feat: persist last open note and add currency pills

src/App.css

@@ -572,6 +572,25 @@ body {
   border-radius: 2px;
 }
 
+.cm-currency-pill {
+  display: inline-block;
+  background-color: rgba(13, 148, 136, 0.15); /* Teal */
+  color: #0d9488;
+  padding: 0px 6px;
+  border-radius: 4px;
+  font-family: inherit;
+  font-weight: 500;
+  font-size: 0.95em;
+  margin: 0 2px;
+  border: 1px solid rgba(13, 148, 136, 0.3);
+}
+
+.cm-currency-highlight {
+  color: #0d9488;
+  background-color: rgba(13, 148, 136, 0.1);
+  border-radius: 2px;
+}
+
 .cm-tag-pill {
   display: inline-block;
   background-color: rgba(59, 130, 246, 0.15); /* Blue */

src/App.tsx

@@ -59,7 +59,7 @@
 const numberPlugin = ViewPlugin.fromClass(
   class {
     decorations
     constructor(view: any) {
       this.decorations = numberMatcher.createDeco(view)
     }
     update(update: any) {
@@ -450,6 +450,26 @@
           }
         }
 
+        // Currency Formats
+        const reCurrency = /[$€£¥₹]\s*\d+(?:,\d{3})*(?:\.\d{1,2})?/g
+        while ((match = reCurrency.exec(text)) !== null) {
+          const start = from + match.index
+          const end = start + match[0].length
+          if (!isCursorInMatch(start, end)) {
+            decos.push({
+              from: start,
+              to: end,
+              deco: Decoration.mark({ class: 'cm-currency-pill' }),
+            })
+          } else {
+            decos.push({
+              from: start,
+              to: end,
+              deco: Decoration.mark({ class: 'cm-currency-highlight' }),
+            })
+          }
+        }
+
         // Tags (!tag)
         const reTag = /![a-zA-Z0-9_-]+/g
         while ((match = reTag.exec(text)) !== null) {
@@ -707,6 +727,12 @@
     currentNoteIndexRef.current = currentNoteIndex
   }, [currentNoteIndex])
 
+  useEffect(() => {
+    if (notes.length > 0 && currentNoteIndex >= 0 && currentNoteIndex < notes.length) {
+      localStorage.setItem('papercache-last-open-note', notes[currentNoteIndex].id)
+    }
+  }, [currentNoteIndex, notes])
+
   useEffect(() => {
     if (showNoteSearch && searchInputRef.current) {
       setTimeout(() => {
@@ -723,6 +749,13 @@
       const loaded = await window.electronAPI.getNotes()
       if (loaded.length > 0) {
         setNotes(loaded)
+        const lastOpenNoteId = localStorage.getItem('papercache-last-open-note')
+        if (lastOpenNoteId) {
+          const idx = loaded.findIndex((n: Note) => n.id === lastOpenNoteId)
+          if (idx !== -1) {
+            setCurrentNoteIndex(idx)
+          }
+        }
       }
     }
     loadNotes()