Use one name for each thing the UI shows (closes #399)

The database target type is called an archive on its badge, in the add target form's type list and on its edit page, and its settings read "Archive expiry" and "Archive rotation" everywhere, the new webhook page included. The retry field is labelled "Delivery attempts", with its help text and error messages to match, on both target forms and in the target list, where a stored 0 shows as one attempt. The target list's other labels take the same capitalisation. The navbar says "Sign out" and the sign-in page "Sign in", and the README follows. The resubmit notice says "webhook". The stored values (`database`, `max_retries`) and their meaning are unchanged.

Model: opus-5-5

templates/target_edit.html

@@ -7,7 +7,7 @@
     <div class="mb-6">
         <a href="/hook/{{.Webhook.ID}}" class="btn-small">&larr; Back to {{.Webhook.Name}}</a>
         <h1 class="text-2xl font-medium text-gray-900 mt-2">Edit Target</h1>
-        <p class="text-sm text-gray-500 mt-1">Type: {{.Target.Type}}. A target's type cannot be changed; create a new target to deliver a different way.</p>
+        <p class="text-sm text-gray-500 mt-1">Type: {{if eq .Target.Type "database"}}archive{{else}}{{.Target.Type}}{{end}}. A target's type cannot be changed; create a new target to deliver a different way.</p>
     </div>
 
     <div class="card p-6">
@@ -59,7 +59,7 @@
 
             {{if eq .Target.Type "database"}}
             <div class="form-group">
-                <label for="expiry" class="label">Archive Expiry</label>
+                <label for="expiry" class="label">Archive expiry</label>
                 <select id="expiry" name="expiry" class="input">
                     {{range .ArchiveExpiryChoices}}
                     <option value="{{.Value}}"{{if .Selected}} selected{{end}}>{{.Label}}</option>
@@ -69,7 +69,7 @@
             </div>
 
             <div class="form-group">
-                <label for="rotation" class="label">Archive Rotation</label>
+                <label for="rotation" class="label">Archive rotation</label>
                 <select id="rotation" name="rotation" class="input">
                     {{range .ArchiveRotationChoices}}
                     <option value="{{.Value}}"{{if .Selected}} selected{{end}}>{{.Label}}</option>
@@ -81,9 +81,9 @@
 
             {{if or (eq .Target.Type "http") (eq .Target.Type "slack")}}
             <div class="form-group">
-                <label for="max_retries" class="label">Max retries</label>
+                <label for="max_retries" class="label">Delivery attempts</label>
                 <input type="number" id="max_retries" name="max_retries" value="{{.TargetForm.MaxRetries}}" min="0" max="20" class="input">
-                <p class="text-xs text-gray-500 mt-1">This is the total number of delivery attempts, not retries on top of the first: a value of 3 makes three attempts in all. 0 means a single attempt with no retries and no circuit breaker.</p>
+                <p class="text-xs text-gray-500 mt-1">How many times each delivery is attempted in all, the first attempt included. 0 means a single attempt with no retries and no circuit breaker.</p>
             </div>
             {{end}}