Add automatic slide partner logos and refresh LaTeX devcontainer

Slides/img/partners/README.md

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+# Partner logo sources
+
+Downloaded from official institutional websites on 2026-10-11. Logos remain the
+property of their respective institutions; availability here does not grant
+unrestricted use or imply endorsement. Follow the applicable branding rules.
+
+| File | Official asset source |
+| --- | --- |
+| `labsticc.png` | [IMT Atlantique / Lab-STICC](https://www.imt-atlantique.fr/sites/default/files/users/user1867/logo-lab-sticc.png) |
+| `ubo.png` | Official inline SVG labelled `Logo UBO` on [UBO's branding page](https://www.univ-brest.fr/fr/page/charte-graphique-ubo-et-logos-disposition-des-partenaires), rendered to a transparent 3,161 × 1,299 PNG at 600 DPI |
+| `ensta.png` | Official blue vertical ENSTA / IP Paris transparent PNG (`Ensta-logotype-05-bleu-rvb.png`) from the [ENSTA RGB logo archive](https://www.ensta.fr/sites/default/files/content/article/pdf/LogoENSTA_RVB.zip), linked from [ENSTA's branding page](https://www.ensta.fr/logo-et-charte-graphique); cropped to 3,638 × 2,286 pixels |
+| `aid.png` | [Ministère des Armées / AID](https://www.defense.gouv.fr/sites/default/files/aid/logo.png), displayed on [AID's RAPID page](https://www.defense.gouv.fr/aid/deposez-votre-projet/rapid-regime-dappui-linnovation-duale) |
+| `ifremer.png` | Inline `logo-ifremer` SVG from [Ifremer](https://www.ifremer.fr/fr); rendered using the site's brand colour `#0032c6` |
+| `lip6.png` | Inline `LIP6` SVG from [LIP6](https://www.lip6.fr/); rendered using `--LIP6_logo_color: #25314F` from the site's `css/common.css` |
+| `sorbonne.png` | [Sorbonne Université SVG](https://www.sorbonne-universite.fr/sites/default/files/media/2019-10/logo_4.svg), rendered to PNG |
+| `academia-sinica.png` | [Academia Sinica](https://www.sinica.edu.tw/images/AS_logo_2.png), referenced by its [official website](https://www.sinica.edu.tw/en) |
+| `taipei.png` | [University of Taipei masthead](https://www.utaipei.edu.tw/var/file/0/1000/img/1583/366369593.jpg), linked from its [official website](https://www.utaipei.edu.tw/) |
+
+All nine files are tightly cropped RGBA PNGs with actual transparent pixels,
+not just an alpha channel containing an opaque white background. Existing alpha
+was preserved. For opaque sources, only white background connected to the outer
+edge was removed; white artwork inside the Academia Sinica seal was retained,
+and antialiased contour pixels were unmatted to avoid white fringes.
+
+The SVG-derived assets were rendered at high resolution (at least 1,900 pixels
+wide). UBO was re-rendered from vector paths, not upscaled from the old 489-pixel
+PNG; its SVG viewport was extended to preserve the descender in “Bretagne”.
+LIP6's white circular website backdrop was omitted, keeping the plain
+logotype; glyph paths, proportions and lettering were not changed. Compilation
+needs no SVG converter, network access or additional shell commands.