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/modules/custom_graph.cpp

@@ -2,6 +2,11 @@
 
 #include <spdlog/spdlog.h>
 
+#include <algorithm>
+#include <cmath>
+#include <stdexcept>
+#include <string>
+
 #include "util/scope_guard.hpp"
 
 waybar::modules::CustomGraph::CustomGraph(const std::string& name, const std::string& id,
@@ -228,6 +233,22 @@ void waybar::modules::CustomGraph::parseOutputRaw() {
         tooltip_ = validated_line;
       }
       class_.clear();
+      // Derive the graph value from the first line's leading numeric value,
+      // since the raw (i3blocks) format has no dedicated percentage field.
+      std::string value = validated_line;
+      if (!value.empty() && value.back() == '%') {
+        value.pop_back();
+      }
+      try {
+        double parsed = std::stod(value);
+        if (std::isnan(parsed)) {
+          percentage_ = 0;
+        } else {
+          percentage_ = static_cast<int>(std::clamp(std::lround(parsed), 0L, 100L));
+        }
+      } catch (const std::exception&) {
+        percentage_ = 0;
+      }
     } else if (i == 1) {
       if (config_["escape"].isBool() && config_["escape"].asBool()) {
         tooltip_ = Glib::Markup::escape_text(validated_line);