Merge master: add cli_export, pdf_links; EDZ: 10-slot grid, group headers, ToS notice

- Resolve cmake/qet_compilation_vars.cmake conflict: keep both upstream's
  cli_export.cpp/h and pdf_links.cpp/h and the EDZ source additions.

- 10-position grid alignment: pin_y values are multiples of 10 so terminals
  snap cleanly to QET's default grid.  group_gap raised to 10 (one full slot).

- Named connector groups get a header label (group name) placed in the gap
  above the first pin, so the electrician sees block names (XDI, XPOW, …)
  without reading individual terminal designations.

- Device-tag dynamic_text now uses 9pt LABEL_FONT and y = min_y - 9 so it
  clears the element body and is legible at normal zoom.

- Add EPLAN Data Portal Terms of Use disclaimer to sources/import/edz/README.md.

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

sources/import/edz/README.md

@@ -44,6 +44,24 @@ used:
 The non-UI classes are deliberately decoupled from the widget so they can be
 tested headless.
 
+## Terms of Use / Legal notice
+
+The `.edz` files themselves are downloaded from the **EPLAN Data Portal**
+(data.eplan.com), which is operated by EPLAN Software & Service GmbH & Co. KG.
+The Data Portal Terms of Use (§ 5.4 at time of writing) restrict use of
+downloaded data to EPLAN products.
+
+**QElectroTech does not endorse or encourage violation of those terms.**
+Whether use of an `.edz` outside EPLAN products is permitted under your
+specific licence depends on the agreement you have with EPLAN and the
+individual manufacturer. You are solely responsible for ensuring that your use
+of `.edz` data complies with the applicable Terms of Use and any applicable
+law. If in doubt, contact EPLAN or the part manufacturer directly.
+
+QET's `.edz` reader parses only the portable, factual part data
+(pin designations, order numbers, manufacturer names). It does not reproduce
+any EPLAN-proprietary geometry or symbol data.
+
 ## Bundled LZMA SDK
 
 `lzma/` contains the decode-only subset of Igor Pavlov's **LZMA SDK** (public

sources/import/edz/edzelementbuilder.cpp

@@ -34,6 +34,8 @@ const QString FONT =
 	QStringLiteral("Liberation Sans,5,-1,5,50,0,0,0,0,0,Regular");
 const QString TITLE_FONT =
 	QStringLiteral("Liberation Sans,5,-1,5,75,0,0,0,0,0,Bold");
+const QString LABEL_FONT =
+	QStringLiteral("Liberation Sans,9,-1,5,50,0,0,0,0,0,Regular");
 
 QString uuidStr()
 {
@@ -71,19 +73,25 @@ QDomDocument EdzElementBuilder::build(const EdzPart &part)
 	}
 	const int n = pins.size();
 	const int pitch = 10;
-	const int group_gap = 5; // extra px inserted between designation groups
+	const int group_gap = 10; // one full slot between named connector groups
 
 	// Pins arrive sorted by functional group then by designation within each
 	// group (see EdzPart::parse).  A group break occurs when the
 	// functiondefinition block changes; fall back to designation comparison for
 	// parts that carry no functiondefinition information.
+	// No gap is inserted for power/busbar pins that carry no group label —
+	// they flow consecutively so a 3-phase AC source stays connected.
 	auto groupKey = [](const EdzPin &p) {
 		return p.group.isEmpty() ? p.designation : p.group;
 	};
 	QVector<bool> is_group_break(n, false);
 	for (int i = 1; i < n; ++i)
-		is_group_break[i] = (groupKey(pins.at(i)) != groupKey(pins.at(i - 1)));
+		is_group_break[i] = (groupKey(pins.at(i)) != groupKey(pins.at(i - 1)))
+		                    && (!pins.at(i).group.isEmpty());
 
+	// Place every terminal on a multiple-of-10 y coordinate so they align
+	// cleanly with QET's default grid.  The gap slot is also 10 px, giving
+	// one empty grid row between connector groups.
 	QVector<int> pin_y(n);
 	int cur_y = 0;
 	for (int i = 0; i < n; ++i) {
@@ -218,10 +226,23 @@ QDomDocument EdzElementBuilder::build(const EdzPart &part)
 		desc.appendChild(makeText(doc, 6, pin_y[i] + 2, label, FONT));
 	}
 
+	// Connector group header labels — one per named group, in the gap above
+	// the group's first pin so the electrician can see the terminal block name
+	// (e.g. "XDI", "XPOW") without having to read individual terminal names.
+	for (int i = 0; i < n; ++i) {
+		if (pins.at(i).group.isEmpty()) continue;
+		if (i > 0 && groupKey(pins.at(i)) == groupKey(pins.at(i - 1))) continue;
+		// Place the label centred in the gap slot above the group's first pin.
+		const int label_y = (i == 0) ? (pin_y[0] - group_gap / 2)
+		                              : (pin_y[i] - group_gap / 2);
+		desc.appendChild(makeText(doc, body_left + 2, label_y,
+		                          pins.at(i).group, FONT));
+	}
+
 	// Device-tag label (per-instance, above the body).
 	QDomElement dyn = doc.createElement(QStringLiteral("dynamic_text"));
 	dyn.setAttribute(QStringLiteral("x"), min_x + pad);
-	dyn.setAttribute(QStringLiteral("y"), min_y - 2);
+	dyn.setAttribute(QStringLiteral("y"), min_y - 9);
 	dyn.setAttribute(QStringLiteral("z"), QStringLiteral("5"));
 	dyn.setAttribute(QStringLiteral("text_width"), QStringLiteral("-1"));
 	dyn.setAttribute(QStringLiteral("Halignment"), QStringLiteral("AlignLeft"));
@@ -231,7 +252,7 @@ QDomDocument EdzElementBuilder::build(const EdzPart &part)
 	dyn.setAttribute(QStringLiteral("keep_visual_rotation"), QStringLiteral("false"));
 	dyn.setAttribute(QStringLiteral("text_from"), QStringLiteral("ElementInfo"));
 	dyn.setAttribute(QStringLiteral("uuid"), uuidStr());
-	dyn.setAttribute(QStringLiteral("font"), FONT);
+	dyn.setAttribute(QStringLiteral("font"), LABEL_FONT);
 	dyn.appendChild(doc.createElement(QStringLiteral("text")));
 	QDomElement info_name = doc.createElement(QStringLiteral("info_name"));
 	info_name.appendChild(doc.createTextNode(QStringLiteral("label")));