feat: add checkboxes and update webhook for business wizard

- Add 3 checkboxes between textareas and submit button:
  - I already have a homepage (bizHasHomepage)
  - I already use ODOO (bizUsesOdoo)
  - I already have a developer for modules (bizHasDeveloper)
- POST to /webhook/report instead of old webhook UUID
- Include checkbox boolean values in request body
- Add .biz-checkbox-group and .biz-checkbox CSS (inline + external)

index.html

@@ -86,6 +86,10 @@
       .biz-field textarea:focus{border-color:var(--brass);background:rgba(255,255,255,.08)}
       .biz-field textarea::placeholder{color:rgba(255,255,255,.3)}
       .biz-form .btn-lg{margin-top:.5rem;width:100%}
+      .biz-checkbox-group{display:flex;flex-direction:column;gap:.6rem;margin-bottom:1rem}
+      .biz-checkbox{display:flex;align-items:center;gap:.6rem;font-family:Inter,sans-serif;font-size:.85rem;color:rgba(255,255,255,.75);cursor:pointer;user-select:none;transition:color .2s}
+      .biz-checkbox:hover{color:#fff}
+      .biz-checkbox input[type="checkbox"]{width:1.05rem;height:1.05rem;accent-color:var(--brass);cursor:pointer;flex-shrink:0}
       .biz-success{margin-top:1.5rem}.biz-success i{font-size:2.5rem;color:var(--success);margin-bottom:.75rem}
       .biz-success h3{color:#fff;margin-bottom:.5rem}.biz-success p{color:rgba(255,255,255,.65);font-size:.95rem;max-width:480px;margin:0 auto 1.25rem;line-height:1.7}
     </style>
@@ -404,6 +408,11 @@
             <label for="bizChallenges">Current Challenges</label>
             <textarea id="bizChallenges" placeholder="What problems are you facing? Manual processes, data silos, growth pains, lack of visibility..." required></textarea>
           </div>
+          <div class="biz-checkbox-group">
+            <label class="biz-checkbox"><input type="checkbox" id="bizHasHomepage" /> I already have a homepage</label>
+            <label class="biz-checkbox"><input type="checkbox" id="bizUsesOdoo" /> I already use ODOO</label>
+            <label class="biz-checkbox"><input type="checkbox" id="bizHasDeveloper" /> I already have a developer for modules</label>
+          </div>
           <button type="submit" class="btn btn-brass btn-lg" id="bizSubmitBtn">Generate My Project Plan &rarr;</button>
         </form>
         <div class="biz-success" id="bizSuccess" style="display:none">