Add xref support, assembly/component views, and import tooling

- add_xref.php, edit_xref.php: xref record add/edit for stock content types
- admin xref group/source pages for stock_assembly and stock_component
- assembly_views/: auto_flow, fixed_grid, position_number, simple_list layouts
- Full assembly and component listing, tree, ordering, and detail pages
- Import tooling (ImportAssembly, ImportComponent, load scripts)
- liberty_plugins for assembly and component data types
- schema_inc.php updated; StockAssembly, StockBase, StockComponent,
  StockMovement classes updated with xref group/item/multiple renames
- Templates updated throughout for xref rename (source→item, group→x_group)

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

1 files changed, 44 insertions, 0 deletions

diff --git a/templates/add_xref.tpl b/templates/add_xref.tpl
new file mode 100644
index 0000000..63166cb
--- /dev/null
+++ b/templates/add_xref.tpl
@@ -0,0 +1,44 @@
+{strip}
+<div class="edit stock">
+	<div class="header">
+		<h1>{tr}Add Detail{/tr}: {$gContent->getTitle()|escape}</h1>
+	</div>
+
+	<div class="body">
+		{formfeedback error=$errors}
+
+		{form id="addStockXrefForm"}
+			<input type="hidden" name="content_id" value="{$gContent->mContentId}" />
+			<input type="hidden" name="group"  value="{$group}" />
+
+			<div class="form-group">
+				{formlabel label="Type" for="item"}
+				{forminput}
+					{html_options name="item" id="item" options=$xrefTypeList.list}
+				{/forminput}
+			</div>
+
+			<div class="form-group">
+				{formlabel label="Value" for="edit"}
+				{forminput}
+					<input type="text" class="form-control" name="edit" id="edit" value="" />
+					{formhelp note="Enter the value for this detail record."}
+				{/forminput}
+			</div>
+
+			<div class="form-group">
+				{formlabel label="Linked Content ID" for="xref"}
+				{forminput}
+					<input type="text" class="form-control input-small" name="xref" id="xref" value="" />
+					{formhelp note="For supplier links: enter the contact content_id. Leave blank for all other types."}
+				{/forminput}
+			</div>
+
+			<div class="form-group submit">
+				<input type="submit" class="btn btn-default" name="fCancel" value="{tr}Cancel{/tr}" />
+				<input type="submit" class="btn btn-primary" name="fAddXref" value="{tr}Save{/tr}" />
+			</div>
+		{/form}
+	</div><!-- end .body -->
+</div><!-- end .stock -->
+{/strip}