feat(12-02): wire all template strings to Alpine i18n store

- dashboard.html: headings, quick actions, empty states wired to x-text
- printers.html: h1, add button, h2 wired to x-text
- printers_new.html: all form labels (span pattern), options, submit buttons wired
- clients.html: headings, label, submit button wired
- client_detail.html: back link, section heading wired
- drivers.html: all headings, label, buttons, spinner wired
- packages.html: heading, description, table headers, empty state wired
- printer_detail.html: all dt/dd, section headings, copy buttons, script/export links wired with conditional Jinja2 for color/collate/client
- partials/printer_list.html: table headers, Yes/No cells (Alpine ternary), delete button wired
- partials/printer_edit_modal.html: edit trigger, modal title, all labels (span pattern), options, save/cancel wired
- partials/client_list.html: empty state, table headers wired
- partials/driver_list.html: table headers, unknown values, empty state wired
- Fix test_printers_library_no_form: check form element attribute instead of UI label string (now in i18n dict)

imptune/templates/printers_new.html

@@ -1,20 +1,20 @@
 {% extends "base.html" %}
 
 {% block content %}
-<h1>Add Printer</h1>
+<h1 x-data x-text="$store.i18n.t('add_printer_title')">Add Printer</h1>
 
-<p><a href="/printers">&larr; Back to Printer Library</a></p>
+<p><a href="/printers" x-data x-text="$store.i18n.t('back_to_printer_library')">&larr; Back to Printer Library</a></p>
 
 <div x-data="{ ip: '', port: '', portEdited: false }">
   <form action="/printers" method="post">
 
     <label>
-      Printer Name
+      <span x-text="$store.i18n.t('printer_name')">Printer Name</span>
       <input type="text" name="name" placeholder="e.g. HP LaserJet 4050" required>
     </label>
 
     <label>
-      IP Address
+      <span x-text="$store.i18n.t('ip_address')">IP Address</span>
       <input type="text" name="ip_address"
              x-model="ip"
              @input="if (!portEdited) port = 'IP_' + ip.replaceAll('.', '_')"
@@ -23,7 +23,7 @@
     </label>
 
     <label>
-      Port Name
+      <span x-text="$store.i18n.t('port_name')">Port Name</span>
       <input type="text" name="port_name"
              x-model="port"
              @change="portEdited = true"
@@ -32,9 +32,9 @@
     </label>
 
     <label>
-      Driver
+      <span x-text="$store.i18n.t('driver')">Driver</span>
       <select name="driver_id" id="printer-form-driver-select">
-        <option value="">-- No driver --</option>
+        <option value="" x-text="$store.i18n.t('no_driver_option')">-- No driver --</option>
         {% for item in driver_data %}
         <option value="{{ item.driver.id }}">
           {{ item.driver.original_filename }} ({{ item.names | join(', ') }})
@@ -44,21 +44,21 @@
     </label>
 
     <label>
-      Duplex Mode
+      <span x-text="$store.i18n.t('duplex_mode')">Duplex Mode</span>
       <select name="duplex_mode">
-        <option value="OneSided" selected>One-Sided</option>
-        <option value="LongEdge">Long Edge</option>
-        <option value="ShortEdge">Short Edge</option>
+        <option value="OneSided" selected x-text="$store.i18n.t('one_sided')">One-Sided</option>
+        <option value="LongEdge" x-text="$store.i18n.t('long_edge')">Long Edge</option>
+        <option value="ShortEdge" x-text="$store.i18n.t('short_edge')">Short Edge</option>
       </select>
     </label>
 
     <label>
       <input type="checkbox" name="color_mode" value="on" checked>
-      Color Mode
+      <span x-text="$store.i18n.t('color_mode')">Color Mode</span>
     </label>
 
     <label>
-      Paper Size
+      <span x-text="$store.i18n.t('paper_size')">Paper Size</span>
       <select name="paper_size">
         <option value="A4" selected>A4</option>
         <option value="Letter">Letter</option>
@@ -68,20 +68,20 @@
 
     <label>
       <input type="checkbox" name="collate" value="on" checked>
-      Collate
+      <span x-text="$store.i18n.t('collate')">Collate</span>
     </label>
 
     <label>
-      Client
+      <span x-text="$store.i18n.t('client')">Client</span>
       <select name="client_id">
-        <option value="">-- Unassigned --</option>
+        <option value="" x-text="$store.i18n.t('unassigned_option')">-- Unassigned --</option>
         {% for c in clients %}
         <option value="{{ c.id }}">{{ c.name }}</option>
         {% endfor %}
       </select>
     </label>
 
-    <button type="submit">Save Printer</button>
+    <button type="submit" x-text="$store.i18n.t('save_printer')">Save Printer</button>
   </form>
 
   <form hx-post="/drivers/upload"
@@ -90,10 +90,10 @@
         hx-swap="outerHTML">
     <input type="hidden" name="caller" value="printer_form">
     <label>
-      Upload New Driver
+      <span x-text="$store.i18n.t('upload_new_driver')">Upload New Driver</span>
       <input type="file" name="file" accept=".zip" required>
     </label>
-    <button type="submit" class="secondary">Upload Driver</button>
+    <button type="submit" class="secondary" x-text="$store.i18n.t('upload_driver')">Upload Driver</button>
   </form>
   <div id="driver-list" style="display:none"></div>
 </div>