations",
+        toggleFullscreen: "Toggle fullscreen",
+        toggleSidebar: "Toggle sidebar",
+        showShortcuts: "Show shortcuts",
+      },
+      shortcuts: {
+        title: "Keyboard Shortcuts",
+        navigation: "Navigation",
+        graph: "Graph",
+        general: "General",
+        commandPalette: "Command palette",
+        search: "Search",
+        close: "Close",
+      },
+      statusBar: {
+        connected: "Connected",
+        disconnected: "Disconnected",
+        nodes: "nodes",
+        edges: "edges",
+        lastRefresh: "Updated",
+      },
+      toast: {
+        copied: "Copied!",
+        saved: "Saved!",
+        deleted: "Deleted!",
+        error: "Action failed.",
+      },
+      mobile: {
+        title: "ICARUS",
+        message: "This platform requires a minimum resolution of 1024px for graph analysis.",
+        hint: "Access from a computer for the full experience.",
+      },
       common: {
         source: "Source",
         confidence: "Confidence",
         connections: "connections",
         sources: "sources",
         loading: "Loading...",
+        cancel: "Cancel",
+        confirm: "Confirm",
+        close: "Close",
+        save: "Save",
+        delete: "Delete",
+        edit: "Edit",
+        back: "Back",
+      },
+      error: {
+        title: "ICARUS",
+        message: "Something went wrong. Please reload the page.",
+        reload: "Reload",
       },
     },
   },
diff --git a/frontend/src/pages/Dashboard.tsx b/frontend/src/pages/Dashboard.tsx
new file mode 100644
index 0000000..45ecb62
--- /dev/null
+++ b/frontend/src/pages/Dashboard.tsx
@@ -0,0 +1,111 @@
+import { useEffect, useState } from "react";
+import { useTranslation } from "react-i18next";
+import { Link, useNavigate } from "react-router";
+
+import { type Investigation, listInvestigations, searchEntities, type SearchResult } from "@/api/client";
+import { Skeleton } from "@/components/common/Skeleton";
+import { useToastStore } from "@/stores/toast";
+
+import styles from "./Dashboard.module.css";
+
+export function Dashboard() {
+  const { t } = useTranslation();
+  const navigate = useNavigate();
+  const addToast = useToastStore((s) => s.addToast);
+
+  const [recentInvestigations, setRecentInvestigations] = useState<Investigation[]>([]);
+  const [loadingInvestigations, setLoadingInvestigations] = useState(true);
+  const [searchQuery, setSearchQuery] = useState("");
+  const [searchResults, setSearchResults] = useState<SearchResult[]>([]);
+  const [searching, setSearching] = useState(false);
+
+  useEffect(() => {
+    listInvestigations(1, 3)
+      .then((res) => setRecentInvestigations(res.investigations))
+      .catch(() => {})
+      .finally(() => setLoadingInvestigations(false));
+  }, []);
+
+  const handleSearch = async (e: React.FormEvent) => {
+    e.preventDefault();
+    const q = searchQuery.trim();
+    if (!q) return;
+    setSearching(true);
+    try {
+      const res = await searchEntities(q, undefined, 1, 5);
+      setSearchResults(res.results);
+    } catch {
+      setSearchResults([]);
+      addToast("error", t("search.error"));
+    } finally {
+      setSearching(false);
+    }
+  };
+
+  return (
+    <div className={styles.page}>
+      <h1 className={styles.title}>{t("dashboard.welcome")}</h1>
+
+      <section className={styles.searchSection}>
+        <h2 className={styles.sectionTitle}>{t("dashboard.quickSearch")}</h2>
+        <form className={styles.searchForm} onSubmit={handleSearch}>
+          <input
+            type="text"
+            className={styles.searchInput}
+            value={searchQuery}
+            onChange={(e) => setSearchQuery(e.target.value)}
+            placeholder={t("search.placeholder")}
+          />
+          <button type="submit" className={styles.searchBtn} disabled={searching}>
+            {t("search.button")}
+          </button>
+        </form>
+        {searchResults.length > 0 && (
+          <ul className={styles.quickResults}>
+            {searchResults.map((r) => (
+              <li key={r.id}>
+                <Link to={`/app/analysis/${r.id}`} className={styles.quickResultLink}>
+                  <span className={styles.quickResultType}>
+                    {t(`entity.${r.type}`, r.type)}
+                  </span>
+                  <span className={styles.quickResultName}>{r.name}</span>
+                  {r.document && (
+                    <span className={styles.quickResultDoc}>{r.document}</span>
+                  )}
+                </Link>
+              </li>
+            ))}
+          </ul>
+        )}
+      </section>
+
+      <section className={styles.investigationsSection}>
+        <h2 className={styles.sectionTitle}>{t("dashboard.recentInvestigations")}</h2>
+        {loadingInvestigations ? (
+          <div className={styles.skeletons}>
+            <Skeleton variant="rect" height="72px" />
+            <Skeleton variant="rect" height="72px" />
+            <Skeleton variant="rect" height="72px" />
+          </div>
+        ) : recentInvestigations.length === 0 ? (
+          <p className={styles.empty}>{t("dashboard.noRecent")}</p>
+        ) : (
+          <div className={styles.investigationCards}>
+            {recentInvestigations.map((inv) => (
+              <button
+                key={inv.id}
+                className={styles.investigationCard}
+                onClick={() => navigate(`/app/investigations/${inv.id}`)}
+              >
+                <span className={styles.invTitle}>{inv.title}</span>
+                <span className={styles.invMeta}>
+                  {inv.entity_ids.length} {t("common.connections")} &middot; {new Date(inv.updated_at).toLocaleDateString()}
+                </span>
+              </button>
+            ))}
+          </div>
+        )}
+      </section>
+    </div>
+  );
+}
diff --git a/frontend/src/pages/EntityAnalysis.tsx b/frontend/src/pages/EntityAnalysis.tsx
new file mode 100644
index 0000000..f4537cc
--- /dev/null
+++ b/frontend/src/pages/EntityAnalysis.tsx
@@ -0,0 +1,14 @@
+import { useTranslation } from "react-i18next";
+import { useParams } from "react-router";
+
+export function EntityAnalysis() {
+  const { t } = useTranslation();
+  const { entityId } = useParams<{ entityId: string }>();
+
+  return (
+    <div>
+      <h1>{t("analysis.title")}</h1>
+      <p>{entityId}</p>
+    </div>
+  );
+}
diff --git a/frontend/src/pages/Patterns.tsx b/frontend/src/pages/Patterns.tsx
index 30cb85b..f76776b 100644
--- a/frontend/src/pages/Patterns.tsx
+++ b/frontend/src/pages/Patterns.tsx
@@ -47,7 +47,7 @@ export function Patterns() {
 
