feat(ui): refine input states, add tokenized params & ripple effects

- Refactored Url Cleaner Exception 'Keep params' into a tokenized input array (pills/badges)
- Standardized UI contrast: ensured proper label highlighting in light/dark themes
- Expanded v-ripple interaction effect to buttons across all remaining tools, header, and modals
- Moved base .detail-tag styles into global CSS variables
- Web worker generation for QR codes (WIP)

src/workers/qrcode.worker.js

@@ -0,0 +1,22 @@
+import QRCode from 'qrcode'
+
+self.onmessage = async (e) => {
+    const { id, text, ecc } = e.data
+
+    if (!text) {
+        self.postMessage({ id, svgContent: '' })
+        return
+    }
+
+    try {
+        const svgContent = await QRCode.toString(text, {
+            type: 'svg',
+            errorCorrectionLevel: ecc,
+            margin: 1,
+        })
+
+        self.postMessage({ id, svgContent })
+    } catch (err) {
+        self.postMessage({ id, error: err.message })
+    }
+}