PR U-12: report primitives + print CSS

Extract ReportHeader, ReportDivider, ReportSectionHeader, and
ReportFooter under Components/Pages/Reports/ and adopt them across
BalanceReport, BalanceSheetReport, ProfitLossReport, and DetailReport.
Row shapes are unchanged; the primitives just fold the divider hr
rows (30+ occurrences), section headers (8), and header/footer (4
each). ProfitLossReport / DetailReport also drop leftover
`m.Class == 3/4` magic numbers for ClassIds. Print CSS gains
`table.report tr { page-break-inside: avoid; }` so section headers
don't land at the bottom of a page alone. Net -88 lines across the
four report razor files.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Schaad.Accounting.UI/Components/Pages/Reports/BalanceReport.razor

@@ -1,4 +1,4 @@
-@page "/BalanceReport"
+@page "/BalanceReport"
 
 @if (balance is null)
 {
@@ -6,11 +6,8 @@
     return;
 }
 
-<h3>@header</h3>
+<ReportHeader Title="@header"/>
-<a href="javascript:window.print()" class="hidePrint">Print</a>
 
-<br />
-<br />
 <table class="report">
     <thead>
         <tr>
@@ -20,16 +17,11 @@
             <th class="right">Passiven</th>
         </tr>
         <tr>
-            <th colspan="4"><hr /></th>
+            <th colspan="4"><hr/></th>
         </tr>
     </thead>
     <tbody>
-        <tr>
+        <ReportSectionHeader Title="Aktiven" Colspan="4"/>
-            <td colspan="4" class="header">Aktiven</td>
-        </tr>
-        <tr>
-            <td colspan="4"><hr /></td>
-        </tr>
         @foreach (var account in balance.ActivaAccountList.OrderBy(m => m.Number))
         {
             @if (account.BalanceCHF == 0) { continue; }
@@ -41,23 +33,14 @@
                 <td></td>
             </tr>
         }
-        <tr>
+        <ReportDivider Colspan="4"/>
-            <td colspan="4"><hr /></td>
-        </tr>
         <tr>
             <td colspan="2" class="total">Total Aktiven</td>
             <td class="right total">CHF @balance.TotalActivaCHF.ToFormattedString()</td>
             <td></td>
         </tr>
-        <tr>
+        <ReportDivider Colspan="4"/>
-            <td colspan="4"><hr /></td>
+        <ReportSectionHeader Title="Passiven" Colspan="4"/>
-        </tr>
-        <tr>
-            <td colspan="4" class="header">Passiven</td>
-        </tr>
-        <tr>
-            <td colspan="4"><hr /></td>
-        </tr>
         @foreach (var account in balance.PassivaAccountList.OrderBy(m => m.Number))
         {
             @if (account.BalanceCHF == 0) { continue; }
@@ -69,17 +52,13 @@
                 <td class="right">@Math.Abs(account.BalanceCHF).ToFormattedString()</td>
             </tr>
         }
-        <tr>
+        <ReportDivider Colspan="4"/>
-            <td colspan="4"><hr /></td>
-        </tr>
         <tr>
             <td colspan="2" class="total">Total Passiven</td>
             <td></td>
             <td class="right total">@balance.TotalPassivaCHF.ToFormattedString()</td>
         </tr>
-        <tr>
+        <ReportDivider Colspan="4"/>
-            <td colspan="4"><hr /></td>
-        </tr>
         <tr>
             <td colspan="2" class="total">Total</td>
             <td class="right">@balance.TotalActivaCHF.ToFormattedString()</td>
@@ -95,11 +74,6 @@
             <td class="right total sum">CHF @balance.TotalActivaCHF.ToFormattedString()</td>
             <td class="right total sum">CHF @((balance.TotalPassivaCHF + win).ToFormattedString())</td>
         </tr>
-        <tr>
+        <ReportFooter Footer="@footer" Colspan="4"/>
-            <td colspan="4" style="height: 30px">&nbsp;</td>
-        </tr>
-        <tr>
-            <td colspan="4" class="footer">@footer</td>
-        </tr>
     </tbody>
 </table>

Schaad.Accounting.UI/Components/Pages/Reports/BalanceSheetReport.razor

@@ -1,4 +1,4 @@
-@page "/BalanceSheetReport"
+@page "/BalanceSheetReport"
 
