feat(obsidian): add manual browse option for coordinate matches

Problem: When a single note was found by coordinates, it would
automatically load that note without giving the user any choice.
This removed the ability to manually browse/search for a different note.

Solution: Add showSingleMatchDialog() that appears when one note is
found by coordinates, giving the user 3 options:
1. "Use This Note" - Use the matched note (default/fast path)
2. "Browse/Search" - Manually browse/search for a different note
3. "Cancel" - Close without doing anything

This gives users control over note selection in all scenarios:
- Linked note found (via FMG ID) → Can choose different note
- Single match by coordinates → Can choose different note
- Multiple matches → Selection dialog (already had manual option)
- No matches → Browse/search/create dialog

Now users always have the option to manually browse, regardless of
what the automatic search finds.

modules/ui/obsidian-notes-editor.js

@@ -44,15 +44,16 @@ async function findOrCreateNote(elementId, elementType, coordinates) {
   }
 
   if (matches.length === 1) {
-    // Single match - load it
+    // Single match - show dialog with option to use it or choose different one
     const match = matches[0];
     const content = await ObsidianBridge.getNote(match.path);
-    return {
+    const noteData = {
       path: match.path,
       name: match.name,
       content,
       frontmatter: match.frontmatter
     };
+    return await showSingleMatchDialog(noteData, elementId, elementType, coordinates);
   }
 
   // Multiple matches - show selection dialog
@@ -99,6 +100,46 @@ async function showLinkedNoteDialog(note, elementId, elementType, coordinates) {
   });
 }
 
+async function showSingleMatchDialog(note, elementId, elementType, coordinates) {
+  return new Promise((resolve, reject) => {
+    alertMessage.innerHTML = `
+      <div style="padding: 1em;">
+        <p style="margin-bottom: 1em;"><strong>✓ Found note by coordinates:</strong></p>
+        <div style="padding: 12px; background: #f0fff0; border: 1px solid #00aa00; border-radius: 4px; margin-bottom: 1.5em;">
+          <div style="font-weight: bold; margin-bottom: 4px;">${note.name}</div>
+          <div style="font-size: 0.9em; color: #666;">Path: ${note.path}</div>
+        </div>
+        <p style="font-size: 0.9em; color: #666;">Found a note near this location. You can use it or browse for a different one.</p>
+      </div>
+    `;
+
+    $("#alert").dialog({
+      title: "Note Found Nearby",
+      width: "500px",
+      buttons: {
+        "Use This Note": function () {
+          $(this).dialog("close");
+          resolve(note);
+        },
+        "Browse/Search": async function () {
+          $(this).dialog("close");
+          try {
+            const differentNote = await promptCreateNewNote(elementId, elementType, coordinates);
+            resolve(differentNote);
+          } catch (error) {
+            reject(error);
+          }
+        },
+        Cancel: function () {
+          $(this).dialog("close");
+          reject(new Error("Cancelled"));
+        }
+      },
+      position: {my: "center", at: "center", of: "svg"}
+    });
+  });
+}
+
 function showLoadingDialog() {
   alertMessage.innerHTML = `
     <div style="text-align: center; padding: 2em;">