feat: add merchant profile edit, keys dialog, and publish to Nostr

- Add PATCH endpoint for updating merchant profile config
- Add website field to MerchantProfile model
- Fix to_nostr_event to include all profile fields (display_name, banner, website, nip05, lud16)
- Always publish merchant profile (kind 0) when publishing to Nostr
- Extract edit-profile-dialog and nostr-keys-dialog into separate components
- Fix profile avatar alignment to match original design
- Simplify keys dialog to show only npub QR code (no nsec QR)

🤖 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

@@ -0,0 +1,85 @@
+window.app.component('edit-profile-dialog', {
+  name: 'edit-profile-dialog',
+  template: '#edit-profile-dialog',
+  delimiters: ['${', '}'],
+  props: ['model-value', 'merchant-id', 'merchant-config', 'adminkey'],
+  emits: ['update:model-value', 'profile-updated'],
+  data: function () {
+    return {
+      saving: false,
+      formData: {
+        name: '',
+        display_name: '',
+        about: '',
+        picture: '',
+        banner: '',
+        website: '',
+        nip05: '',
+        lud16: ''
+      }
+    }
+  },
+  computed: {
+    show: {
+      get() {
+        return this.modelValue
+      },
+      set(value) {
+        this.$emit('update:model-value', value)
+      }
+    }
+  },
+  methods: {
+    saveProfile: async function () {
+      this.saving = true
+      try {
+        const config = {
+          ...this.merchantConfig,
+          name: this.formData.name || null,
+          display_name: this.formData.display_name || null,
+          about: this.formData.about || null,
+          picture: this.formData.picture || null,
+          banner: this.formData.banner || null,
+          website: this.formData.website || null,
+          nip05: this.formData.nip05 || null,
+          lud16: this.formData.lud16 || null
+        }
+        await LNbits.api.request(
+          'PATCH',
+          `/nostrmarket/api/v1/merchant/${this.merchantId}`,
+          this.adminkey,
+          config
+        )
+        this.show = false
+        this.$q.notify({
+          type: 'positive',
+          message: 'Profile updated!'
+        })
+        this.$emit('profile-updated')
+      } catch (error) {
+        LNbits.utils.notifyApiError(error)
+      } finally {
+        this.saving = false
+      }
+    },
+    loadFormData: function () {
+      if (this.merchantConfig) {
+        this.formData.name = this.merchantConfig.name || ''
+        this.formData.display_name = this.merchantConfig.display_name || ''
+        this.formData.about = this.merchantConfig.about || ''
+        this.formData.picture = this.merchantConfig.picture || ''
+        this.formData.banner = this.merchantConfig.banner || ''
+        this.formData.website = this.merchantConfig.website || ''
+        this.formData.nip05 = this.merchantConfig.nip05 || ''
+        this.formData.lud16 = this.merchantConfig.lud16 || ''
+      }
+    }
+  },
+  watch: {
+    modelValue(newVal) {
+      if (newVal) {
+        this.loadFormData()
+      }
+    }
+  }
+})