 @if (balanceSheet is null)
 {
@@ -6,18 +6,11 @@
     return;
 }
 
-<h3>@header</h3>
+<ReportHeader Title="@header"/>
-<a href="javascript:window.print()" class="hidePrint">Print</a>
+
-<br />
-<br />
 <table class="report">
     <tbody>
-        <tr>
+        <ReportSectionHeader Title="Einnahmen" Colspan="3"/>
-            <td colspan="3" class="header">Einnahmen</td>
-        </tr>
-        <tr>
-            <td colspan="3"><hr /></td>
-        </tr>
         @foreach (var account in balanceSheet.ActivaAccountList.OrderBy(m => m.Number))
         {
             @if (account.StartBalanceCHF == 0) { continue; }
@@ -38,15 +31,8 @@
                 <td class="right">@Math.Abs(account.BalanceCHF).ToFormattedString()</td>
             </tr>
         }
-        <tr>
+        <ReportDivider Colspan="3"/>
-            <td colspan="3"><hr /></td>
+        <ReportSectionHeader Title="Ausgaben" Colspan="3"/>
-        </tr>
-        <tr>
-            <td colspan="3" class="header">Ausgaben</td>
-        </tr>
-        <tr>
-            <td colspan="3"><hr /></td>
-        </tr>
         @foreach (var account in balanceSheet.ExpensesAccountList.OrderBy(m => m.Number))
         {
             @if (account.BalanceCHF == 0) { continue; }
@@ -57,9 +43,7 @@
                 <td class="right">@account.BalanceCHF.ToFormattedString()</td>
             </tr>
         }
-        <tr>
+        <ReportDivider Colspan="3"/>
-            <td colspan="3"><hr /></td>
-        </tr>
         <tr>
             <td colspan="2">Total Einnahmen</td>
             <td class="right">@balanceSheet.ProfitCHF.ToFormattedString()</td>
@@ -72,11 +56,6 @@
             <td colspan="2" class="total">Übertrag @(balanceSheet.Year + 1)</td>
             <td class="right total sum">CHF @win.ToFormattedString()</td>
         </tr>
-        <tr>
+        <ReportFooter Footer="@footer"/>
-            <td colspan="4" style="height: 30px">&nbsp;</td>
-        </tr>
-        <tr>
-            <td colspan="4" class="footer">@footer</td>
-        </tr>
     </tbody>
 </table>

Schaad.Accounting.UI/Components/Pages/Reports/DetailReport.razor

@@ -1,4 +1,4 @@
-@page "/DetailReport"
+@page "/DetailReport"
 
 @if (accounts is null || transactions is null)
 {
@@ -6,11 +6,8 @@
     return;
 }
 
-<h3>@header</h3>
+<ReportHeader Title="@header"/>
-<a href="javascript:window.print()" class="hidePrint">Print</a>
 
-<br />
-<br />
 <table class="report">
     <thead>
         <tr>
@@ -19,19 +16,14 @@
             <th class="right">Betrag</th>
         </tr>
         <tr>
-            <th colspan="3"><hr /></th>
+            <th colspan="3"><hr/></th>
         </tr>
     </thead>
     <tbody>
-    <tr>
+        <ReportSectionHeader Title="Einkünfte" Colspan="3"/>
-        <td colspan="3" class="header">Einkünfte</td>
+        @foreach (var account in accounts.Where(m => m.Class == ClassIds.Income).OrderBy(m => m.Number))
-    </tr>
+        {
-    <tr>
+            @if (account.Balance == 0) { continue; }
-        <td colspan="3"><hr /></td>
-    </tr>
-@foreach(var account in accounts.Where(m => m.Class == 3).OrderBy(m => m.Number))
-{
-    @if (account.Balance == 0) {continue;}
 
             <tr>
                 <td class="header">@account.Number</td>
@@ -39,7 +31,7 @@
                 <td class="header right">@Math.Abs(account.Balance).ToFormattedString()</td>
             </tr>
 
-        @foreach(var trx in transactions.Where(t => t.TargetAccountId == account.Id || t.OriginAccountId == account.Id).OrderBy(t => t.ValueDate))
+            @foreach (var trx in transactions.Where(t => t.TargetAccountId == account.Id || t.OriginAccountId == account.Id).OrderBy(t => t.ValueDate))
             {
                 <tr>
                     <td>@trx.ValueDate.ToString("dd.MM.yyyy")</td>
@@ -51,31 +43,23 @@
                         }
                         else
                         {
-                        <span>-</span>@trx.Value.ToFormattedString();
+                            <span>-</span>
+                            @trx.Value.ToFormattedString();
                         }
                     </td>
                 </tr>
             }
-        <tr>
+            <ReportDivider Colspan="3"/>
-            <td colspan="3"><hr /></td>
+        }
-        </tr>
-}
         <tr>
             <td colspan="2" class="total right">Total Einkünfte</td>
             <td class="right total">@profit.ToFormattedString()</td>
         </tr>
-    <tr>
+        <ReportDivider Colspan="3"/>
-        <td colspan="3"><hr /></td>
+        <ReportSectionHeader Title="Ausgaben" Colspan="3"/>
-    </tr>
+        @foreach (var account in accounts.Where(m => m.Class == ClassIds.Expenses).OrderBy(m => m.Number))
-    <tr>
+        {
-        <td colspan="3" class="header">Ausgaben</td>
+            @if (account.Balance == 0) { continue; }
-    </tr>
-    <tr>
-        <td colspan="3"><hr /></td>
-    </tr>
-@foreach(var account in accounts.Where(m => m.Class == 4).OrderBy(m => m.Number))
-{
-    @if (account.Balance == 0) {continue;}
 
