[BUG] - Subtitles in visualization

[coltonbh]

With two ProgramOutputs and subtitles:

view.view(u2_energy, u3_energy, subtitles=["Visualization is Easy!", "Wow! Great Structure!"]) 

Error:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Cell In[24], line 1
----> 1 view.view(u2_energy, u3_energy, subtitles=["Visualization is Easy!", "Wow! Great Structure!"]) 

File [~/dev/personal/qcworkflow/.venv/lib/python3.13/site-packages/qcio/view.py:754](http://localhost:8888/home/cbh/dev/personal/qcworkflow/.venv/lib/python3.13/site-packages/qcio/view.py#line=753), in view(*objs, **kwargs)
    751     structures(*objs, **kwargs)  # type: ignore
    753 elif isinstance(obj, ProgramOutput):
--> 754     program_outputs(obj, **kwargs)
    756 else:
    757     raise NotImplementedError(f"Viewing of {type(obj)} is not implemented.")

File [~/dev/personal/qcworkflow/.venv/lib/python3.13/site-packages/qcio/view.py:690](http://localhost:8888/home/cbh/dev/personal/qcworkflow/.venv/lib/python3.13/site-packages/qcio/view.py#line=689), in program_outputs(animate, struct_viewer, conformer_rmsd_threshold, conformer_rmsd_kwargs, *prog_outputs, **kwargs)
    685     else:
    686         raise NotImplementedError(
    687             f"Viewing of {type(po.results)} is not yet implemented."
    688         )
--> 690     structure_html = generate_structure_viewer_html(
    691         for_viewer,
    692         titles_extra=[title_extra],
    693         **kwargs,
    694     )
    696 # Create results table or plot
    697 if isinstance(po.results, OptimizationResults):

File [~/dev/personal/qcworkflow/.venv/lib/python3.13/site-packages/qcio/view.py:158](http://localhost:8888/home/cbh/dev/personal/qcworkflow/.venv/lib/python3.13/site-packages/qcio/view.py#line=157), in generate_structure_viewer_html(width, height, titles, subtitles, titles_extra, subtitles_extra, distances, length_unit, style, show_indices, same_viewer, view_2d, interval, *structs)
    156     smiles = struct[0].ids.smiles
    157 else:
--> 158     name = struct.ids.name
    159     smiles = struct.ids.smiles
    161 title = f"{title or name or smiles or ''}"

AttributeError: 'NoneType' object has no attribute 'ids'