   const handleEntityClick = useCallback(
     (id: string) => {
-      navigate(`/graph/${encodeURIComponent(id)}`);
+      navigate(`/app/analysis/${encodeURIComponent(id)}`);
     },
     [navigate],
   );
diff --git a/frontend/src/styles/global.css b/frontend/src/styles/global.css
index 2bdc71c..9af9113 100644
--- a/frontend/src/styles/global.css
+++ b/frontend/src/styles/global.css
@@ -1,64 +1,185 @@
+/* === IBM Plex Sans — UI chrome === */
+@font-face {
+  font-family: "IBM Plex Sans";
+  font-style: normal;
+  font-weight: 400;
+  font-display: swap;
+  src: url("/fonts/IBMPlexSans-Regular.woff2") format("woff2");
+}
+@font-face {
+  font-family: "IBM Plex Sans";
+  font-style: normal;
+  font-weight: 500;
+  font-display: swap;
+  src: url("/fonts/IBMPlexSans-Medium.woff2") format("woff2");
+}
+@font-face {
+  font-family: "IBM Plex Sans";
+  font-style: normal;
+  font-weight: 600;
+  font-display: swap;
+  src: url("/fonts/IBMPlexSans-SemiBold.woff2") format("woff2");
+}
+@font-face {
+  font-family: "IBM Plex Sans";
+  font-style: normal;
+  font-weight: 700;
+  font-display: swap;
+  src: url("/fonts/IBMPlexSans-Bold.woff2") format("woff2");
+}
+
+/* === IBM Plex Mono — data display === */
+@font-face {
+  font-family: "IBM Plex Mono";
+  font-style: normal;
+  font-weight: 400;
+  font-display: swap;
+  src: url("/fonts/IBMPlexMono-Regular.woff2") format("woff2");
+}
+@font-face {
+  font-family: "IBM Plex Mono";
+  font-style: normal;
+  font-weight: 500;
+  font-display: swap;
+  src: url("/fonts/IBMPlexMono-Medium.woff2") format("woff2");
+}
+@font-face {
+  font-family: "IBM Plex Mono";
+  font-style: normal;
+  font-weight: 600;
+  font-display: swap;
+  src: url("/fonts/IBMPlexMono-SemiBold.woff2") format("woff2");
+}
+@font-face {
+  font-family: "IBM Plex Mono";
+  font-style: normal;
+  font-weight: 700;
+  font-display: swap;
+  src: url("/fonts/IBMPlexMono-Bold.woff2") format("woff2");
+}
+
 :root {
-  /* Background */
-  --bg-primary: #0d100e;
-  --bg-secondary: #141a16;
-  --bg-tertiary: #1a211c;
+  /* === Backgrounds — deep black-green, night-vision base === */
+  --bg-primary: #060a07;
+  --bg-secondary: #0c1210;
+  --bg-tertiary: #111a16;
+  --bg-elevated: #162018;
+  --bg-surface: #1a2820;
+  --bg-overlay: rgba(0, 0, 0, 0.75);
 
