chore(style): codebase em-dash sweep + minor layout polish

Replaces every em-dash and en-dash with regular ASCII hyphens
across comments, JSX strings, and dev-facing logs. Mostly cosmetic
but stops the inconsistent mix that crept in over the last few
months (some files used em-dashes in comments, others didn't,
some used both).

Bundles two small dashboard-layout tweaks that touch a couple of
already-modified files:
- (dashboard)/layout.tsx main padding goes from p-6 to pt-3 px-6
  pb-6 so page content sits closer to the topbar.
- Sidebar now receives the ports list it needs for the footer
  port switcher.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/lib/services/invoices.ts

@@ -139,7 +139,7 @@ async function resolveBillingEntity(
  * Verify every supplied expense ID belongs to the caller's port. Without
  * this gate, a caller could link foreign-port expenses into their own
  * draft invoice and read those expenses back via getInvoiceById's
- * `linkedExpenses` join — a cross-tenant data leak.
+ * `linkedExpenses` join - a cross-tenant data leak.
  */
 async function assertExpensesInPort(
   tx: typeof db,
@@ -251,7 +251,7 @@ export async function createInvoice(portId: string, data: CreateInvoiceInput, me
     const lineItemsData = data.lineItems ?? [];
     const subtotal = lineItemsData.reduce((sum, li) => sum + (li.quantity ?? 1) * li.unitPrice, 0);
 
-    // BR-042: net10 discount — read from systemSettings
+    // BR-042: net10 discount - read from systemSettings
     let discountPct = 0;
     if (data.paymentTerms === 'net10') {
       const [setting] = await tx
@@ -479,7 +479,7 @@ export async function updateInvoice(
 
     // Replace expense links if provided
     if (data.expenseIds !== undefined) {
-      // Tenancy gate first — reject foreign-port expense IDs before
+      // Tenancy gate first - reject foreign-port expense IDs before
       // running BR-045 or doing any writes.
       await assertExpensesInPort(tx, portId, data.expenseIds);
       // BR-045
@@ -728,7 +728,7 @@ export async function recordPayment(
   });
 
   // Deposit invoices linked to a sales interest auto-advance the pipeline.
-  // Only advances forward — no-op if the interest has already moved past
+  // Only advances forward - no-op if the interest has already moved past
   // deposit_10pct (e.g. straight-to-contract flows).
   if (updated.kind === 'deposit' && updated.interestId) {
     const { advanceStageIfBehind } = await import('@/lib/services/interests.service');