feat(FN-692): remove 'tasks' text from dashboard header

- Remove 'tasks' label from Header component
- Remove unused CSS styles related to the header text
- Update Header test to reflect the simplified header

packages/dashboard/app/components/Header.test.tsx

@@ -38,7 +38,6 @@ describe("Header", () => {
   it("renders the logo and brand", () => {
     renderHeader();
     expect(screen.getByText("Fusion")).toBeDefined();
-    expect(screen.getByText("tasks")).toBeDefined();
   });
 
   it("renders action buttons", () => {
@@ -517,8 +516,7 @@ describe("Header", () => {
 
     it("hides logo-sub on mobile via CSS", () => {
       renderHeader({}, true);
-      // The element exists but is hidden via CSS on mobile
-      expect(screen.getByText("tasks")).toBeDefined();
+      // The "tasks" element no longer exists - it was removed
     });
   });
 });

packages/dashboard/app/components/Header.tsx

@@ -170,7 +170,6 @@ export function Header({
       <div className="header-left">
         <img src="/logo.svg" alt="Fusion logo" className="header-logo" width={24} height={24} />
         <h1 className="logo">Fusion</h1>
-        <span className="logo-sub">tasks</span>
 
         {/* Project Selector - shown when 2+ projects, placed next to logo/title */}
         {projects.length > 1 && (

packages/dashboard/app/styles.css

@@ -457,12 +457,6 @@ body {
   font-weight: 700;
   letter-spacing: -0.5px;
 }
-.logo-sub {
-  font-size: 13px;
-  color: var(--text-muted);
-  font-weight: 400;
-}
-
 /* === Buttons === */
 .btn {
   padding: var(--btn-padding);