-  /* Text */
-  --text-primary: #e0e0e0;
-  --text-secondary: #8a8a8a;
-  --text-muted: #555;
+  /* === Text — high contrast for data readability === */
+  --text-primary: #e8ede9;
+  --text-secondary: #94a39a;
+  --text-muted: #5a6b60;
 
-  /* Accent */
-  --accent: #e07a2f;
-  --accent-hover: #f08a3f;
+  /* === Accent — amber/gold (WCAG AA: 5.8:1 on bg-primary) === */
+  --accent: #ff9a3c;
+  --accent-hover: #ffb060;
+  --accent-dim: rgba(255, 154, 60, 0.15);
 
-  /* Border */
+  /* === System — cyan === */
+  --cyan: #00e5c3;
+  --cyan-dim: rgba(0, 229, 195, 0.1);
+  --cyan-glow: 0 0 12px rgba(0, 229, 195, 0.3);
+
+  /* === Semantic === */
+  --color-success: #22c55e;
+  --color-warning: #eab308;
+  --color-danger: #ef4444;
+  --color-info: #3b82f6;
+
+  /* === Data categorical — 6 colorblind-safe graph colors === */
+  --data-person: #4ea8de;
+  --data-company: #e07a5f;
+  --data-election: #81b29a;
+  --data-contract: #f2cc8f;
+  --data-sanction: #e56b6f;
+  --data-amendment: #b8a9c9;
+
+  /* === Borders === */
   --border: rgba(255, 255, 255, 0.04);
-  --border-hover: rgba(255, 255, 255, 0.1);
+  --border-subtle: rgba(255, 255, 255, 0.02);
+  --border-hover: rgba(255, 255, 255, 0.08);
+  --border-active: rgba(0, 229, 195, 0.2);
 
-  /* Entity type colors */
-  --color-person: #e07a2f;
-  --color-company: #dd6b20;
-  --color-contract: #38a169;
-  --color-finance: #3b82f6;
-  --color-sanction: #dc2626;
-  --color-legal: #ca8a04;
-  --color-health: #ec4899;
-  --color-environment: #0d9488;
-  --color-labor: #64748b;
-  --color-education: #a855f7;
-  --color-regulatory: #2dd4bf;
-  --color-property: #8b5cf6;
+  /* === Shadows === */
+  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
+  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
+  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
+  --shadow-glow: 0 0 20px rgba(255, 154, 60, 0.1);
 
-  /* Spacing */
+  /* === Spacing === */
+  --space-2xs: 2px;
   --space-xs: 4px;
   --space-sm: 8px;
   --space-md: 16px;
   --space-lg: 24px;
   --space-xl: 32px;
+  --space-2xl: 48px;
+  --space-3xl: 64px;
+  --space-4xl: 96px;
 
