Remove test client creation functionality from admin extension

Client registration will now be handled by the DCA client extension.
The admin extension focuses solely on:
- Reading existing clients
- Managing deposits (pending → confirmed workflow)
- Monitoring DCA activity

Test client creation code preserved in 'feature/test-client-creation' branch.

🤖 Generated with Claude Code

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

static/js/index.js

@@ -286,34 +286,6 @@ window.app = Vue.createApp({
       }
     },
 
-    // Test Client Creation (temporary for testing)
-    async createTestClient() {
-      try {
-        const testData = {
-          user_id: this.g.user.id,
-          wallet_id: this.g.user.wallets[0].id,
-          username: this.g.user.username || `user_${this.g.user.id.substring(0, 8)}`,
-          dca_mode: 'flow'
-        }
-
-        const { data: newClient } = await LNbits.api.request(
-          'POST',
-          '/satmachineadmin/api/v1/dca/clients',
-          this.g.user.wallets[0].adminkey,
-          testData
-        )
-
-        this.dcaClients.push(newClient)
-
-        this.$q.notify({
-          type: 'positive',
-          message: 'Test client created successfully!',
-          timeout: 5000
-        })
-      } catch (error) {
-        LNbits.utils.notifyApiError(error)
-      }
-    },
 
     // Quick Deposit Methods
     async sendQuickDeposit() {

templates/satmachineadmin/index.html

@@ -95,15 +95,6 @@
               <q-icon name="info" color="orange" />
             </template>
             No DCA clients registered yet. Clients must first install and configure the DCA client extension.
-            <template v-slot:action>
-              <q-btn 
-                flat 
-                color="orange" 
-                label="Create Test Client" 
-                @click="createTestClient"
-                size="sm"
-              />
-            </template>
           </q-banner>
         </div>
         

views_api.py

@@ -12,7 +12,6 @@ from starlette.exceptions import HTTPException
 
 from .crud import (
     # DCA CRUD operations
-    create_dca_client,
     get_dca_clients,
     get_dca_client,
     update_dca_client,
@@ -36,7 +35,6 @@ from .crud import (
 )
 from .models import (
     # DCA models
-    CreateDcaClientData,
     DcaClient,
     UpdateDcaClientData,
     CreateDepositData,
@@ -85,14 +83,6 @@ async def api_get_dca_client(
 # Admin extension only reads existing clients and manages their deposits
 
 
-# TEMPORARY: Test client creation endpoint (remove in production)
-@satmachineadmin_api_router.post("/api/v1/dca/clients", status_code=HTTPStatus.CREATED)
-async def api_create_test_dca_client(
-    data: CreateDcaClientData,
-    wallet: WalletTypeInfo = Depends(require_admin_key),
-) -> DcaClient:
-    """Create a test DCA client (temporary for testing)"""
-    return await create_dca_client(data)
 
 
 @satmachineadmin_api_router.get("/api/v1/dca/clients/{client_id}/balance")