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/material/typography.cpp

@@ -183,7 +183,11 @@ bool Typography::load(ImGuiIO& io, float dpiScale)
     
     // ButtonLg: Medium
     fonts_[14] = loadFont(io, kWeightMedium, Layout::kFontButtonLg() * scale, "ButtonLg");
-    
+
+    // Monospace (Ubuntu Mono) at caption size — used by the console so terminal text +
+    // pretty-printed JSON columns align. Same size as Caption to keep line heights matched.
+    mono_ = loadFont(io, kWeightMono, Layout::kFontCaption() * scale, "Mono");
+
     // --- Icon fonts at multiple sizes ---
     // These are standalone fonts (not merged) so we can PushFont(iconXxx) for icon rendering.
     iconFonts_[0] = loadIconFont(io, 14.0f * scale, "IconSmall");
@@ -236,6 +240,10 @@ ImFont* Typography::loadFont(ImGuiIO& io, int weight, float size, const char* na
             fontData = g_ubuntu_medium_data;
             fontDataLen = g_ubuntu_medium_size;
             break;
+        case kWeightMono:
+            fontData = g_ubuntu_mono_data;
+            fontDataLen = g_ubuntu_mono_size;
+            break;
         case kWeightRegular:
         default:
             fontData = g_ubuntu_regular_data;
@@ -271,10 +279,10 @@ ImFont* Typography::loadFont(ImGuiIO& io, int weight, float size, const char* na
     cfg.GlyphRanges = glyphRanges;
     
     // Create a unique name for this font variant
-    snprintf(cfg.Name, sizeof(cfg.Name), "Ubuntu %s %.0fpx", 
-             weight == kWeightLight ? "Light" : 
-             weight == kWeightMedium ? "Medium" : "Regular",
-             size);
+    const char* weightName = weight == kWeightLight  ? "Light"  :
+                             weight == kWeightMedium ? "Medium" :
+                             weight == kWeightMono   ? "Mono"   : "Regular";
+    snprintf(cfg.Name, sizeof(cfg.Name), "Ubuntu %s %.0fpx", weightName, size);
     
     ImFont* font = io.Fonts->AddFontFromMemoryTTF(fontDataCopy, fontDataLen, size, &cfg);
     

src/ui/material/typography.h

@@ -168,6 +168,10 @@ public:
     ImFont* caption() const { return getFont(TypeStyle::Caption); }
     ImFont* overline() const { return getFont(TypeStyle::Overline); }
 
+    // Monospace (Ubuntu Mono) at caption size — for the console, so JSON/columns align
+    // like a real terminal. Falls back to the proportional caption font if not loaded.
+    ImFont* mono() const { return mono_ ? mono_ : caption(); }
+
     // Icon fonts — Material Design Icons merged at specific pixel sizes
     // Use these when you need to render an icon at a specific size via AddText/ImGui::Text.
     // Common sizes: iconSmall (14px), iconMed (18px), iconLarge (24px).
@@ -253,12 +257,16 @@ private:
     static constexpr int kWeightLight = 300;
     static constexpr int kWeightRegular = 400;
     static constexpr int kWeightMedium = 500;
+    static constexpr int kWeightMono = 401;   // selects Ubuntu Mono (monospace, regular)
     
     bool loaded_ = false;
     float dpiScale_ = 1.0f;
     
     // Fonts for each type style
     ImFont* fonts_[15] = {};
+
+    // Monospace font (Ubuntu Mono) at caption size — console/terminal text.
+    ImFont* mono_ = nullptr;
     
     // Icon fonts at different sizes: [0]=small(14), [1]=med(18), [2]=large(24), [3]=xl(40)
     ImFont* iconFonts_[4] = {};