Update payroll cap to enhance staffing flexibility and adjust related documentation and tests

- Increased the `MonthlyPayrollCap` from 40,000 to 100,000, allowing for greater hiring capacity and subject assignments.
- Updated relevant documentation to reflect the new payroll cap and its implications for staffing.
- Adjusted tests to validate the new payroll cap and ensure proper functionality in staffing scenarios, including allocation and remaining payroll calculations.
- Enhanced styling in the UI to accommodate the changes in management screens.

src/HSchool.Client/src/style.css

@@ -63,8 +63,13 @@ body {
   justify-content: center;
 }
 
+/*
+ * No cap. A reading column has a sensible maximum width; a management screen does not — it is a
+ * tree, a table and a timetable grid, and every pixel taken away from them is a pixel of scrolling.
+ * The menu below keeps its column, because a row of cards centred on a wide display reads better.
+ */
 .screen.game {
-  max-width: 1500px;
+  max-width: none;
 }
 
 #status {
@@ -585,6 +590,27 @@ body {
   text-transform: uppercase;
 }
 
+/*
+ * Blocks on a card need a line between them, not just a caption: needs, family and the timetable
+ * ran together into one wall. The rule hangs off the caption rather than a wrapper because not
+ * every block has one — the timetable is a bare heading plus a grid.
+ *
+ * The faint hairlines inside a block (rows of a pair grid) stay lighter than this one on purpose:
+ * strong line means a new block, faint line means the next row.
+ */
+.people__card .people__section-title {
+  margin-top: 14px;
+  padding-top: 11px;
+  border-top: 1px solid var(--border);
+}
+
+/* The first block sits right under the name, where a divider would only add noise. */
+.people__card > .people__card-meta + .people__section > .people__section-title {
+  margin-top: 0;
+  padding-top: 0;
+  border-top: 0;
+}
+
 /*
  * Name on the left, value on the right, as many columns as the panel is wide. As a bulleted list
  * fourteen skills ran the card past the fold with three quarters of the width empty.