fix: PPI warning accept/ignore buttons — v2.0.14

Accept (+) button:
- Was reading raw storage (getStorageData) which returns encrypted
  blobs when encryption is enabled, silently failing to add mappings
- Fixed: adds directly to the local mappings array and persists via
  setStorageData (storage bridge handles encryption transparently)

Auto-detect false positives:
- Was only checking identity values, not explicit mappings — values
  already in the mappings table still got flagged as unconfigured PPI
- Fixed: now adds all mapping real/substitute values to the skip set

Ignore button:
- Changed from plain text link to grey pill button for better UX
- Still persists permanently via ss_ignored_ppi in storage

https://claude.ai/code/session_01SWSwDfMVij53bCTNSCLMwn

manifest.json

@@ -1,7 +1,7 @@
 {
   "manifest_version": 3,
   "name": "Silent Send",
-  "version": "2.0.13",
+  "version": "2.0.14",
   "description": "Intercepts personal info and substitutes it with user-defined replacements before sending to AI services.",
   "permissions": [
     "storage",