             <tr>
                 <td class="header">@account.Number</td>
@@ -83,7 +67,7 @@
                 <td class="header right">@account.Balance.ToFormattedString()</td>
             </tr>
 
-    @foreach(var trx in transactions.Where(t => t.TargetAccountId == account.Id || t.OriginAccountId == account.Id).OrderBy(t => t.ValueDate))
+            @foreach (var trx in transactions.Where(t => t.TargetAccountId == account.Id || t.OriginAccountId == account.Id).OrderBy(t => t.ValueDate))
             {
                 <tr>
                     <td>@trx.ValueDate.ToString("dd.MM.yyyy")</td>
@@ -95,24 +79,18 @@
                         }
                         else
                         {
-                        <span>-</span>@trx.Value.ToFormattedString();
+                            <span>-</span>
+                            @trx.Value.ToFormattedString();
                         }
                     </td>
                 </tr>
             }
-        <tr>
+            <ReportDivider Colspan="3"/>
-            <td colspan="3"><hr /></td>
+        }
-        </tr>
-}
         <tr>
             <td colspan="2" class="total right">Total Ausgaben</td>
             <td class="right total">@loss.ToFormattedString()</td>
         </tr>
-    <tr>
+        <ReportFooter Footer="@footer"/>
-        <td colspan="4" style="height: 30px">&nbsp;</td>
-    </tr>
-    <tr>
-        <td colspan="4" class="footer">@footer</td>
-    </tr>
     </tbody>
 </table>

Schaad.Accounting.UI/Components/Pages/Reports/ProfitLossReport.razor

@@ -1,4 +1,4 @@
-@page "/ProfitLossReport"
+@page "/ProfitLossReport"
 
 @if (accounts is null)
 {
@@ -6,11 +6,8 @@
     return;
 }
 
-<h3>@header</h3>
+<ReportHeader Title="@header"/>
-<a href="javascript:window.print()" class="hidePrint">Print</a>
 
-<br />
-<br />
 <table class="report">
     <thead>
         <tr>
@@ -20,19 +17,14 @@
             <th class="right">Ertrag</th>
         </tr>
         <tr>
-            <th colspan="4"><hr /></th>
+            <th colspan="4"><hr/></th>
         </tr>
     </thead>
     <tbody>
-    <tr>
+        <ReportSectionHeader Title="Einkünfte" Colspan="4"/>
-        <td colspan="4" class="header">Einkünfte</td>
+        @foreach (var account in accounts.Where(m => m.Class == ClassIds.Income).OrderBy(m => m.Number))
-    </tr>
+        {
-    <tr>
+            @if (account.Balance == 0) { continue; }
-        <td colspan="4"><hr /></td>
-    </tr>
-@foreach(var account in accounts.Where(m => m.Class == 3).OrderBy(m => m.Number))
-{
-    @if (account.Balance == 0) {continue;}
 
             <tr>
                 <td>@account.Number</td>
@@ -40,27 +32,18 @@
                 <td></td>
                 <td class="right">@Math.Abs(account.Balance).ToFormattedString()</td>
             </tr>
-}
+        }
-    <tr>
+        <ReportDivider Colspan="4"/>
-        <td colspan="4"><hr /></td>
-    </tr>
         <tr>
             <td colspan="2" class="total">Total Einkünfte</td>
             <td></td>
             <td class="right total">@profit.ToFormattedString()</td>
         </tr>
-    <tr>
+        <ReportDivider Colspan="4"/>
-        <td colspan="4"><hr /></td>
+        <ReportSectionHeader Title="Ausgaben" Colspan="4"/>
-    </tr>
+        @foreach (var account in accounts.Where(m => m.Class == ClassIds.Expenses).OrderBy(m => m.Number))
-    <tr>
+        {
-        <td colspan="4" class="header">Ausgaben</td>
+            @if (account.Balance == 0) { continue; }
-    </tr>
-    <tr>
-        <td colspan="4"><hr /></td>
-    </tr>
-@foreach(var account in accounts.Where(m => m.Class == 4).OrderBy(m => m.Number))
-{
-    @if (account.Balance == 0) {continue;}
 
