Book: Sargent — Linear Time Series: list on quantecon.org/books, theorem/exercise directives, figures

[mmcky]

Part of #362. Requested by Tom in #361.

Book

Linear Time Series — Thomas J. Sargent. Jupyter Book v1 site at https://thomassargent30.github.io/sargent-time-series/intro.html, source at thomassargent30/sargent-time-series. Self-hosted from Tom's GitHub account; quantecon.org links out.

Tasks

List on quantecon.org/books (QuantEcon/website; shape per _projects/dp-vol2.md)

• Add _projects/sargent-time-series.md (type: book; likely not category: quantecon since this is Tom's own book — confirm)
• Add cover to assets/img/books/ — draft cover: https://claude.ai/code/artifact/0c10c51c-9c81-4f52-90e0-3169fb0b6f65
• Confirm title, author line and card description with Tom; set order and new: true

Presentation pickups (PRs against Tom's repo, with his agreement)

• Theorems, proofs and exercises currently plain prose — move to {prf:theorem} / {prf:proof} / {exercise} / {solution} (sphinx-proof, sphinx-exercise)
• Add figures illustrating key ideas (impulse responses, spectral densities, Wold decompositions); AI-assisted generation is a good fit here — agree with Tom which ideas to illustrate

Acceptance criteria

• Card live on quantecon.org/books with cover and working link
• Directive and figure PRs opened against the repo (or declined by Tom, recorded here)