updated slides template

packages/README.md

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+# Slides
+
+Compile `main.tex` with LuaLaTeX (and Biber for references).
+
+## Footer
+
+Set the names shown in the footer in the preamble:
+
+```latex
+\title[Short title]{Long title}
+\author[Short name]{Full author block}
+```
+
+1. The left zone holds about 70 pt of text and the middle zone about 280 pt. Longer text is scaled down.
+2. The middle zone shows the section and its dots from the first `\section` onwards. Above 20 frames in a section, the dots become a count such as `3/25`.
+3. Plain frames have no footer: the title page, section pages and `standout` frames.
+4. Compile twice after adding frames, so that the dots are complete.
+
+## Partner and funding logos
+
+Enable partners in the preamble, in the desired display order:
+
+```latex
+\partner{labsticc}\partner{ubo}\partner{aid}\partner{ifremer}
+```
+
+Logos for the following partners are included in `packages/partners/`:
+
+| Identifier | Partner |
+| --- | --- |
+| `labsticc` | Lab-STICC |
+| `ubo` | Université de Bretagne Occidentale |
+| `ensta` | ENSTA, Institut Polytechnique de Paris |
+| `aid` | Agence de l'innovation de défense |
+| `ifremer` | Ifremer |
+| `lip6` | Laboratoire d'informatique de Sorbonne Université |
+| `sorbonne` | Sorbonne Université |
+| `academia-sinica` | Academia Sinica |
+| `taipei` | University of Taipei |
+| `ubo-open-factory` | UBO Open Factory |
+
+For example, enable the additional four with:
+
+```latex
+\partner{lip6}\partner{sorbonne}\partner{academia-sinica}\partner{taipei}
+```
+
+Enable ENSTA with `\partner{ensta}`.
+
+Asset sources are recorded in [`partners/README.md`](partners/README.md).
+
+To add a logo to the bundled set, add it to `packages/partners/` in the template
+repository, named after its identifier (for example `packages/partners/my-funder.png`).
+In a project, leave `packages/` untouched and register the logo as shown below, so
+that it survives a template update.
+
+PNG, PDF, JPG and JPEG are supported, searched in that order. All ten bundled
+assets are transparent PNGs. Prefer high-resolution transparent PNGs or vector
+PDFs, tightly cropped to the artwork;
+embedded white space counts towards a logo's dimensions. SVGs should first be
+exported to PDF. The existing `img/logos.png` is a combined UBO/Lab-STICC image,
+not two independently selectable logos.
+
+For a project-specific logo, register a path (with or without its extension) and
+then enable the partner:
+
+```latex
+\declarepartner{my-funder}{img/custom-funder.pdf}
+\partner{my-funder}
+```
+
+The title page places the logos at the bottom right, inside the theme's margins.
+Column count, logo sizes, cell sizes, spacing and row wrapping are computed from
+the number of available logos, their aspect ratios, the column width and the
+slide height. Logos have equal bounding-box area for comparable visual weight:
+wide wordmarks are shorter than square seals, rather than dominating the block.
+Aspect ratios are preserved; logos are centred within evenly spaced grid cells.
+The final row is right-aligned and stays within a bounded title-page area.
+Repeated selections are ignored. Missing files produce warnings and are skipped,
+without inserting placeholder logos. Partners do not appear on ordinary slides.
+
+With no partners selected, the existing `\titlegraphic{...}` is still used.
+When partners are selected, they replace the legacy title graphic.
+
+### Additional information
+
+No additional logo files are needed for the ten included partners. If a funder
+requires a specific logo variant, minimum size, ordering or acknowledgement text,
+provide those project-specific requirements. No manual layout dimensions are needed.