refactor(engine): retire the dormant ECS/Entity runtime

CHANGELOG.md

@@ -36,6 +36,13 @@ for this cycle.
 - The unused engine-internal `Font.adjustFontSizeToFit(...)` (and its `PdfFont` /
   `WordFont` implementations) has been removed; text auto-sizing is resolved by the
   layout compiler.
+- The dormant Entity-Component-System engine internals have been removed: the
+  `EntityManager` / `SystemECS` runtime, the `Entity` component model with its
+  geometry / coordinator / renderable companions, the ECS render pipeline
+  (`engine.render.*` and the guide renderers under `engine.render.guides`), and
+  `LayoutSnapshotExtractor`. None were reachable from the live render path —
+  `DocumentSession` → layout compiler → fixed-layout backend — so document layout,
+  PDF output, and the public `guideLines(...)` overlay are unchanged.
 
 ### Public API
 

qa/src/test/resources/logback.xml

@@ -93,24 +93,8 @@
     </root>
 
     <!-- Layout / pagination tracing during tests -->
-    <logger name="com.demcha.compose.engine.pagination" level="DEBUG" additivity="false">
-        <appender-ref ref="LAYOUT_TRACE_FILE"/>
-    </logger>
-
     <logger name="com.demcha.compose.engine.layout.container" level="DEBUG" additivity="false">
         <appender-ref ref="LAYOUT_TRACE_FILE"/>
     </logger>
 
-    <logger name="com.demcha.compose.engine.components.core.Entity" level="DEBUG" additivity="false">
-        <appender-ref ref="LAYOUT_TRACE_FILE"/>
-    </logger>
-
-    <logger name="com.demcha.compose.engine.components.layout.coordinator" level="DEBUG" additivity="false">
-        <appender-ref ref="LAYOUT_TRACE_FILE"/>
-    </logger>
-
-    <logger name="com.demcha.compose.engine.render.guides" level="DEBUG" additivity="false">
-        <appender-ref ref="LAYOUT_TRACE_FILE"/>
-    </logger>
-
 </configuration>

src/main/java/com/demcha/compose/document/layout/ParagraphWrapping.java

@@ -7,7 +7,7 @@
 import com.demcha.compose.engine.components.content.text.TextDataBody;
 import com.demcha.compose.engine.components.content.text.TextIndentStrategy;
 import com.demcha.compose.engine.components.content.text.TextStyle;
-import com.demcha.compose.engine.components.renderable.BlockText;
+import com.demcha.compose.engine.text.TextControlSanitizer;
 import com.demcha.compose.engine.measurement.TextMeasurementSystem;
 import com.demcha.compose.engine.text.markdown.MarkDownParser;
 
@@ -560,7 +560,7 @@ private static List<List<InlineLayoutToken>> tokenizeInlineRuns(List<InlineRun>
                     continue;
                 }
                 TextStyle style = textRun.textStyle() == null ? defaultStyle : toTextStyle(textRun.textStyle());
-                String normalized = BlockText.sanitizeText(textRun.text().replace("\r\n", "\n").replace('\r', '\n'));
+                String normalized = TextControlSanitizer.remove(textRun.text().replace("\r\n", "\n").replace('\r', '\n'));
                 String[] parts = normalized.split("\n", -1);
                 for (int partIndex = 0; partIndex < parts.length; partIndex++) {
                     if (partIndex > 0) {
@@ -592,7 +592,7 @@ private static List<List<InlineLayoutToken>> tokenizeInlineRuns(List<InlineRun>
                 // run's outer edges — lead pad on the first word, trail pad on the
                 // last — and toInlineParagraphLine coalesces the same-group tokens on
                 // each visual line back into one rounded fill.
-                String normalized = BlockText.sanitizeText(
+                String normalized = TextControlSanitizer.remove(
                         highlight.text().replace("\r\n", " ").replace('\r', ' ').replace('\n', ' '));
                 if (normalized.isEmpty()) {
                     continue;

src/main/java/com/demcha/compose/document/layout/TextFlowSupport.java

@@ -8,7 +8,7 @@
 import com.demcha.compose.document.style.DocumentTextStyle;
 import com.demcha.compose.engine.components.content.text.TextIndentStrategy;
 import com.demcha.compose.engine.components.content.text.TextStyle;
-import com.demcha.compose.engine.components.renderable.BlockText;
+import com.demcha.compose.engine.text.TextControlSanitizer;
 import com.demcha.compose.engine.components.style.Padding;
 import com.demcha.compose.engine.measurement.TextMeasurementSystem;
 
@@ -736,7 +736,7 @@ private static List<String> sanitizeLogicalLines(String rawText) {
         String[] logicalLines = safeText.split("\n", -1);
         List<String> sanitized = new ArrayList<>(logicalLines.length);
         for (String logicalLine : logicalLines) {
-            sanitized.add(BlockText.sanitizeText(logicalLine));
+            sanitized.add(TextControlSanitizer.remove(logicalLine));
         }
         return List.copyOf(sanitized);
     }