WebUI stat cards & test button: self-managed IO support, dash when JVS disconnected, vertical centering

[Copilot]

Adds first-class support for Sega IO boards that manage their own test-menu exit, plus two cosmetic fixes for the stat card grid.

Changes

src/jvs/io.h

• Added testButtonSelfManaged field to JVSCapabilities to flag IO boards whose arcade system manages its own test-menu exit.

src/console/config.c

• Parse the new TEST_BUTTON_SELF_MANAGED config directive into JVSCapabilities.

src/modernjvs.c

• Added TEST_PULSE_MS (300 ms) constant and CLEAR_PULSE_TIMER macro.
• When testButtonSelfManaged is set, the test button is only held active for a brief pulse and then automatically released (using CLOCK_MONOTONIC timing), so the WebUI status reflects reality after the user exits the test menu on the machine.

src/webui/modernjvs-webui.py

• Added _io_self_managed() helper and exposed emulate_test_self_managed in both the config API response and the /api/control/test_button POST response.

src/webui/templates/index.html

• Added a hidden #testModeSelfManagedNote element (yellow warning text) that is shown when a self-managed IO board is active, prompting the user to use Exit & Save inside the test menu to exit.

src/webui/static/app.js — updateTestButtonUI

• Now accepts a selfManaged parameter.
• Self-managed boards: shows Self-Managed label in yellow with the Exit & Save warning note.
• No JVS connection: shows — in muted colour instead of "Inactive".
• Normal boards: shows Active / Inactive as before.

src/webui/static/style.css — .stat-card

• Added display: flex; flex-direction: column; justify-content: center; align-items: center; so that when one card in a row grows taller than its siblings (e.g. due to the self-managed warning note), the other cards' text stays vertically centred rather than anchored to the top.

docs/modernjvs/ios/sega-type-1, sega-type-2, sega-type-3, sega-838-13683B, sega-trackball

• Added TEST_BUTTON_SELF_MANAGED 1 to each Sega IO board profile.

misc/configuration.md

• Added ⚠ markers to all self-managed IO boards in the supported boards table, with an explanatory footnote.

[dazzaXx]

@copilot update the PR description if possible to show all changes made in this PR.

[Copilot]

@copilot update the PR description if possible to show all changes made in this PR.

Done — the PR description now lists every changed file and what was done in each, covering all 7 commits:

• src/jvs/io.h — new testButtonSelfManaged field in JVSCapabilities
• src/console/config.c — parse TEST_BUTTON_SELF_MANAGED config directive
• src/modernjvs.c — TEST_PULSE_MS / CLEAR_PULSE_TIMER; auto-releases the test button after 300 ms on self-managed boards so the WebUI reflects real state
• src/webui/modernjvs-webui.py — expose emulate_test_self_managed in config & toggle API responses
• src/webui/templates/index.html — hidden "Exit & Save" warning note element
• src/webui/static/app.js — updateTestButtonUI handles self-managed / disconnected / normal states
• src/webui/static/style.css — flex-column centering on .stat-card for mixed-height rows
• docs/modernjvs/ios/sega-* — TEST_BUTTON_SELF_MANAGED 1 added to all five Sega IO profiles
• misc/configuration.md — ⚠ markers and footnote for self-managed boards