Add Ignore button to auto-detect warnings for permanent per-value dismissal

The × close button only hid the warning for the current send — the same
detection reappeared on every subsequent send with no way to silence it.

Added an Ignore button to each item in both the on-send warning
(showAutoDetectWarning) and the pre-send input scanner warning
(showPreSendWarning). Clicking Ignore:
- Adds the specific value to an in-memory Set (ignoredDetections)
- Persists it to ss_ignored_detections in storage
- Removes that item from the current warning; closes the popup if empty

On page load, ss_ignored_detections is read from storage so ignores
survive page reloads. Ignored values are also filtered before
auto-redaction in the fetch interceptor, so they are not redacted either.

https://claude.ai/code/session_01CwcZK8nqL8pyBH9AxDs9qo

src/content/content.css

@@ -220,6 +220,18 @@
 .ss-ps-add:hover { background: rgba(74, 222, 128, 0.15); }
 .ss-ps-add:disabled { border-color: #333; cursor: default; }
 
+.ss-ad-ignore {
+  margin-left: 4px;
+  padding: 2px 6px;
+  font-size: 11px;
+  background: transparent;
+  border: 1px solid #555;
+  border-radius: 4px;
+  color: #888;
+  cursor: pointer;
+}
+.ss-ad-ignore:hover { border-color: #888; color: #ccc; }
+
 /* Floating reveal mode indicator */
 .ss-reveal-badge {
   position: fixed;

src/content/content.js

@@ -16,6 +16,8 @@
   let mappings = [];
   let identity = {};
   let settings = { enabled: true, revealMode: false, showHighlights: false };
+  // Values the user has permanently dismissed from auto-detect warnings
+  let ignoredDetections = new Set();
 
   try {
     const configEl = document.querySelector('script[data-ss-config]');
@@ -278,7 +280,8 @@
     // 4. Auto-detect: scan the FINAL text for unconfigured PII
     //    Auto-redact if enabled, otherwise just warn
     if (settings.autoDetect !== false) {
-      const warnings = autoDetectPII(finalText, identity, { detectProperNouns: settings.detectProperNouns === true });
+      const warnings = autoDetectPII(finalText, identity, { detectProperNouns: settings.detectProperNouns === true })
+        .filter(w => !ignoredDetections.has(w.value));
       if (warnings.length > 0) {
         // Auto-redact detected PII in the outbound text
         if (settings.autoRedactDetected !== false) {
@@ -516,6 +519,7 @@
         <span class="ss-ad-type">${w.name}</span>
         <code class="ss-ad-value">${w.value.length > 30 ? w.value.slice(0, 27) + '...' : w.value}</code>
         <span class="ss-ad-hint">${w.hint}</span>
+        <button class="ss-ad-ignore" data-value="${encodeURIComponent(w.value)}" title="Never warn about this again">Ignore</button>
       </div>`
     ).join('');
 
@@ -533,11 +537,24 @@
 
     warningEl.classList.add('visible');
 
-    // Close button
+    // Close button — hides for this session
     warningEl.querySelector('.ss-ad-close').addEventListener('click', () => {
       warningEl.classList.remove('visible');
     });
 
+    // Ignore buttons — permanently dismiss a specific value
+    warningEl.querySelectorAll('.ss-ad-ignore').forEach(btn => {
+      btn.addEventListener('click', () => {
+        const val = decodeURIComponent(btn.dataset.value);
+        ignoredDetections.add(val);
+        setStorageData('ss_ignored_detections', [...ignoredDetections]);
+        btn.closest('.ss-ad-item').remove();
+        if (!warningEl.querySelector('.ss-ad-item')) {
+          warningEl.classList.remove('visible');
+        }
+      });
+    });
+
     // Auto-dismiss after 15 seconds
     if (warningTimeout) clearTimeout(warningTimeout);
     warningTimeout = setTimeout(() => {
@@ -1348,6 +1365,7 @@
         ${settings.autoAddDetected !== false
           ? `<button class="ss-ps-add" data-real="${encodeURIComponent(w.value)}" data-fake="${encodeURIComponent(fake)}" data-cat="${w.category}" title="Add mapping: ${displayVal} → ${fake}">+</button>`
           : ''}
+        <button class="ss-ad-ignore" data-value="${encodeURIComponent(w.value)}" title="Never warn about this again">Ignore</button>
       </div>`;
     }).join('');
 
@@ -1410,6 +1428,19 @@
         btn.disabled = true;
       });
     });
+
+    // Ignore buttons — permanently dismiss a specific value
+    preSendWarningEl.querySelectorAll('.ss-ad-ignore').forEach(btn => {
+      btn.addEventListener('click', () => {
+        const val = decodeURIComponent(btn.dataset.value);
+        ignoredDetections.add(val);
+        setStorageData('ss_ignored_detections', [...ignoredDetections]);
+        btn.closest('.ss-ps-item').remove();
+        if (!preSendWarningEl.querySelector('.ss-ps-item')) {
+          preSendWarningEl.classList.remove('visible');
+        }
+      });
+    });
   }
 
   // Replace all occurrences of `real` with `fake` in an input or contenteditable element
@@ -1464,7 +1495,8 @@
       return;
     }
 
-    const warnings = autoDetectPII(text, identity, { detectProperNouns: settings.detectProperNouns === true });
+    const warnings = autoDetectPII(text, identity, { detectProperNouns: settings.detectProperNouns === true })
+      .filter(w => !ignoredDetections.has(w.value));
     if (warnings.length > 0) {
       showPreSendWarning(warnings, target);
     } else if (preSendWarningEl) {
@@ -1542,6 +1574,11 @@
     document.addEventListener('DOMContentLoaded', boot);
   }
 
+  // Load permanently-ignored detections from storage
+  getStorageData('ss_ignored_detections').then(data => {
+    if (Array.isArray(data)) ignoredDetections = new Set(data);
+  });
+
   // Also update badge when settings change
   const origCheckReveal = checkRevealToggle;
   checkRevealToggle = function () {