feat(console): terminal polish — lite/color-coded toggles, dark bg, monospace font

Work through the console items in todo.md:

- Lite filter toggles (#5): replace the single hasLogFilters() bool with a
  ConsoleLogFilterCaps struct so each backend advertises which toggles apply.
  Full node = daemon/errors/rpc-trace/app; lite = errors-only + app (its
  diagnostics ring maps to the App/Error channels; the text filter is always
  shown). Lite previously showed no toggles at all.
- Color-coded toggles (#6): each filter checkbox is tinted with its channel's
  accent color (daemon=blue, errors=red, rpc=secondary, app=teal) via a new
  channelAccentColor() that also drives the output's left accent bar — one source
  of truth for channel color.
- Darker terminal look (#7): drop the light glass rectangle on the input; both
  output and input now get a terminal-dark overlay (tabs.console.bg-darken-alpha,
  default 110) and the input field blends into it (transparent frame bg).
- Monospace font (#8): bundle Ubuntu Mono (res/fonts/UbuntuMono-R.ttf, Ubuntu
  Font License — same family as the existing Ubuntu fonts) via INCBIN, load it at
  caption size as Type().mono(), and render console output + input in it so
  pretty-printed JSON columns and terminal text align. Falls back to the
  proportional caption font if unavailable.

Full-node + lite build clean; ctest green; source hygiene clean; sandboxed
startup smoke confirms the mono font loads + atlas builds without crashing.

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

src/ui/windows/console_tab.h

@@ -24,6 +24,7 @@ namespace dragonx {
 namespace ui {
 
 class ConsoleCommandExecutor;
+struct ConsoleLogFilterCaps;
 
 /**
  * @brief Console tab — a rich terminal shared by the full-node and lite variants.
@@ -92,6 +93,9 @@ private:
     // line stores only its semantic ConsoleChannel (in ConsoleModel); the text color and
     // the left accent-bar color are both derived from it at draw time.
     ImU32 channelTextColor(ConsoleChannel channel) const;
+    // Saturated accent color for a channel — the left accent-bar color, also used to tint the
+    // matching toolbar filter toggle. 0 for channels that get no accent (result/JSON/None).
+    static ImU32 channelAccentColor(ConsoleChannel channel);
 
     // Drain the thread-safe ingest queue into the visible model (once per frame, main
     // thread), applying the line cap + selection/scroll bookkeeping for the new lines.
@@ -105,7 +109,7 @@ private:
     // renderToolbar() draws the top bar; these are its sub-steps:
     void renderToolbar(ConsoleCommandExecutor& exec);
     void drawToolbarStatus(ConsoleCommandExecutor& exec);  // backend status dot + label
-    void drawLogFilterToggles();                           // daemon/errors/rpc/app checkboxes
+    void drawLogFilterToggles(const ConsoleLogFilterCaps& caps);  // color-coded filter checkboxes
     void drawFilterInput();                                // text filter + match count
     void drawZoomControls();                               // zoom -/+ buttons