chore(biome): scope linting to remove Svelte false positives

- Disable noUnusedImports/noUnusedVariables for *.svelte: biome parses only
  the <script> block, not templates or $store auto-subscriptions, so these
  fired as ~744 false positives. svelte-check + tsconfig noUnusedLocals/
  noUnusedParameters still catch genuinely-unused code.
- Disable noImportantStyles for stylesheets: !important is deliberate here,
  including the prefers-reduced-motion a11y reset, which requires it.
- Exclude static/styles (vendored LaTeX.css + risotto theme) from biome.

1 files changed, 25 insertions, 2 deletions

diff --git a/biome.json b/biome.json
index 5f8a7043..dfd9deac 100644
--- a/biome.json
+++ b/biome.json
@@ -6,7 +6,8 @@
 		"useIgnoreFile": true
 	},
 	"files": {
-		"ignoreUnknown": true
+		"ignoreUnknown": true,
+		"includes": ["**", "!static/styles"]
 	},
 	"formatter": {
 		"enabled": true
@@ -17,5 +18,27 @@
 			"recommended": true
 		}
 	},
-	"overrides": []
+	"overrides": [
+		{
+			"includes": ["**/*.svelte"],
+			"linter": {
+				"rules": {
+					"correctness": {
+						"noUnusedImports": "off",
+						"noUnusedVariables": "off"
+					}
+				}
+			}
+		},
+		{
+			"includes": ["**/*.css", "**/*.scss", "**/*.svelte"],
+			"linter": {
+				"rules": {
+					"complexity": {
+						"noImportantStyles": "off"
+					}
+				}
+			}
+		}
+	]
 }