feat(console): persist the output zoom level across launches

The console zoom (s_console_zoom) was a plain static reset to 1.0 each launch,
unlike the sibling toggles. Wire it through Settings (console_zoom float),
restored into the static at startup in the App ctor and written back via the
existing post-render diff-and-save. Loading clamps to [0.25, 4.0] (also
catching NaN) so a corrupt value can't feed the scanline divisor.

Verified: seeding console_zoom=1.5 survives a relaunch and the console text
renders larger.

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

src/app.cpp

@@ -313,6 +313,7 @@ bool App::init()
     ui::ConsoleTab::s_scanline_enabled       = settings_->getScanlineEnabled();
     ui::ConsoleTab::s_line_accents_enabled   = settings_->getConsoleLineAccents();
     ui::ConsoleTab::s_line_text_color_enabled = settings_->getConsoleTextColor();
+    ui::ConsoleTab::s_console_zoom           = settings_->getConsoleZoom();
 
     // Apply saved user font scale so fonts are correct on first reload
     {
@@ -1798,9 +1799,11 @@ void App::render()
             // disk I/O — and only here in the Console case where these statics can change.
             if (settings_) {
                 if (ui::ConsoleTab::s_line_accents_enabled != settings_->getConsoleLineAccents() ||
-                    ui::ConsoleTab::s_line_text_color_enabled != settings_->getConsoleTextColor()) {
+                    ui::ConsoleTab::s_line_text_color_enabled != settings_->getConsoleTextColor() ||
+                    ui::ConsoleTab::s_console_zoom != settings_->getConsoleZoom()) {
                     settings_->setConsoleLineAccents(ui::ConsoleTab::s_line_accents_enabled);
                     settings_->setConsoleTextColor(ui::ConsoleTab::s_line_text_color_enabled);
+                    settings_->setConsoleZoom(ui::ConsoleTab::s_console_zoom);
                     settings_->save();
                 }
             }

src/config/settings.cpp

@@ -177,6 +177,8 @@ bool Settings::load(const std::string& path)
         loadScalar(j, "scanline_enabled", scanline_enabled_);
         loadScalar(j, "console_line_accents", console_line_accents_);
         loadScalar(j, "console_text_color", console_text_color_);
+        loadScalar(j, "console_zoom", console_zoom_);
+        if (!(console_zoom_ >= 0.25f && console_zoom_ <= 4.0f)) console_zoom_ = 1.0f;  // guard bad/NaN
         if (j.contains("hidden_addresses") && j["hidden_addresses"].is_array()) {
             hidden_addresses_.clear();
             for (const auto& a : j["hidden_addresses"])
@@ -429,6 +431,7 @@ bool Settings::save(const std::string& path)
     j["scanline_enabled"] = scanline_enabled_;
     j["console_line_accents"] = console_line_accents_;
     j["console_text_color"] = console_text_color_;
+    j["console_zoom"] = console_zoom_;
     j["hidden_addresses"] = json::array();
     for (const auto& addr : hidden_addresses_)
         j["hidden_addresses"].push_back(addr);

src/config/settings.h

@@ -195,6 +195,8 @@ public:
     void setConsoleLineAccents(bool v) { console_line_accents_ = v; }
     bool getConsoleTextColor() const { return console_text_color_; }
     void setConsoleTextColor(bool v) { console_text_color_ = v; }
+    float getConsoleZoom() const { return console_zoom_; }
+    void setConsoleZoom(float v) { console_zoom_ = v; }
 
     // Hidden addresses (addresses hidden from the UI by the user)
     const std::set<std::string>& getHiddenAddresses() const { return hidden_addresses_; }
@@ -491,6 +493,7 @@ private:
     bool scanline_enabled_ = true;
     bool console_line_accents_ = true;   // left color accent bars in console output
     bool console_text_color_ = true;     // per-channel text coloring in console output
+    float console_zoom_ = 1.0f;          // console output font zoom factor
     std::set<std::string> hidden_addresses_;
     std::set<std::string> favorite_addresses_;
     std::map<std::string, AddressMeta> address_meta_;