docs: consolidate slide decks under docs/slides/ and redraw the sysID pipeline figure

[yichao-liang]

Documentation only. No predicators/ code is touched.

Three commits, each self-contained:

1. docs/sysid: redraw the pipeline figure around the landed honesty fixes

The pipeline diagram still told the pre-#99 story: red badges on four failure modes with the remedies listed as "planned". All six have since landed on master (PRs #99-#103), so the badges are green and each one names the run that motivated it.

• New boxes for declaration evidence (sim.residuals(rollout=True)) and the combined-substrate certificate probe.
• Stage bodies updated to current behaviour: Huber-capped SSE with summary terms, dropped fits feeding hull candidates, the 32-point sweep running over the disagreement hull, INCONSISTENT swept rather than disarming the gate, dropped params reverting to registry values.
• Box y-centers are computed in _layout() from per-lane stack heights instead of being hand-placed, so adding a box can no longer silently overlap its neighbour.
• draw() takes an output path and an include_legend flag; the script also emits sysid_pipeline_compact.png for decks that carry the caption themselves.
• The landscape figure gets real matplotlib legends in place of the end-of-line annotations, which collided with the curves once the y-range widened.

2. docs/slides: collect the reveal.js decks into one directory

The three decks had accumulated in docs/, docs/envs/ and docs/sysid/. They now all live under docs/slides/, with shared figures in docs/slides/assets/. build_deck.py writes there, and the sysID deck refers to its figures as ../sysid/*.png so they stay next to the scripts that generate them.

Both hand-written decks are refreshed while moving:

• The agent planning deck is rebuilt around run_20260729_232733 (seed 2) in place of run_20260723_110212, with that run's own scene renders, at-a-glance table and captured 2-blue relay plan.
• The sysID deck moves from "branch domino-sysid, fixes planned" to the state on master after PRs agent_sdk: session-probe tool surface, sysID subset fits, solve-journal lifecycle (sysID stack 1/8) #96-sim_learning+agent_sdk: open-loop rollout residuals, combined-substrate probe, solve-prompt strategy blocks (sysID stack 8/8) #103, including a new slide on why declaring a physical param is a decision and why teacher-forced residuals cannot inform it.

The task-generation deck is generated output and moves unchanged.

3. docs/slides: weekly sync deck for 2026-07-30 and its mosaic assets

Covers the 10/10 al_margin result on domino_high_friction_turn, the five pipeline stages with this week's changes marked inline, and the next steps. Assets are 3x3 episode mosaics rather than individual episode videos; make_al_margin_mosaics.py regenerates them from a run's per-episode mp4s with ffmpeg.

Checks

isort, docformatter and pylint run clean locally on the four touched/added docs/*.py files at the CI-pinned versions (isort 5.10.1, docformatter 1.4). mypy excludes docs/ by config; yapf only covers predicators/, scripts/, tests/, setup.py.