chore: upgrade amp_demos tools and dependencies (#40)

- Upgrade Node 22.20.0 → 25.0.0 for React and Svelte demos
- Upgrade Gradle 9.0.0 → 9.1.0 for Java demos
- Keep Java at version 21 (Kotlin compatibility)
- Upgrade React to 19.2.0 and Vite to 7.1.11
- Upgrade SvelteKit to 2.47.2 and Svelte to 5.41.2
- Upgrade Ktor logback dependency 1.5.19 → 1.5.20
- Update Flask dependencies via uv lock
- Update Spring Boot Java compatibility to 21

All demos verified with successful builds.

Amp-Thread-ID: https://ampcode.com/threads/T-a45340ad-a9dc-4604-b25b-347c8dd08e60

Co-authored-by: Amp <amp@ampcode.com>

Author: trly

amp_demos/java/.mise.toml

@@ -1,3 +1,3 @@
 [tools]
-gradle = "9.0.0"
+gradle = "9.1.0"
 java = "temurin-21"

amp_demos/java/ktor/gradle/libs.versions.toml

@@ -1,7 +1,7 @@
 [versions]
 kotlin = "2.2.20"
 ktor = "3.3.0"
-logback = "1.5.19"
+logback = "1.5.20"
 
 [libraries]
 ktor-server-core = { module = "io.ktor:ktor-server-core", version.ref = "ktor" }

amp_demos/java/ktor/gradle/wrapper/gradle-wrapper.jar

@@ -8,8 +8,8 @@ group = 'com.sourcegraph.revenue'
 version = '0.0.1-SNAPSHOT'
 
 java {
-    sourceCompatibility = '17'
-    targetCompatibility = '17'
+    sourceCompatibility = '21'
+    targetCompatibility = '21'
 }
 
 repositories {

amp_demos/java/ktor/gradlew

@@ -1,5 +1,5 @@
 [tools]
-node = "22.20.0"
+node = "25.0.0"
 
 [tasks.install]
 description = "Install dependencies"

amp_demos/java/ktor/gradlew.bat

@@ -16,6 +16,6 @@
     "@types/react": "19.2.2",
     "@types/react-dom": "19.2.2",
     "@vitejs/plugin-react": "5.0.4",
-    "vite": "7.1.9"
+    "vite": "7.1.11"
   }
 }