board theme: make wrapping the page default so no board scrolls sideways

[Jammy2211]

The symptom

On a phone the Mind and Memory dashboards hold the viewport, while the other organ boards scroll right — the Heart board worst, with reason text running off the screen edge.

The cause

All six boards import one stylesheet, board/_theme.py (Heart, Hands and the umbrella board resolve it live through their sibling checkout), so this was never a per-repo drift. The sheet declared wrapping per component: overflow-wrap:anywhere sat on .task p and table.recent td only.

The Mind and Memory dashboards are built entirely from those two shapes, so they wrapped. Every element an organ adds itself had no wrap at all — and the Heart's <div class="reasons"><ul><li> is exactly that. One run URL in a red reason was enough.

Measured in a headless Chromium at a 375px viewport, with a red Heart fixture:

before:  VW=375  SCROLLW=575     ← 200px off-screen
         overflowing text: ": CI failure on main — https://github.co…"  parent=LI
after:   VW=375  SCROLLW=375

No element box was oversized — the text simply spilled out of its <li>, which is why it reads as text going off the right of the screen rather than a widened layout.

The change

Move the guard onto body, where overflow-wrap is inherited by markup this module has never seen, and bound the things that have no wrap opportunity to take:

body{…;overflow-wrap:anywhere}
img,svg,table{max-width:100%}
pre{overflow-x:auto}

The two component rules that carried their own copy drop it — one place, not seven. A board that needs a column on one line (white-space:nowrap) still may; what it must not do is re-declare the wrap per component, which is how the family drifted into one page that scrolled and one that did not. board/AGENTS.md records that as the sheet's phone invariant.

Verification

• Heart: 375/375 at both 390px and 320px, including a stress render with long workspace script paths, long section titles and the nowrap name column.
• Brain board and the Mind dashboard: unchanged, 375/375 and 305/305.
• Three new contract tests in tests/test_board_theme.py, including one asserting no component re-declares the wrap — that per-component drift is what caused the split.
• PyAutoBrain 465 passed; PyAutoHeart's tests/test_dashboard.py 66 passed against the new theme; PyAutoMind 181 passed.

Sequencing

PyAutoMind's dashboard.html embeds this stylesheet and is regenerated on a companion branch. Its dashboard_refresh.yml check renders with PyAutoBrain main, so this PR merges first; the Mind PR follows.

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Generated by Claude Code