fix

app.py

@@ -227,7 +227,6 @@ def _apply_meeting_logo(OUTPUT_DIR: Path, meeting_logo_file, logs):
         return False
 
 def _apply_theme_rgb(OUTPUT_DIR: Path, rgb_tuple, logs):
-    """Update \\definecolor{<name>}{RGB}{r,g,b} or {HTML}{RRGGBB} in poster_output.tex."""
     if not rgb_tuple:
         return False
 
@@ -239,22 +238,27 @@ def _apply_theme_rgb(OUTPUT_DIR: Path, rgb_tuple, logs):
     try:
         content = tex_path.read_text(encoding="utf-8")
         r, g, b = rgb_tuple
-        # names we might use in template
         name_pattern = r"(?:nipspurple|neuripspurple|themecolor)"
 
-        # 1) Try RGB form
         rgb_pat = rf"(\\definecolor\{{{name_pattern}\}}\{{RGB\}}\{{)\s*\d+\s*,\s*\d+\s*,\s*\d+\s*(\}})"
-        new_content, n = re.subn(rgb_pat, rf"\1{r},{g},{b}\2", content, flags=re.MULTILINE)
+
+        def repl_rgb(m):
+            return f"{m.group(1)}{r},{g},{b}{m.group(2)}"
+
+        new_content, n = re.subn(rgb_pat, repl_rgb, content, flags=re.MULTILINE)
 
         if n == 0:
-            # 2) Try HTML form: \definecolor{name}{HTML}{5E2E91}
-            from_str = f"{r:02X}{g:02X}{b:02X}"
+            hexval = f"{r:02X}{g:02X}{b:02X}"
             html_pat = rf"(\\definecolor\{{{name_pattern}\}}\{{HTML\}}\{{)[0-9A-Fa-f]{{6}}(\}})"
-            new_content, n = re.subn(html_pat, rf"\1{from_str}\2", content, flags=re.MULTILINE)
+
+            def repl_html(m):
+                return f"{m.group(1)}{hexval}{m.group(2)}"
+
+            new_content, n = re.subn(html_pat, repl_html, content, flags=re.MULTILINE)
 
         if n > 0:
             tex_path.write_text(new_content, encoding="utf-8")
-            logs.append(f"🎨 Theme color updated to RGB {{{r},{g},{b}}} in {tex_path.relative_to(OUTPUT_DIR)}")
+            logs.append(f"🎨 Theme color updated to RGB {{{r},{g},{b}}}")
             return True
         else:
             logs.append("ℹ️ No \\definecolor target found.")
@@ -265,6 +269,7 @@ def _apply_theme_rgb(OUTPUT_DIR: Path, rgb_tuple, logs):
         return False
 
 
+
 def _apply_left_logo(OUTPUT_DIR: Path, logo_files, logs):
     """
     Use the first institutional logo uploaded by the user:
@@ -557,7 +562,7 @@ def run_pipeline(arxiv_url, pdf_file, openai_key, logo_files, meeting_logo_file,
 
     except Exception as e:
         logs.append(f"❌ Failed to create zip: {e}")
-        
+
     # ====== Prepare Overleaf base64 payload (optional) ======
     overleaf_zip_b64 = ""
     try:

posterbuilder/convert.py

@@ -517,6 +517,27 @@ def figures_to_latex(fig_list, out_tex_path: pathlib.Path, images_parent: pathli
         )
     return "\n".join(chunks)
 
+
+def strip_stray_t(tex: str) -> str:
+    _T_ALLOWED_PREFIXES = (
+    # 常见 text 系
+    "ext", "extbf", "extit", "exttt", "extsc", "extsf",
+    "extcolor", "extsuperscript", "extsubscript",
+    "extwidth", "extheight",
+    # beamer/tikz 等
+    "itle", "hanks", "ikz", "ikzpicture", "ikzset", "ikzstyle",
+    # 表格/书签等
+    "ab", "abular", "able", "abularx", "abcolsep",
+    # 其他常见
+    "iny", "ttfamily", "oday", "he", "ypeout",
+    "oprule", "midrule", "bottomrule",  # booktabs
+    "ocs", "ocsection", "ocsubsection"
+    )
+    _T_NONCOMMAND_RE = re.compile(
+        r'\\([tT])(?!(' + '|'.join(_T_ALLOWED_PREFIXES) + r')|\{)'
+    )
+    return _T_NONCOMMAND_RE.sub(lambda m: m.group(1), tex)
+
 # ===================== 主流程 =====================
 def build():
     OUTPUT_DIR.mkdir(parents=True, exist_ok=True)
@@ -562,7 +583,8 @@ def build():
     # 注意：要先处理上面的大括号再处理反斜杠，否则会提前破坏结构
     cleaned_tex = cleaned_tex.replace(r"\\\\", r"\\")  # 避免双转义干扰
     cleaned_tex = cleaned_tex.replace(r"\\", "\\")      # 最终将 \\ → \
-    cleaned_tex = cleaned_tex.replace(r"\t\t", "\\t")    
+    cleaned_tex = cleaned_tex.replace(r"\t\t", "\\t")
+    cleaned_tex = strip_stray_t(cleaned_tex)
 
     OUTPUT_PATH.write_text(cleaned_tex, encoding="utf-8")
     print(f"✅ Wrote: {OUTPUT_PATH.relative_to(ROOT_DIR)}")