Fix Configuring Jobs documentation - customer selection workflow

Corrected job approval workflow based on actual UI:

Customer Selection:
- Customers CANNOT be created from Inbox
- Customers must be created on Customers page first
- Customer field has autocomplete with fuzzy matching
- Can type any part of customer name (e.g., "toso" finds "Contoso")
- "Select customer" placeholder text shown
- Approve job button only enabled when customer selected

Email Detail Modal:
- Added detailed field descriptions (From, Backup, Type, Job, Overall, etc.)
- Details panel shows parsed backup report content
- Success/failure status with color-coded header
- Backup statistics (start/end time, duration, size, compression)
- Catalog information and version details
- Approve job (blue), Delete (red), Close (gray) buttons

Added Screenshot:
- approve-job.png: Shows inbox email detail modal with customer selection

Removed incorrect information about automatic customer creation.

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

containers/backupchecks/src/templates/documentation/customers-jobs/configuring-jobs.html

@@ -74,17 +74,42 @@
 <ol>
   <li>Navigate to <strong>Inbox</strong> in the main menu</li>
   <li>Find a backup report email in the inbox list</li>
-  <li>Click on the email to view its details</li>
-  <li>In the <strong>Customer</strong> field, select or enter the customer name
-    <ul>
-      <li>If the customer exists, select it from the dropdown</li>
-      <li>If the customer is new, type the name and it will be created automatically</li>
-    </ul>
-  </li>
-  <li>Click the <strong>Approve job</strong> button (enabled once a customer is selected)</li>
+  <li>Click on the email to view its details in a modal dialog</li>
 </ol>
 
-<p>The system will:</p>
+<figure>
+  <img src="{{ url_for('static', filename='images/documentation/approve-job.png') }}"
+       alt="Inbox Email Detail - Approve Job" />
+  <figcaption>Figure 1: Inbox email detail showing backup report information and customer selection field</figcaption>
+</figure>
+
+<h3>Selecting a Customer</h3>
+
+<p>In the email detail modal, you'll see a <strong>Customer</strong> field with "Select customer" placeholder text. This field has autocomplete functionality:</p>
+
+<ol>
+  <li>Click on the <strong>Customer</strong> field</li>
+  <li>Start typing part of the customer name (you can type any part, not just the beginning)
+    <ul>
+      <li>Example: typing "toso" will find "Contoso"</li>
+      <li>The autocomplete searches across the entire customer name</li>
+    </ul>
+  </li>
+  <li>Select the correct customer from the dropdown suggestions</li>
+</ol>
+
+<div class="doc-callout doc-callout-warning">
+  <strong>⚠️ Customer Must Exist First:</strong><br>
+  You <strong>cannot create new customers</strong> from the Inbox. Customers must be created on the <strong>Customers</strong> page before approving jobs. If the customer doesn't exist yet, cancel the dialog, create the customer first, then return to approve the job.
+</div>
+
+<h3>Approving the Job</h3>
+
+<p>Once you've selected a customer:</p>
+
+<ol>
+  <li>Click the <strong>Approve job</strong> button (blue button at the bottom left)</li>
+  <li>The system will:
     <ul>
       <li>Create a new backup job linked to the selected customer</li>
       <li>Apply the Mail Parser's configuration automatically</li>
@@ -92,12 +117,71 @@
       <li>Remove the email from the Inbox</li>
       <li>Make the run available in Run Checks for review</li>
     </ul>
+  </li>
+</ol>
 
 <div class="doc-callout doc-callout-tip">
-  <strong>💡 Customer Selection:</strong><br>
-  The <strong>Approve job</strong> button is only enabled when a customer is selected. If you type a new customer name, it will be created automatically when you approve the job.
+  <strong>💡 Workflow Best Practice:</strong><br>
+  The <strong>Approve job</strong> button is only enabled when a customer is selected. Create customers on the Customers page first, then approve jobs from the Inbox. This ensures proper customer naming and prevents duplicates.
 </div>
 
+<h2>Email Detail Information</h2>
+
+<p>When you click on an email in the Inbox, a detail modal displays the parsed backup report information:</p>
+
+<table>
+  <thead>
+    <tr>
+      <th>Field</th>
+      <th>Description</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><strong>From</strong></td>
+      <td>Email sender address</td>
+    </tr>
+    <tr>
+      <td><strong>Backup</strong></td>
+      <td>Detected backup software (e.g., Veeam, Acronis)</td>
+    </tr>
+    <tr>
+      <td><strong>Type</strong></td>
+      <td>Backup type (e.g., Configuration Job, Full, Incremental)</td>
+    </tr>
+    <tr>
+      <td><strong>Job</strong></td>
+      <td>Parsed job name from the email</td>
+    </tr>
+    <tr>
+      <td><strong>Overall</strong></td>
+      <td>Backup result (Success, Failed, Warning)</td>
+    </tr>
+    <tr>
+      <td><strong>Customer</strong></td>
+      <td>Customer selection field (autocomplete)</td>
+    </tr>
+    <tr>
+      <td><strong>Received</strong></td>
+      <td>Date and time the email was received</td>
+    </tr>
+    <tr>
+      <td><strong>Parsed</strong></td>
+      <td>Date and time the email was parsed</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>The <strong>Details</strong> panel on the right shows the parsed backup report content, including:</p>
+
+<ul>
+  <li>Success/failure status (green or red header)</li>
+  <li>Backup start time, end time, and duration</li>
+  <li>Data size, backup size, and compression ratio</li>
+  <li>Detailed catalog information (if available)</li>
+  <li>Version information (e.g., "Veeam Backup & Replication 12.3.2.4165")</li>
+</ul>
+
 <h2>What Mail Parsers Configure</h2>
 
 <p>When you approve a job, the Mail Parser automatically determines the following job configuration:</p>