Initial commit: aplicatie de cantarire si etichetare

Aplicatie Flask + SQLite pentru productie alimentara: cantarirea
componentelor unui produs finit si tiparirea etichetei prin QZ Tray.

- produse finite (retete) formate din componente cantarite
- designer vizual de etichete (mm/px, zona sigura, campuri variabile,
  cod QR cu continut din mai multe bucati)
- legare produs finit -> sablon de eticheta
- navigare pe doua taburi: Cantarire / Setari
- administrare: componente, produse finite, sabloane, campuri, istoric
- backup, resetare baza de date, checklist de pregatire, /healthz
- CLI de administrare si serviciu systemd pentru productie
- vendor/syncpulse-scale-bridge (GPL-3.0-or-later) pentru citirea cantarului

cantarire/templates/components/form.html

@@ -0,0 +1,47 @@
+{% extends "base.html" %}
+{% block title %}{{ "Component nou" if is_new else "Editare component" }}{% endblock %}
+
+{% block content %}
+<section class="page-head">
+  <div>
+    <h1>{{ "Component nou" if is_new else "Editare component" }}</h1>
+    <p class="subtitle">Numele apare pe etichetă, lângă greutate.</p>
+  </div>
+</section>
+
+<section class="card narrow">
+  <form method="post" class="form">
+    <div class="field">
+      <label for="code">Cod <span class="req">*</span></label>
+      <input id="code" name="code" type="text" maxlength="40" required
+             value="{{ component.code or '' }}" autofocus>
+    </div>
+    <div class="field">
+      <label for="name">Denumire <span class="req">*</span></label>
+      <input id="name" name="name" type="text" maxlength="120" required
+             value="{{ component.name or '' }}" placeholder="ex. Fasole">
+    </div>
+    <div class="field">
+      <label for="unit">Unitate de măsură</label>
+      <select id="unit" name="unit">
+        {% for u in ["g", "kg", "mg", "t", "lb", "oz"] %}
+        <option value="{{ u }}" {{ 'selected' if (component.unit or 'g') == u }}>{{ u }}</option>
+        {% endfor %}
+      </select>
+    </div>
+    <div class="field">
+      <label for="description">Descriere</label>
+      <textarea id="description" name="description" rows="3" maxlength="500">{{ component.description or '' }}</textarea>
+    </div>
+    <label class="check">
+      <input type="checkbox" name="active" {{ 'checked' if component.active in [True, 1, '1', 'on', 'true'] or is_new }}>
+      Component activ
+    </label>
+
+    <div class="actions">
+      <button class="btn primary" type="submit">Salvează</button>
+      <a class="btn ghost" href="{{ url_for('components.index') }}">Renunță</a>
+    </div>
+  </form>
+</section>
+{% endblock %}