feat: add workspace account page and mobile app shell

Normalize the UI with shared primitives, add a workspace-backed account surface, and improve authenticated mobile navigation, map behavior, and dashboard browsing.

shared/types.ts

@@ -13,6 +13,48 @@ export interface SessionUser extends AppUser {
   sessionId: string;
 }
 
+export type WorkspaceType = 'personal' | 'company';
+export type WorkspaceRole = 'owner' | 'admin' | 'member';
+
+export interface AccountWorkspace {
+  id: string;
+  name: string;
+  workspaceType: WorkspaceType;
+  role: WorkspaceRole;
+  memberCount: number;
+}
+
+export interface AccountSummary {
+  totalSearchJobs: number;
+  totalDeepResearchBatches: number;
+  totalBusinesses: number;
+}
+
+export interface AccountBillingPlaceholder {
+  status: 'not_configured';
+  planName: string | null;
+  message: string;
+}
+
+export interface AccountTeamPlaceholder {
+  canManageMembers: boolean;
+  message: string;
+}
+
+export interface AccountPageData {
+  profile: AppUser;
+  workspace: AccountWorkspace;
+  summary: AccountSummary;
+  billing: AccountBillingPlaceholder;
+  team: AccountTeamPlaceholder;
+}
+
+export interface UpdateAccountProfileRequest {
+  displayName?: string;
+  avatarUrl?: string | null;
+  workspaceName?: string;
+}
+
 export interface GeoJsonGeometry {
   type: 'Polygon' | 'MultiPolygon';
   coordinates: unknown;