fix(control-ui): make log stream height responsive

Summary:
- Replace the fixed 500px Control UI Logs stream cap with a viewport-responsive max-height plus a 200px floor.
- Keep the offset documented inline and add the changelog entry for #53916.

Verification:
- git diff --check origin/main...HEAD
- git merge-tree --name-only origin/main HEAD
- node assertion confirmed `.log-stream` has `max-height: calc(100vh - 280px)`, `min-height: 200px`, and no `max-height: 500px`
- Source path check confirmed `renderLogs` renders the affected `.log-stream` container

Maintainer note:
- Real behavior proof requirement intentionally overridden by maintainer proof comment: https://github.com/openclaw/openclaw/pull/53916#issuecomment-4455196712

CHANGELOG.md

@@ -21,6 +21,7 @@ Docs: https://docs.openclaw.ai
 
 ### Fixes
 
+- Control UI/logs: make the Gateway Logs stream height responsive to the viewport with a minimum height floor, so larger screens can show substantially more log lines without collapsing on shorter viewports. (#53916) Thanks @extrasmall0.
 - ACP/Codex: surface redacted Codex wrapper stderr for generic ACP internal failures and preserve safe Codex model/provider routing in isolated `CODEX_HOME`, making `sessions_spawn(runtime="acp", agentId="codex")` failures actionable. Fixes #80079. (#80718) Thanks @leoge007.
 - ACP: treat rejected timeout config options as best-effort hints so ACP turns continue with adapters that do not support `session/set_config_option` timeout keys. Fixes #81250. (#81603) Thanks @qkal.
 - Cron/Codex: default exact-command scheduled agent turns to lightweight bootstrap context so automation runs the command before loading workspace identity or memory context.

ui/src/styles/components.css

@@ -3404,7 +3404,8 @@ td.data-table-key-col {
   border: 1px solid var(--border);
   border-radius: var(--radius-md);
   background: var(--card);
-  max-height: 500px;
+  max-height: calc(100vh - 280px); /* top nav + filter bar + page padding + breathing room */
+  min-height: 200px;
   overflow: auto;
   container-type: inline-size;
 }