feat(frontend): add podman.live landing page + route split

Add a public marketing landing at "/" celebrating the Top-3 finish at the
AI Engineer World's Fair 2026 hackathon (2nd overall of 95+ teams, LiveKit
track + DigitalOcean Best Use), with a scroll-to-read hero, feature/tech
sections, and the demo embed.

Introduce react-router: "/" serves the public landing (no auth) and "/app"
mounts the existing Clerk-gated app. The app route degrades gracefully to a
"deploying" placeholder when no Clerk publishable key is configured, so the
site renders without secrets.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

pnpm-lock.yaml

@@ -154,6 +154,9 @@ importers:
       react-resizable-panels:
         specifier: ^4.11.2
         version: 4.11.2(react-dom@19.2.7(react@19.2.7))(react@19.2.7)
+      react-router-dom:
+        specifier: ^7.18.1
+        version: 7.18.1(react-dom@19.2.7(react@19.2.7))(react@19.2.7)
       recharts:
         specifier: 3.8.0
         version: 3.8.0(@types/react@19.2.17)(react-dom@19.2.7(react@19.2.7))(react-is@19.2.7)(react@19.2.7)(redux@5.0.1)
@@ -3838,6 +3841,10 @@ packages:
     resolution: {integrity: sha512-yki5XnKuf750l50uGTllt6kKILY4nQ1eNIQatoXEByZ5dWgnKqbnqmTrBE5B4N7lrMJKQ2ytWMiTO2o0v6Ew/w==}
     engines: {node: '>= 0.6'}
 
+  cookie@1.1.1:
+    resolution: {integrity: sha512-ei8Aos7ja0weRpFzJnEA9UHJ/7XQmqglbRwnf2ATjcB9Wq874VKH9kfjjirM6UhU2/E5fFYadylyhFldcqSidQ==}
+    engines: {node: '>=18'}
+
   copy-to-clipboard@3.3.3:
     resolution: {integrity: sha512-2KV8NhB5JqC3ky0r9PMCAZKbUHSwtEo4CwCs0KXgruG43gX5PMqDEBbVU4OUzw2MuAWUfsuFmWvEKG5QRfSnJA==}
 
@@ -5784,6 +5791,23 @@ packages:
       react: ^18.0.0 || ^19.0.0
       react-dom: ^18.0.0 || ^19.0.0
 
+  react-router-dom@7.18.1:
+    resolution: {integrity: sha512-KaZh+X/6UtEp28x51AUYZDMg9NGoz2ja3dNHa+ta/tk40vCzKhQ/RypCWBMLbmDr6//E24Vv5uPsrqXFozdkAg==}
+    engines: {node: '>=20.0.0'}
+    peerDependencies:
+      react: '>=18'
+      react-dom: '>=18'
+
+  react-router@7.18.1:
+    resolution: {integrity: sha512-GDLgg3i3uM0aeJO3Fm+TCS+sDQ7gu12T6x0qdTEzcwqEfleci7JwugVNIF3U//0FWKnJT7ptG+20B2jfDqnZAg==}
+    engines: {node: '>=20.0.0'}
+    peerDependencies:
+      react: '>=18'
+      react-dom: '>=18'
+    peerDependenciesMeta:
+      react-dom:
+        optional: true
+
   react-style-singleton@2.2.3:
     resolution: {integrity: sha512-b6jSvxvVnyptAiLjbkWLE/lOnR4lfTtDAl+eUC7RZy+QQWc6wRzIV2CE6xBuMmDxc2qIihtDCZD5NPOFl7fRBQ==}
     engines: {node: '>=10'}
@@ -5987,6 +6011,9 @@ packages:
   set-blocking@2.0.0:
     resolution: {integrity: sha512-KiKBS8AnWGEyLzofFfmvKwpdPzqiy16LvQfK3yv/fVH7Bj13/wl3JSR1J+rfgRE9q7xUJK4qvgS8raSOeLUehw==}
 
+  set-cookie-parser@2.7.2:
+    resolution: {integrity: sha512-oeM1lpU/UvhTxw+g3cIfxXHyJRc/uidd3yK1P242gzHds0udQBYzs3y8j4gCCW+ZJ7ad0yctld8RYO+bdurlvw==}
+
   set-function-length@1.2.2:
     resolution: {integrity: sha512-pgRc4hJ4/sNjWCSS9AmnS40x3bNMDTknHgL5UaMBTMyJnU90EgWh1Rz+MC9eFu4BuN/UwZjKQuY/1v3rM7HMfg==}
     engines: {node: '>= 0.4'}
@@ -10670,6 +10697,8 @@ snapshots:
 
   cookie@0.7.2: {}
 
+  cookie@1.1.1: {}
+
   copy-to-clipboard@3.3.3:
     dependencies:
       toggle-selection: 1.0.6
@@ -12806,6 +12835,20 @@ snapshots:
       react: 19.2.7
       react-dom: 19.2.7(react@19.2.7)
 
+  react-router-dom@7.18.1(react-dom@19.2.7(react@19.2.7))(react@19.2.7):
+    dependencies:
+      react: 19.2.7
+      react-dom: 19.2.7(react@19.2.7)
+      react-router: 7.18.1(react-dom@19.2.7(react@19.2.7))(react@19.2.7)
+
+  react-router@7.18.1(react-dom@19.2.7(react@19.2.7))(react@19.2.7):
+    dependencies:
+      cookie: 1.1.1
+      react: 19.2.7
+      set-cookie-parser: 2.7.2
+    optionalDependencies:
+      react-dom: 19.2.7(react@19.2.7)
+
   react-style-singleton@2.2.3(@types/react@19.2.17)(react@19.2.7):
     dependencies:
       get-nonce: 1.0.1
@@ -13104,6 +13147,8 @@ snapshots:
 
   set-blocking@2.0.0: {}
 
+  set-cookie-parser@2.7.2: {}
+
   set-function-length@1.2.2:
     dependencies:
       define-data-property: 1.1.4