chore: update code

src/app-options.js

@@ -69,6 +69,7 @@ export default {
             webSerialSupported: false,
             writingMCU: false,
             mcuStatus: '',
+            saveSettingsTimeout: null,
         }
     },
 
@@ -203,6 +204,25 @@ export default {
             return this.fixedCurrentA1 + this.fixedCurrentA2;
         }
     },
+    watch: {
+        fs: 'debouncedSaveSettings',
+        b_str: 'debouncedSaveSettings',
+        a_str: 'debouncedSaveSettings',
+        filterType: 'debouncedSaveSettings',
+        systemGain: 'debouncedSaveSettings',
+        params: { handler: 'debouncedSaveSettings', deep: true },
+        baseB: { handler: 'debouncedSaveSettings', deep: true },
+        baseA: { handler: 'debouncedSaveSettings', deep: true },
+        bSliders: { handler: 'debouncedSaveSettings', deep: true },
+        aSliders: { handler: 'debouncedSaveSettings', deep: true },
+        sense_b: 'debouncedSaveSettings',
+        sense_a: 'debouncedSaveSettings',
+        shiftBitsB: 'debouncedSaveSettings',
+        shiftBitsA: 'debouncedSaveSettings',
+        fixedOverrides: { handler: 'debouncedSaveSettings', deep: true },
+        aFineStep: 'debouncedSaveSettings',
+        fixedAFineStep: 'debouncedSaveSettings'
+    },
     mounted() {
         this.isTouchInput = window.matchMedia?.('(pointer: coarse)').matches || false;
         window.addEventListener('pointerdown', this.rememberPointerType);
@@ -214,6 +234,9 @@ export default {
         } else {
             document.documentElement.classList.remove('dark');
         }
+        
+        this.loadSettings();
+
         this.webSerialSupported = ('serial' in navigator);
         if (!this.webSerialSupported) {
             this.mcuStatus = '此瀏覽器不支援 Web Serial（需使用 Chrome 或 Edge，且透過 HTTPS 連線）';
@@ -230,6 +253,40 @@ export default {
         this.stopFixedAFineDrag();
     },
     methods: {
+        loadSettings() {
+            try {
+                const saved = localStorage.getItem('dea_settings');
+                if (saved) {
+                    const parsed = JSON.parse(saved);
+                    const keys = [
+                        'fs', 'b_str', 'a_str', 'filterType', 'systemGain', 'params',
+                        'baseB', 'baseA', 'bSliders', 'aSliders', 'sense_b', 'sense_a',
+                        'shiftBitsB', 'shiftBitsA', 'fixedOverrides', 'aFineStep', 'fixedAFineStep'
+                    ];
+                    keys.forEach(k => {
+                        if (parsed[k] !== undefined) {
+                            this[k] = parsed[k];
+                        }
+                    });
+                }
+            } catch (e) {
+                console.error('Failed to load settings:', e);
+            }
+        },
+        saveSettings() {
+            const keys = [
+                'fs', 'b_str', 'a_str', 'filterType', 'systemGain', 'params',
+                'baseB', 'baseA', 'bSliders', 'aSliders', 'sense_b', 'sense_a',
+                'shiftBitsB', 'shiftBitsA', 'fixedOverrides', 'aFineStep', 'fixedAFineStep'
+            ];
+            const settings = {};
+            keys.forEach(k => settings[k] = this[k]);
+            localStorage.setItem('dea_settings', JSON.stringify(settings));
+        },
+        debouncedSaveSettings() {
+            clearTimeout(this.saveSettingsTimeout);
+            this.saveSettingsTimeout = setTimeout(() => this.saveSettings(), 500);
+        },
         rememberPointerType(event) {
             if (event.pointerType === 'touch') {
                 this.isTouchInput = true;
@@ -595,7 +652,7 @@ export default {
                 this.outOfRangeB[i] = false;
                 if (base !== 0 && val !== 0 && (val / (base * gain)) > 0) {
                     let logVal = Math.log10(val / (base * gain));
-                    if (Math.abs(logVal) < 1e-12) logVal = 0; // 消除浮點數微小誤差
+                    if (Math.abs(logVal) < 1e-8) logVal = 0; // 消除浮點數微小誤差
                     if (Math.abs(logVal) > this.maxLogB) this.outOfRangeB[i] = true;
                     this.bSliders[i] = Math.max(-this.maxLogB, Math.min(this.maxLogB, logVal));
                 } else {
@@ -610,7 +667,7 @@ export default {
                 this.outOfRangeA[i] = false;
                 if (base !== 0 && val !== 0 && (val / base) > 0) {
                     let logVal = Math.log10(val / base);
-                    if (Math.abs(logVal) < 1e-12) logVal = 0; // 消除浮點數微小誤差
+                    if (Math.abs(logVal) < 1e-8) logVal = 0; // 消除浮點數微小誤差
                     if (Math.abs(logVal) > this.maxLogA) this.outOfRangeA[i] = true;
                     this.aSliders[i] = Math.max(-this.maxLogA, Math.min(this.maxLogA, logVal));
                 } else {