             <tr>
                 <td>@account.Number</td>
@@ -68,18 +51,14 @@
                 <td class="right">@Math.Abs(account.Balance).ToFormattedString()</td>
                 <td></td>
             </tr>
-}
+        }
-    <tr>
+        <ReportDivider Colspan="4"/>
-        <td colspan="4"><hr /></td>
-    </tr>
         <tr>
             <td colspan="2" class="total">Total Ausgaben</td>
             <td class="right total">@loss.ToFormattedString()</td>
             <td></td>
         </tr>
-    <tr>
+        <ReportDivider Colspan="4"/>
-        <td colspan="4"><hr /></td>
-    </tr>
         <tr>
             <td colspan="2" class="total"></td>
             <td class="right total">@loss.ToFormattedString()</td>
@@ -95,11 +74,6 @@
             <td class="right total sum">@profit.ToFormattedString()</td>
             <td class="right total sum">@profit.ToFormattedString()</td>
         </tr>
-    <tr>
+        <ReportFooter Footer="@footer" Colspan="4"/>
-        <td colspan="4" style="height: 30px">&nbsp;</td>
-    </tr>
-    <tr>
-        <td colspan="4" class="footer">@footer</td>
-    </tr>
     </tbody>
 </table>

Schaad.Accounting.UI/Components/Pages/Reports/ReportDivider.razor

@@ -0,0 +1,11 @@
+@* Full-width table divider — <tr><td colspan="N"><hr/></td></tr>.
+   Callers pass their table's column count. *@
+
+<tr>
+    <td colspan="@Colspan"><hr/></td>
+</tr>
+
+@code {
+    [Parameter, EditorRequired]
+    public int Colspan { get; set; }
+}

Schaad.Accounting.UI/Components/Pages/Reports/ReportFooter.razor

@@ -0,0 +1,19 @@
+@* Report tail — spacer row + italic footer line ("Stand: dd.MM.yyyy").
+   Note: the existing code used colspan="4" here even in reports whose
+   table only has 3 columns; preserved as-is so the visual is unchanged.
+   Callers can override via the Colspan parameter. *@
+
+<tr>
+    <td colspan="@Colspan" style="height: 30px">&nbsp;</td>
+</tr>
+<tr>
+    <td colspan="@Colspan" class="footer">@Footer</td>
+</tr>
+
+@code {
+    [Parameter, EditorRequired]
+    public string Footer { get; set; } = "";
+
+    [Parameter]
+    public int Colspan { get; set; } = 4;
+}

Schaad.Accounting.UI/Components/Pages/Reports/ReportHeader.razor

@@ -0,0 +1,14 @@
+@* Shared banner used at the top of every printable report.
+   H3 + browser print trigger + spacer. The Print link is hidden in the
+   print stylesheet via .hidePrint. *@
+
+<h3>@Title</h3>
+<a href="javascript:window.print()" class="hidePrint">Print</a>
+
+<br/>
+<br/>
+
+@code {
+    [Parameter, EditorRequired]
+    public string Title { get; set; } = "";
+}

Schaad.Accounting.UI/Components/Pages/Reports/ReportSectionHeader.razor

@@ -0,0 +1,18 @@
+@* Section header + divider pair — "Aktiven", "Passiven", "Einkünfte",
+   "Ausgaben", "Einnahmen" etc. Wraps two <tr>s so the caller drops it
+   into <tbody> as a single element. *@
+
+<tr>
+    <td colspan="@Colspan" class="header">@Title</td>
+</tr>
+<tr>
+    <td colspan="@Colspan"><hr/></td>
+</tr>
+
+@code {
+    [Parameter, EditorRequired]
+    public string Title { get; set; } = "";
+
+    [Parameter, EditorRequired]
+    public int Colspan { get; set; }
+}

Schaad.Accounting.UI/wwwroot/app.css

@@ -63,6 +63,13 @@ h1:focus {
     .hidePrint {
         display: none !important;
     }
+
+    /* Keep report rows intact across page breaks. Without this a row could
+       be split by the printer between an amount and its label, or between a
+       section header and its first data row. */
+    table.report tr {
+        page-break-inside: avoid;
+    }
 }
 
 table.report