feat: add /pricing and /changelog SEO pages

- Pricing page with full comparison table, feature matrix, FAQ, JSON-LD Product schema
- Changelog page with all versions v0.1.0-v0.6.0, JSON-LD Blog schema
- 301 redirects for clean URLs
- Added to sitemap.xml
- Pricing in main nav, changelog in footer
- 14 new tests (171 total)

src/index.ts

@@ -138,6 +138,8 @@ for (const page of ["social-media-previews", "website-monitoring", "pdf-reports"
 // Clean URLs for SEO pages
 app.get("/compare", (_req, res) => res.redirect(301, "/compare.html"));
 app.get("/guides/quick-start", (_req, res) => res.redirect(301, "/guides/quick-start.html"));
+app.get("/pricing", (_req, res) => res.redirect(301, "/pricing.html"));
+app.get("/changelog", (_req, res) => res.redirect(301, "/changelog.html"));
 
 // Static files (landing page)
 app.use(express.static(path.join(__dirname, "../public"), { etag: true }));

src/routes/__tests__/seo-pages.test.ts

@@ -14,6 +14,8 @@ function createApp() {
   // Clean URL redirects matching index.ts
   app.get('/compare', (_req, res) => res.redirect(301, '/compare.html'))
   app.get('/guides/quick-start', (_req, res) => res.redirect(301, '/guides/quick-start.html'))
+  app.get('/pricing', (_req, res) => res.redirect(301, '/pricing.html'))
+  app.get('/changelog', (_req, res) => res.redirect(301, '/changelog.html'))
 
   app.use(express.static(publicDir, { etag: true }))
   return app
@@ -92,16 +94,146 @@ describe('Quick-Start Guide', () => {
   })
 })
 
+describe('Pricing Page', () => {
+  const app = createApp()
+
+  it('GET /pricing.html returns 200', async () => {
+    const res = await request(app).get('/pricing.html')
+    expect(res.status).toBe(200)
+    expect(res.headers['content-type']).toContain('text/html')
+  })
+
+  it('GET /pricing redirects 301 to .html', async () => {
+    const res = await request(app).get('/pricing')
+    expect(res.status).toBe(301)
+    expect(res.headers.location).toBe('/pricing.html')
+  })
+
+  it('contains required SEO elements', async () => {
+    const res = await request(app).get('/pricing.html')
+    const html = res.text
+    expect(html).toMatch(/<title>.+<\/title>/)
+    expect(html).toMatch(/<meta name="description" content=".+"/)
+    expect(html).toMatch(/<meta property="og:title"/)
+    expect(html).toMatch(/<meta property="og:description"/)
+    expect(html).toMatch(/<meta property="og:type" content="website"/)
+    expect(html).toMatch(/<link rel="canonical" href="https:\/\/snapapi\.eu\/pricing"/)
+    expect(html).toMatch(/<meta name="twitter:card"/)
+  })
+
+  it('contains JSON-LD Product schema with offers', async () => {
+    const res = await request(app).get('/pricing.html')
+    const html = res.text
+    expect(html).toContain('"@type":"Product"')
+    expect(html).toContain('"Offer"')
+    expect(html).toContain('"9.00"')
+    expect(html).toContain('"29.00"')
+    expect(html).toContain('"79.00"')
+  })
+
+  it('contains all three pricing tiers', async () => {
+    const res = await request(app).get('/pricing.html')
+    const html = res.text
+    expect(html).toContain('Starter')
+    expect(html).toContain('Pro')
+    expect(html).toContain('Business')
+    expect(html).toContain('€9')
+    expect(html).toContain('€29')
+    expect(html).toContain('€79')
+  })
+
+  it('contains feature comparison matrix', async () => {
+    const res = await request(app).get('/pricing.html')
+    const html = res.text
+    expect(html).toContain('PNG')
+    expect(html).toContain('Full-page')
+    expect(html).toContain('Custom viewport')
+  })
+
+  it('contains FAQ section', async () => {
+    const res = await request(app).get('/pricing.html')
+    const html = res.text
+    expect(html).toContain('FAQ')
+    expect(html).toContain('billing')
+  })
+
+  it('contains checkout CTA buttons', async () => {
+    const res = await request(app).get('/pricing.html')
+    const html = res.text
+    expect(html).toContain("checkout('starter')")
+    expect(html).toContain("checkout('pro')")
+    expect(html).toContain("checkout('business')")
+  })
+})
+
+describe('Changelog Page', () => {
+  const app = createApp()
+
+  it('GET /changelog.html returns 200', async () => {
+    const res = await request(app).get('/changelog.html')
+    expect(res.status).toBe(200)
+    expect(res.headers['content-type']).toContain('text/html')
+  })
+
+  it('GET /changelog redirects 301 to .html', async () => {
+    const res = await request(app).get('/changelog')
+    expect(res.status).toBe(301)
+    expect(res.headers.location).toBe('/changelog.html')
+  })
+
+  it('contains required SEO elements', async () => {
+    const res = await request(app).get('/changelog.html')
+    const html = res.text
+    expect(html).toMatch(/<title>.+<\/title>/)
+    expect(html).toMatch(/<meta name="description" content=".+"/)
+    expect(html).toMatch(/<meta property="og:title"/)
+    expect(html).toMatch(/<meta property="og:description"/)
+    expect(html).toMatch(/<link rel="canonical" href="https:\/\/snapapi\.eu\/changelog"/)
+    expect(html).toMatch(/<meta name="twitter:card"/)
+  })
+
+  it('contains JSON-LD Blog schema', async () => {
+    const res = await request(app).get('/changelog.html')
+    const html = res.text
+    expect(html).toContain('"@type":"Blog"')
+  })
+
+  it('contains all version entries in order', async () => {
+    const res = await request(app).get('/changelog.html')
+    const html = res.text
+    const v06 = html.indexOf('v0.6.0')
+    const v05 = html.indexOf('v0.5.0')
+    const v04 = html.indexOf('v0.4.0')
+    const v03 = html.indexOf('v0.3.0')
+    const v02 = html.indexOf('v0.2.0')
+    const v01 = html.indexOf('v0.1.0')
+    expect(v06).toBeGreaterThan(-1)
+    expect(v05).toBeGreaterThan(v06)
+    expect(v04).toBeGreaterThan(v05)
+    expect(v03).toBeGreaterThan(v04)
+    expect(v02).toBeGreaterThan(v03)
+    expect(v01).toBeGreaterThan(v02)
+  })
+})
+
 describe('Sitemap & Index updates', () => {
   it('sitemap contains new URLs', () => {
     const sitemap = fs.readFileSync(path.join(publicDir, 'sitemap.xml'), 'utf-8')
     expect(sitemap).toContain('https://snapapi.eu/compare')
     expect(sitemap).toContain('https://snapapi.eu/guides/quick-start')
+    expect(sitemap).toContain('https://snapapi.eu/pricing')
+    expect(sitemap).toContain('https://snapapi.eu/changelog')
   })
 
   it('index.html has links to new pages', () => {
     const index = fs.readFileSync(path.join(publicDir, 'index.html'), 'utf-8')
     expect(index).toContain('/compare')
     expect(index).toContain('/guides/quick-start')
+    expect(index).toContain('/pricing')
+  })
+
+  it('footer has changelog link', () => {
+    const index = fs.readFileSync(path.join(publicDir, 'index.html'), 'utf-8')
+    expect(index).toContain('/changelog')
   })
 })