web: add DRC viewer widget

Add a DRC (Design Rule Check) viewer to the web UI with:
- Server-side handlers for categories, markers, report loading,
  marker updates, and violation highlighting
- Client-side DRC widget with category selector, violation tree,
  load/highlight, and file upload dialog
- DRC overlay rendering in the tile generator
- C++ and JS tests for the new functionality

Signed-off-by: Matt Liberty <mliberty@precisioninno.com>

Author: maliberty

src/web/.gitignore

@@ -1,4 +1,6 @@
 *~
 test/results
 test/node_modules
+node_modules
+package-lock.json
 TAGS

src/web/BUILD

@@ -38,6 +38,7 @@ genrule(
         "src/schematic-widget.js",
         "src/charts-widget.js",
         "src/timing-widget.js",
+        "src/drc-widget.js",
         "src/main.js",
     ],
     outs = ["src/report_assets.cpp"],
@@ -61,6 +62,7 @@ genrule(
           " $(location src/schematic-widget.js)" +
           " $(location src/charts-widget.js)" +
           " $(location src/timing-widget.js)" +
+          " $(location src/drc-widget.js)" +
           " $(location src/main.js)",
     tools = [":embed_report_assets"],
 )

src/web/CMakeLists.txt

@@ -35,6 +35,7 @@ add_custom_command(
         ${CMAKE_CURRENT_SOURCE_DIR}/src/schematic-widget.js
         ${CMAKE_CURRENT_SOURCE_DIR}/src/charts-widget.js
         ${CMAKE_CURRENT_SOURCE_DIR}/src/timing-widget.js
+        ${CMAKE_CURRENT_SOURCE_DIR}/src/drc-widget.js
         ${CMAKE_CURRENT_SOURCE_DIR}/src/main.js
   DEPENDS
     src/embed_report_assets.py
@@ -56,6 +57,7 @@ add_custom_command(
     src/schematic-widget.js
     src/charts-widget.js
     src/timing-widget.js
+    src/drc-widget.js
     src/main.js
   COMMENT "Generating report_assets.cpp"
 )

src/web/package.json

@@ -0,0 +1,5 @@
+{
+  "dependencies": {
+    "jsdom": "^29.0.2"
+  }
+}