Prefer stock display names in IPO reports

Request:
Rename the report display-name rule from 中文名 to 股票名, prefer Chinese stock-style short names, and allow sourced English stock names such as MERDEKAGOLD-DRS when no Chinese short name exists.

Changes:
- Update the hk-ipo-analyst skill to require a 股票名 column and document English stock-name fallback.
- Derive missing stock_short_name values from archived market-heat source-page stock names in the analysis dataset.
- Preserve source-page stock names into ipo_master when future market-heat archives encounter blank stock_short_name values.
- Rename the single-ticker report display helper to stock_display_name.
- Refresh the latest report and README so 06228 displays as MERDEKAGOLD-DRS and tables use 股票名.

Verification:
- python3 /root/.codex/skills/.system/skill-creator/scripts/quick_validate.py .agents/skills/hk-ipo-analyst
- git diff --check
- .venv/bin/python -m py_compile scripts/archive_t0_5_market_heat.py scripts/build_analysis_dataset.py scripts/generate_ipo_report.py
- Rebuilt analysis_model_v0_dataset.csv for 2026-06-23T10:59:36Z
- Verified 06228 stock_short_name is MERDEKAGOLD-DRS and latest README matches the dated report

scripts/generate_ipo_report.py

@@ -150,8 +150,8 @@ def fmt_int(value: int | None) -> str:
     return f"{value:,}"
 
 
-def chinese_display_name(record: dict[str, str]) -> str:
-    return record.get("stock_short_name") or record.get("company_name_zh") or ""
+def stock_display_name(record: dict[str, str]) -> str:
+    return record.get("stock_short_name") or record.get("company_name_zh") or record.get("company_name_en") or ""
 
 
 def company_display_name(record: dict[str, str]) -> str:
@@ -425,7 +425,7 @@ def build_report(record: dict[str, str], rows: list[dict[str, str]], stage: str,
     paths = source_paths(record, stage)
     source_lines = [f"- `{path}`" for path in paths] or ["- 本阶段没有记录来源路径。"]
     company_name = company_display_name(record)
-    title_name = chinese_display_name(record) or record.get("company_name_en") or ""
+    title_name = stock_display_name(record)
     title_prefix = f"{ticker} {title_name}" if title_name else ticker
 
     lines = [