-  /* Typography */
-  --font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", monospace;
+  /* === Typography === */
+  --font-sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, sans-serif;
+  --font-mono: "IBM Plex Mono", "Menlo", "Consolas", monospace;
+  --font-size-2xs: 0.625rem;
   --font-size-xs: 0.75rem;
   --font-size-sm: 0.875rem;
   --font-size-md: 1rem;
   --font-size-lg: 1.25rem;
   --font-size-xl: 1.5rem;
+  --font-size-2xl: 2rem;
+  --font-size-3xl: 3rem;
+  --font-size-4xl: 4rem;
 
-  /* Radius */
-  --radius-sm: 4px;
-  --radius-md: 8px;
+  /* === Radius — intelligence aesthetic: 2-4px max === */
+  --radius-sm: 2px;
+  --radius-md: 4px;
 
-  /* Transitions */
-  --transition-fast: 150ms ease;
-  --transition-normal: 250ms ease;
+  /* === Transitions === */
+  --transition-fast: 150ms ease-out;
+  --transition-normal: 250ms ease-out;
 
-  /* Focus */
+  /* === Focus === */
   --focus-ring: 0 0 0 2px var(--accent);
 
-  /* Hover */
+  /* === Hover === */
   --bg-hover: rgba(255, 255, 255, 0.03);
+
+  /* === Z-index scale === */
+  --z-dropdown: 100;
+  --z-sticky: 200;
+  --z-overlay: 300;
+  --z-modal: 400;
+  --z-toast: 500;
+  --z-command: 600;
+}
+
+[data-theme="light"] {
+  --bg-primary: #f5f7f6;
+  --bg-secondary: #edf0ee;
+  --bg-tertiary: #e4e8e5;
+  --bg-elevated: #ffffff;
+  --bg-surface: #ffffff;
+  --bg-overlay: rgba(0, 0, 0, 0.3);
+  --text-primary: #1a2820;
+  --text-secondary: #4a5c52;
+  --text-muted: #7a8c82;
+  --accent: #d97706;
+  --accent-hover: #b45309;
+  --accent-dim: rgba(217, 119, 6, 0.1);
+  --cyan: #0891b2;
+  --cyan-dim: rgba(8, 145, 178, 0.08);
+  --cyan-glow: 0 0 12px rgba(8, 145, 178, 0.15);
+  --border: rgba(0, 0, 0, 0.08);
+  --border-subtle: rgba(0, 0, 0, 0.04);
+  --border-hover: rgba(0, 0, 0, 0.12);
+  --border-active: rgba(8, 145, 178, 0.2);
+  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
+  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
+  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.15);
+  --shadow-glow: 0 0 20px rgba(217, 119, 6, 0.05);
+  --bg-hover: rgba(0, 0, 0, 0.04);
 }
 
 * {
@@ -67,12 +188,27 @@
   padding: 0;
 }
 
+html {
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+  text-rendering: optimizeLegibility;
+}
+
 body {
   background: var(--bg-primary);
   color: var(--text-primary);
-  font-family: var(--font-mono);
+  font-family: var(--font-sans);
   font-size: var(--font-size-sm);
-  line-height: 1.6;
+  line-height: 1.5;
+}
+
+code,
+pre,
+kbd,
+.mono {
+  font-family: var(--font-mono);
+  font-feature-settings: "tnum" 1, "zero" 1;
+  font-variant-numeric: tabular-nums slashed-zero;
 }
 
 a {
@@ -97,3 +233,22 @@ textarea:focus-visible {
   outline: none;
   box-shadow: var(--focus-ring);
 }
+
+input,
+textarea,
+select {
+  font-family: inherit;
+  font-size: inherit;
+}
+
+/* === Reduced motion === */
+@media (prefers-reduced-motion: reduce) {
+  *,
+  *::before,
+  *::after {
+    animation-duration: 0.01ms !important;
+    animation-iteration-count: 1 !important;
+    transition-duration: 0.01ms !important;
+    scroll-behavior: auto !important;
+  }
+}
