feat(frontend)!: sveltekit 3 on the v0.7.0 template, typescript 6, adapter-auto dropped; backend base moves to trixie

frontend/biome.jsonc

@@ -34,6 +34,7 @@
           },
           "a11y": {
             "noSvgWithoutTitle": "warn",
+            "useAnchorContent": "off",
             "useButtonType": "warn"
           }
         }