README: new "冷却与半冷却探测（自愈调度）" section with the per-class cooldown
table (5xx exponential to 5min / 401-403 10min / 429 30s fixed / quota aligned
to its window), the probe-slot formula and the ordering rule that probes are
tried last. The LuaJIT section now says the pool is an elastic ceiling rather
than a preallocation and documents both step formulas. Headline figures replaced
with measured ones: idle ~10 MB, ~19 MB starting with a 29 MB audit log, and a
new bullet for on-demand log loading.
package.json also loses a `\u2014` escape and the broken indentation that an
earlier edit left in the electron-builder block.
Window/taskbar icon never showed because the packaged .desktop had
StartupWMClass=ModelRouter while the live window WM_CLASS is the lowercase
app class 'modelrouter-gui' — no match, so GNOME fell back to the default
Electron icon.
- main.js: set BrowserWindow icon asset + backgroundColor (window paints
correctly with frameless titlebar and provides the taskbar's default icon)
- package.json: build.linux.desktop.entry.StartupWMClass now equals the real
WM_CLASS so packaged installs match too
- local integration: user-level .desktop installed at
~/.local/share/applications/modelrouter-gui.desktop (points at the unpacked
binary) so GNOME resolves the icon immediately
