feat: multi-profile support and UI improvements

- Remove backend restriction on one merchant per user
- Add "Generate New Key" dialog with npub/nsec display
- Add "Import Existing Key" option with duplicate check
- Change "Save" to "Save & Publish" in edit profile dialog
- Remove standalone Publish button (now part of Save)
- Add trash icon to saved profile for removal
- Show display_name in saved profiles dropdown
- Hide nsec by default with eye toggle in generate dialog

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

static/components/edit-profile-dialog.js

@@ -50,10 +50,16 @@ window.app.component('edit-profile-dialog', {
           this.adminkey,
           config
         )
+        // Publish to Nostr
+        await LNbits.api.request(
+          'PUT',
+          `/nostrmarket/api/v1/merchant/${this.merchantId}/nostr`,
+          this.adminkey
+        )
         this.show = false
         this.$q.notify({
           type: 'positive',
-          message: 'Profile updated!'
+          message: 'Profile saved and published to Nostr!'
         })
         this.$emit('profile-updated')
       } catch (error) {

static/js/index.js

@@ -18,6 +18,13 @@ window.app = Vue.createApp({
           privateKey: null
         }
       },
+      generateKeyDialog: {
+        show: false,
+        privateKey: null,
+        nsec: null,
+        npub: null,
+        showNsec: false
+      },
       wsConnection: null,
       nostrStatus: {
         connected: false,
@@ -41,9 +48,18 @@ window.app = Vue.createApp({
     }
   },
   methods: {
-    generateKeys: async function () {
+    generateKeys: function () {
       const privateKey = nostr.generatePrivateKey()
-      await this.createMerchant(privateKey)
+      const publicKey = nostr.getPublicKey(privateKey)
+      this.generateKeyDialog.privateKey = privateKey
+      this.generateKeyDialog.nsec = nostr.nip19.nsecEncode(privateKey)
+      this.generateKeyDialog.npub = nostr.nip19.npubEncode(publicKey)
+      this.generateKeyDialog.showNsec = false
+      this.generateKeyDialog.show = true
+    },
+    confirmGenerateKey: async function () {
+      this.generateKeyDialog.show = false
+      await this.createMerchant(this.generateKeyDialog.privateKey)
     },
     importKeys: async function () {
       this.importKeyDialog.show = false
@@ -55,11 +71,21 @@ window.app = Vue.createApp({
         if (privateKey.toLowerCase().startsWith('nsec')) {
           privateKey = nostr.nip19.decode(privateKey).data
         }
+        // Check if this key is already in use
+        const publicKey = nostr.getPublicKey(privateKey)
+        if (this.merchant?.public_key === publicKey) {
+          this.$q.notify({
+            type: 'warning',
+            message: 'This key is already your current profile'
+          })
+          return
+        }
       } catch (error) {
         this.$q.notify({
           type: 'negative',
           message: `${error}`
         })
+        return
       }
       await this.createMerchant(privateKey)
     },