Add/overwrite section cleanup and card title alignment

- Drop name field from add/overwrite (names set via inline slot editor)
- Move Set Code button inline with slot/PIN fields
- Narrow slot# field to 3-char width
- Fix card title alignment: use card-content div instead of ha-card padding
  so ha-card's shadow header and our content share the same left edge

custom_components/zlock_slots/frontend/zlock-slots-card.js

@@ -62,7 +62,7 @@ class ZLockSlotsCard extends HTMLElement {
     this.shadowRoot.innerHTML = `
       <style>
         :host { display: block; }
-        ha-card { padding: 16px; }
+        .card-content { padding: 16px; }
         h3 { margin: 0 0 12px; font-size: 1rem; font-weight: 600; }
         table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
         td { padding: 4px 8px; vertical-align: middle; }
@@ -84,8 +84,9 @@ class ZLockSlotsCard extends HTMLElement {
         .form-row { display: flex; flex-direction: column; gap: 4px; margin-bottom: 10px; }
         .form-row-inline { display: flex; gap: 10px; margin-bottom: 10px; }
         .form-row-inline .field { display: flex; flex-direction: column; gap: 4px; }
-        .form-row-inline .field.slot { width: 80px; }
+        .form-row-inline .field.slot { width: calc(3ch + 20px); }
         .form-row-inline .field.pin { width: 130px; }
+        .form-row-inline button.action { align-self: flex-end; }
         label { font-size: 0.8rem; opacity: 0.7; }
         input { padding: 6px 8px; border: 1px solid var(--divider-color, #ccc); border-radius: 4px; font-size: 0.9rem; background: var(--card-background-color, #fff); color: var(--primary-text-color); width: 100%; box-sizing: border-box; }
         button.action { background: var(--primary-color, #03a9f4); color: #fff; border: none; border-radius: 4px; padding: 8px 16px; cursor: pointer; font-size: 0.9rem; }
@@ -101,6 +102,7 @@ class ZLockSlotsCard extends HTMLElement {
         .name-display { cursor: text; }
       </style>
       <ha-card${this._config.title ? ` header="${this._config.title}"` : ""}>
+      <div class="card-content">
         <div class="section">
           <div class="status-row">
             <span><span class="status-label">Last action:</span> ${lastAction}</span>
@@ -158,20 +160,17 @@ class ZLockSlotsCard extends HTMLElement {
           <div class="form-row-inline">
             <div class="field slot">
               <label>Slot #</label>
-              <input id="add-slot" type="number" min="1" max="999" placeholder="e.g. 5" />
+              <input id="add-slot" type="number" min="1" max="999" placeholder="—" />
             </div>
             <div class="field pin">
               <label>PIN</label>
               <input id="add-code" type="password" minlength="4" maxlength="8" autocomplete="new-password" placeholder="4–8 digits" />
             </div>
+            <button class="action" id="add-btn">Set code</button>
           </div>
-          <div class="form-row">
-            <label>Name (optional)</label>
-            <input id="add-name" type="text" placeholder="e.g. Front door guest" />
-          </div>
-          <button class="action" id="add-btn">Set code</button>
-          <span id="add-status" style="margin-left:8px;font-size:0.85rem;opacity:0.7"></span>
+          <span id="add-status" style="font-size:0.85rem;opacity:0.7"></span>
         </div>
+      </div>
       </ha-card>
     `;
 
@@ -253,22 +252,19 @@ class ZLockSlotsCard extends HTMLElement {
     root.getElementById("add-btn")?.addEventListener("click", async () => {
       const slotInput = root.getElementById("add-slot");
       const codeInput = root.getElementById("add-code");
-      const nameInput = root.getElementById("add-name");
       const status = root.getElementById("add-status");
 
       const slot = parseInt(slotInput.value, 10);
       const code = codeInput.value.trim();
-      const name = nameInput.value.trim() || undefined;
 
       if (!slot || slot < 1) { status.textContent = "Enter a valid slot number."; return; }
       if (code.length < 4 || code.length > 8) { status.textContent = "PIN must be 4–8 digits."; return; }
 
       status.textContent = "Setting…";
       try {
-        await this._callService("set_code", { lock_entity_id: lock, slot, code, ...(name ? { name } : {}) });
+        await this._callService("set_code", { lock_entity_id: lock, slot, code });
         slotInput.value = "";
         codeInput.value = "";
-        nameInput.value = "";
         status.textContent = "Done.";
         setTimeout(() => { status.textContent = ""; }, 3000);
       } catch (err) {