Add new component system for buttons, cards, and inputs

Integrates Django Cotton to replace existing UI components with a new templating system. Adds a test page to compare the new components against the old ones.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: dcfff319-6e91-4220-98a9-8295b87755b7
Replit-Commit-Checkpoint-Type: intermediate_checkpoint

backend/templates/cotton/input.html

@@ -0,0 +1,47 @@
+{% comment %}
+Input Component - Django Cotton Version of shadcn/ui Input
+Usage: <c-input type="text" placeholder="Enter text..." name="field_name" />
+Preserves EXACT same HTML output as the original include version
+{% endcomment %}
+
+<c-vars 
+    type="text"
+    name=""
+    id=""
+    placeholder=""
+    value=""
+    required=""
+    disabled=""
+    readonly=""
+    autocomplete=""
+    x_model=""
+    x_on=""
+    hx_get=""
+    hx_post=""
+    hx_target=""
+    hx_trigger=""
+    hx_swap=""
+    hx_include=""
+/>
+
+<input 
+  type="{{ type|default:'text' }}"
+  class="flex h-10 w-full rounded-md border border-input bg-background px-3 py-2 text-sm ring-offset-background file:border-0 file:bg-transparent file:text-sm file:font-medium placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50 {{ class|default:'' }}"
+  {% if name %}name="{{ name }}"{% endif %}
+  {% if id %}id="{{ id }}"{% endif %}
+  {% if placeholder %}placeholder="{{ placeholder }}"{% endif %}
+  {% if value %}value="{{ value }}"{% endif %}
+  {% if required %}required{% endif %}
+  {% if disabled %}disabled{% endif %}
+  {% if readonly %}readonly{% endif %}
+  {% if autocomplete %}autocomplete="{{ autocomplete }}"{% endif %}
+  {% if x_model %}x-model="{{ x_model }}"{% endif %}
+  {% if x_on %}{{ x_on }}{% endif %}
+  {% if hx_get %}hx-get="{{ hx_get }}"{% endif %}
+  {% if hx_post %}hx-post="{{ hx_post }}"{% endif %}
+  {% if hx_target %}hx-target="{{ hx_target }}"{% endif %}
+  {% if hx_trigger %}hx-trigger="{{ hx_trigger }}"{% endif %}
+  {% if hx_swap %}hx-swap="{{ hx_swap }}"{% endif %}
+  {% if hx_include %}hx-include="{{ hx_include }}"{% endif %}
+  {{ attrs }}
+/>