Fix garbled encoding symbols in oven display, bill/invoice tooltips, and profile timezone dropdown

- Replace mojibake × with × in oven batch cost row across Jobs Create/Edit/EditItems and Quotes Create/Edit
- Fix Qty × Unit Price tooltip in Bills/Edit and Invoices/Edit
- Fix all â€" (garbled em dash) and São Paulo in Profile timezone dropdown option labels

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/PowderCoating.Web/Views/Jobs/Edit.cshtml

@@ -26,7 +26,7 @@
                     <a tabindex="0" class="help-icon" role="button"
                        data-bs-toggle="popover" data-bs-placement="right" data-bs-trigger="focus"
                        data-bs-title="Job Details"
-                       data-bs-content="Core job information. Priority and due date are visible on the shop floor board and job list. Customer PO is the customer's own reference number — it appears on invoices. Special Instructions go directly to the shop floor worker on the work order.">
+                       data-bs-content="Core job information. Priority and due date are visible on the shop floor board and job list. Customer PO is the customer's own reference number — it appears on invoices. Special Instructions go directly to the shop floor worker on the work order.">
                         <i class="bi bi-question-circle"></i>
                     </a>
                 </div>
@@ -57,7 +57,7 @@
                             <a tabindex="0" class="help-icon" role="button"
                                data-bs-toggle="popover" data-bs-placement="right" data-bs-trigger="focus"
                                data-bs-title="Job Priority"
-                               data-bs-content="Controls sort order on the shop floor board and job list. Rush and Urgent jobs are highlighted in red/orange. Normal is the default. Raise priority only when the customer has an actual deadline constraint — overuse of Rush dilutes its meaning for the shop floor team.">
+                               data-bs-content="Controls sort order on the shop floor board and job list. Rush and Urgent jobs are highlighted in red/orange. Normal is the default. Raise priority only when the customer has an actual deadline constraint — overuse of Rush dilutes its meaning for the shop floor team.">
                                 <i class="bi bi-question-circle"></i>
                             </a>
                         </label>
@@ -85,7 +85,7 @@
                             <a tabindex="0" class="help-icon" role="button"
                                data-bs-toggle="popover" data-bs-placement="right" data-bs-trigger="focus"
                                data-bs-title="Due Date"
-                               data-bs-content="The customer's deadline — when the work must be ready for pickup or delivery. Overdue jobs (past due date and not yet completed) are highlighted in red on the job list.">
+                               data-bs-content="The customer's deadline — when the work must be ready for pickup or delivery. Overdue jobs (past due date and not yet completed) are highlighted in red on the job list.">
                                 <i class="bi bi-question-circle"></i>
                             </a>
                         </label>
@@ -170,7 +170,7 @@
                     <a tabindex="0" class="help-icon" role="button"
                        data-bs-toggle="popover" data-bs-placement="right" data-bs-trigger="focus"
                        data-bs-title="Job Items"
-                       data-bs-content="Each item represents a physical piece being coated. Use the wizard to pick from the catalog, enter custom dimensions, or upload a photo for AI analysis. Each item gets its own coating specification — color, powder, finish, and cure details. You can add multiple coating passes per item for multi-color or primer+topcoat work.">
+                       data-bs-content="Each item represents a physical piece being coated. Use the wizard to pick from the catalog, enter custom dimensions, or upload a photo for AI analysis. Each item gets its own coating specification — color, powder, finish, and cure details. You can add multiple coating passes per item for multi-color or primer+topcoat work.">
                         <i class="bi bi-question-circle"></i>
                     </a>
                 </div>
@@ -245,7 +245,7 @@
                     <p class="mb-1 text-muted small" id="pricingPlaceholder">Pricing will update automatically as you add items.</p>
                     <p class="mb-1 d-none" id="itemsSubtotalRow">Items Subtotal: <strong id="itemsSubtotalDisplay">$0.00</strong></p>
                     <p class="mb-1 d-none" id="ovenBatchCostRow">
-                        <i class="bi bi-fire me-1"></i>Oven (<span id="ovenBatchesDisplay">1</span> batch × <span id="ovenCycleMinDisplay">45</span> min):
+                        <i class="bi bi-fire me-1"></i>Oven (<span id="ovenBatchesDisplay">1</span> batch × <span id="ovenCycleMinDisplay">45</span> min):
                         <strong id="ovenBatchCostDisplay">$0.00</strong>
                     </p>
                     <p class="mb-1 text-success d-none" id="pricingTierDiscountRow">