feat: desktop environment improvements

programs/include/gui/desktop.hpp

@@ -36,6 +36,20 @@ struct DesktopState {
     SvgIcon icon_folder;
     SvgIcon icon_file;
     SvgIcon icon_computer;
+    SvgIcon icon_network;
+    SvgIcon icon_calculator;
+    SvgIcon icon_texteditor;
+    SvgIcon icon_go_up;
+    SvgIcon icon_go_back;
+    SvgIcon icon_go_forward;
+    SvgIcon icon_save;
+    SvgIcon icon_home;
+    SvgIcon icon_exec;
+
+    bool net_popup_open;
+    Zenith::NetCfg cached_net_cfg;
+    uint64_t net_cfg_last_poll;
+    Rect net_icon_rect;
 
     int screen_w, screen_h;
 };

programs/include/gui/gui.hpp

@@ -58,6 +58,8 @@ namespace colors {
     static constexpr Color MENU_HOVER    = {0xE8, 0xF0, 0xFE, 0xFF};
     static constexpr Color TERM_BG       = {0x2D, 0x2D, 0x2D, 0xFF};
     static constexpr Color TERM_FG       = {0xCC, 0xCC, 0xCC, 0xFF};
+    static constexpr Color PANEL_INDICATOR_ACTIVE   = {0x45, 0x58, 0x6A, 0xFF};
+    static constexpr Color PANEL_INDICATOR_INACTIVE = {0x35, 0x48, 0x5A, 0xFF};
 }
 
 struct Point {

programs/include/gui/terminal.hpp

@@ -80,7 +80,8 @@ static inline void terminal_scroll_up(TerminalState* t) {
     }
 }
 
-static inline void terminal_init(TerminalState* t, int cols, int rows) {
+// Initialize only the cell grid (no child process). Used by viewers like klog.
+static inline void terminal_init_cells(TerminalState* t, int cols, int rows) {
     t->cols = cols;
     t->rows = rows;
     t->cursor_x = 0;
@@ -91,13 +92,14 @@ static inline void terminal_init(TerminalState* t, int cols, int rows) {
     t->total_rows = rows;
     t->current_fg = colors::TERM_FG;
     t->current_bg = colors::TERM_BG;
-    t->cursor_visible = true;
+    t->cursor_visible = false;
     t->alt_screen_active = false;
     t->reverse_video = false;
     t->parse_state = TerminalState::STATE_NORMAL;
     t->csi_private = false;
     t->csi_param_count = 0;
     t->csi_current_param = 0;
+    t->child_pid = 0;
 
     int total_cells = cols * rows;
     t->cells = (TermCell*)zenith::alloc(total_cells * sizeof(TermCell));
@@ -106,6 +108,11 @@ static inline void terminal_init(TerminalState* t, int cols, int rows) {
         t->cells[i] = {' ', colors::TERM_FG, colors::TERM_BG};
         t->alt_cells[i] = {' ', colors::TERM_FG, colors::TERM_BG};
     }
+}
+
+static inline void terminal_init(TerminalState* t, int cols, int rows) {
+    terminal_init_cells(t, cols, rows);
+    t->cursor_visible = true;
 
     t->child_pid = zenith::spawn_redir("0:/os/shell.elf");
     zenith::childio_settermsz(t->child_pid, cols, rows);

programs/include/gui/window.hpp

@@ -25,6 +25,7 @@ using WindowDrawCallback  = void (*)(Window* win, Framebuffer& fb);
 using WindowMouseCallback = void (*)(Window* win, MouseEvent& ev);
 using WindowKeyCallback   = void (*)(Window* win, const Zenith::KeyEvent& key);
 using WindowCloseCallback = void (*)(Window* win);
+using WindowPollCallback  = void (*)(Window* win);
 
 struct Window {
     char title[MAX_TITLE_LEN];
@@ -48,6 +49,7 @@ struct Window {
     WindowMouseCallback on_mouse;
     WindowKeyCallback   on_key;
     WindowCloseCallback on_close;
+    WindowPollCallback  on_poll;
     void* app_data;
 
     Rect titlebar_rect() const {