fix: backward-compat + bug fixes and man-page build fix for 0.16.0

Post-0.15.0 review of the 0.15.0..HEAD range surfaced regressions and
bugs. This restores backward compatibility for existing configs/CSS,
fixes confirmed defects, and repairs the scdoc man-page build break on
master. Pango-markup tooltips are intentional and were kept.

Backward-compat restorations:
- AModule: honor legacy numeric Gdk::CursorType cursor values (int overload)
- memory: correct GiB divisor (was ~2.3% low); round bare {} placeholders
- wireplumber: scale max-volume into the linear domain so the cap works again
- idle_inhibitor: gate right/middle-click deactivate & scroll on dynamic-timeouts;
  accept both dynamic-timeout(s); widen timeout to double (no fractional truncation)
- custom: keep #custom-<name>.<class> CSS selectors working (classes on box_)
- image: don't wordexp-split a single path; fall back to the literal path
- niri/window: restore hide-when-empty (new show-empty opt-in); escape tooltip
- wlr/taskbar: plain-text tooltip when markup is disabled

Bug fixes:
- tray: fix use-after-free in onAdd; guard the watcher retry timeout
- hyprland: clamp max-windows iterator (OOB); drop duplicate language tooltip block
- niri/window: supply {col}/{max_col} args in the empty branch (fmt::format_error)
- mpris: escape {dynamic}/{player} tooltip; fix dangling player; albumArtist source
- mango: fix use-after-free race (dispatch under callback_mutex_)
- mpd: contain throwing checkErrors in noexcept idle paths (no std::terminate/UAF)
- keyboard_state: always render every lock label, with guarded defaults
- bluetooth: bound GATT ReadValue timeout, opt-in + services-resolved gating,
  preserve authoritative Battery1 percentage
- wireplumber: fix WpDevice reference leak / NULL handling
- battery, clock, dwl, wayfire, graph, custom_graph, transform, river: assorted
  crash/logic fixes

Man page / build:
- niri-workspaces: fix scdoc "indented by an amount greater than 1"
  (workspace-taskbar sub-options were mis-indented; breaks man-page build)
- document new show-empty (niri/window); correct network {txBitrate}/{rxBitrate}

Not compiled locally (no gtkmm on this host); C++ build relies on CI.
Man pages validated with scdoc 1.11.4.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/AGraph.cpp

@@ -3,6 +3,7 @@
 #include <cairomm/context.h>
 #include <fmt/format.h>
 
+#include <algorithm>
 #include <cmath>
 #include <fstream>
 #include <iostream>
@@ -17,10 +18,13 @@ AGraph::AGraph(const Json::Value& config, const std::string& name, const std::st
     : AModule(config, name, id,
               config["format-alt"].isString() || config["menu"].isString() || enable_click,
               enable_scroll),
-      interval_(config_["interval"] == "once"
-                    ? std::chrono::seconds::max()
-                    : std::chrono::seconds(
-                          config_["interval"].isUInt() ? config_["interval"].asUInt() : interval)) {
+      interval_(
+          config_["interval"] == "once"
+              ? std::chrono::milliseconds::max()
+              : std::chrono::milliseconds(
+                    config_["interval"].isNumeric()
+                        ? std::max(1L, static_cast<long>(config_["interval"].asDouble() * 1000))
+                        : 1000L * static_cast<long>(interval))) {
   graph_.signal_draw().connect(sigc::mem_fun(*this, &AGraph::onDraw));
   graph_.set_name(name);
   if (!id.empty()) {