fix: dedupe generated material icon constants (#4765)

Agent-Logs-Url: https://github.com/codenameone/CodenameOne/sessions/3593e9e8-7f99-4e92-b224-3a3ed76e99cd

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: shai-almog <67850168+shai-almog@users.noreply.github.com>

Author: Copilot

.github/scripts/update_material_icons.py

@@ -62,6 +62,20 @@ def parse_codepoints(codepoints_text: str) -> list[tuple[str, str]]:
     return out
 
 
+def dedupe_entries(
+    entries: list[tuple[str, str]]
+) -> tuple[list[tuple[str, str]], list[tuple[str, str, str]]]:
+    deduped: dict[str, tuple[str, str]] = {}
+    duplicates: list[tuple[str, str, str]] = []
+    for icon_name, codepoint in entries:
+        const_name = material_constant_name(icon_name)
+        previous = deduped.get(const_name)
+        if previous is not None:
+            duplicates.append((const_name, previous[1].upper(), codepoint.upper()))
+        deduped[const_name] = (icon_name, codepoint)
+    return list(deduped.values()), duplicates
+
+
 def java_char_literal(codepoint: str) -> str | None:
     value = int(codepoint, 16)
     if value > MAX_JAVA_CHAR_CODEPOINT:
@@ -142,7 +156,17 @@ def main() -> int:
     remote_font = download_bytes(MATERIAL_FONT_URL)
     codepoints = download_text(MATERIAL_CODEPOINTS_URL)
     entries = parse_codepoints(codepoints)
+    entries, duplicates = dedupe_entries(entries)
     constants_block, skipped = generate_constants_block(entries)
+    if duplicates:
+        duplicate_names = ", ".join(
+            f"{const_name} (U+{old_codepoint} -> U+{new_codepoint})"
+            for const_name, old_codepoint, new_codepoint in duplicates
+        )
+        print(
+            "Deduplicating repeated Material icon constant names by keeping the last "
+            f"codepoint: {duplicate_names}"
+        )
     if skipped:
         skipped_names = ", ".join(
             f"{const_name} (U+{codepoint})" for const_name, codepoint in skipped