fix: update tool count to 51, refresh hero copy and login page

- Update stale tool counts (48/49/50) to 51 across all apps, docs, and tests
- Add Meme Generator to landing page bento grid (was missing)
- Add 12 SEO-friendly rotating phrases to hero typing cursor
- Change landing hero subtitle to "Every image tool you need."
- Replace outdated login page copy with branded hero + rotating phrases

tests/unit/landing/components.test.tsx

@@ -41,9 +41,7 @@ describe("Hero", () => {
 
   it("renders the subheadline", () => {
     render(<Hero />);
-    expect(
-      screen.getByText("The open-source, self-hosted image processing platform."),
-    ).toBeDefined();
+    expect(screen.getByText("Every image tool you need.")).toBeDefined();
   });
 
   it("renders the CTA button linking to GitHub", () => {
@@ -159,7 +157,7 @@ describe("Pricing", () => {
 
   it("renders free plan features", () => {
     render(<Pricing />);
-    expect(screen.getByText("All 48 image processing tools")).toBeDefined();
+    expect(screen.getByText("All 51 image processing tools")).toBeDefined();
     expect(screen.getByText("Unlimited usage, no hidden caps")).toBeDefined();
     expect(screen.getByText("15 local AI models included")).toBeDefined();
     expect(screen.getByText("AGPL-3.0 licensed")).toBeDefined();