Repair two lecture 14 figures and sync the book copies

Re-render the Wordsworth & Kreidberg (2022) circulation schematic at 400 dpi from the figure PDF in the arXiv source at 2424x1458, replacing a 1259x792 raster that the full-page title slide upscaled by 1.36; the deck title background and the closing slide show the same image and are updated with it. Trim the Lichtenberg (2025) mass-radius figure to its content bounds at 2209x1930, removing a transparent band that filled two fifths of the width, and flatten the background onto white, which keeps the placed image independent of how the build converts transparency. The Schwieterman et al. (2018) biosignature-classes figure stays at its largest published form. Update the deck-status row in the planning document.

Author: timlichtenberg

book/14_synthesis/figures/lichtenberg2025_mass_radius.avif

@@ -665,7 +665,7 @@ Each lecture requires a companion PDF slide deck compiled from LaTeX source file
 | 11 | Gas & ice giants | Draft complete (16 NASA figures rebuilt from full-resolution JPL Photojournal sources; the Titan lakes radar mosaic keeps a small residual upscale because PIA17656 is its largest published form, and the published Triton map PIA18668 carries a faint graticule the old preview hid) | Medium |
 | 12 | Meteorites, asteroids, minor planets & comets | Draft complete (the Occator and Mordor Macula figures are rebuilt from full-resolution Photojournal sources and the DeMeo & Carry belt figure from its Nature-typeset version; the 67P nucleus and Chelyabinsk photographs stay at the largest published form, with credits corrected to the OSIRIS team and to A. Alishevskikh) | Medium |
 | 13 | Exoplanets | Draft complete (the Bryson et al. 2021 occurrence panels are rebuilt from the published AJ figure, the Owen & Wu 2013 evolution tracks from a 400 dpi render of the vector source with the full time-axis label, and the 55 Cancri e emission spectrum from the arXiv-embedded raster of Hu et al. 2024) | Medium |
-| 14 | Synthesis & astrobiology | Draft complete | Low |
+| 14 | Synthesis & astrobiology | Draft complete (the Wordsworth & Kreidberg circulation schematic, which also serves as the title background, is re-rendered at 400 dpi from the arXiv figure PDF and the Lichtenberg 2025 mass-radius figure is trimmed of a dead band and flattened onto white; the Schwieterman et al. 2018 biosignature-classes figure stays at the largest published form) | Low |
 
 **Slide infrastructure (complete):**
 - Custom Beamer theme: `slides/common/beamerthemeIPS.sty`: dark navy/teal palette, Inter + Fira Math fonts (XeLaTeX), `\ipscontain` for background images, `\sectionimage`/`\breakslide`/`\keyresult`/`\source` helper commands, thin accent-line frame titles, minimal footline (author, short title, slide number)