frontend: improve launch UI and refactor stream to new page

frontend/pnpm-lock.yaml

@@ -7,6 +7,10 @@ settings:
 importers:
 
   .:
+    dependencies:
+      svelte-loading-spinners:
+        specifier: ^0.3.6
+        version: 0.3.6
     devDependencies:
       '@eslint/compat':
         specifier: ^1.2.5
@@ -1307,6 +1311,9 @@ packages:
       svelte:
         optional: true
 
+  svelte-loading-spinners@0.3.6:
+    resolution: {integrity: sha512-mthHQ2TwiwzTWzbFry3CBnVEfzqPOD9WkVw84OfSYzHRq6N9wgQ+yv37u81uPeuLU/ZOIPqhujpXquB1aol5ZQ==}
+
   svelte@5.36.12:
     resolution: {integrity: sha512-c3mWT+b0yBLl3gPGSHiy4pdSQCsPNTjLC0tVoOhrGJ6PPfCzD/RQpAmAfJtQZ304CAae2ph+L3C4aqds3R3seQ==}
     engines: {node: '>=18'}
@@ -2480,6 +2487,8 @@ snapshots:
     optionalDependencies:
       svelte: 5.36.12
 
+  svelte-loading-spinners@0.3.6: {}
+
   svelte@5.36.12:
     dependencies:
       '@ampproject/remapping': 2.3.0