Phase 7: rename SkyOS → OrionOS across entire codebase

- Rename all binaries: skywm→orionwm, skydeskbar→oriondeskbar,
  skylauncher→orionlauncher, skyinstall/skyinstall-gui→orioninstall*
- Rename theme directory: themes/SkyOS/ → themes/OrionOS/
- Update all string literals, window titles, menu labels, and comments
- Update ISO build: hostname→orionos, user→orion, all paths/labels
- Add Plymouth boot splash theme (orionos) with Navy+Blue palette
- Update GTK2/GTK3 theme names, wallpaper output name
- Update .gitignore, root Makefile, build-iso.sh for new binary names

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

deskbar/Makefile

@@ -12,7 +12,7 @@ LDFLAGS = $(PKG_XFT_L)
 
 SRC = src/deskbar.c
 OBJ = $(SRC:.c=.o)
-BIN = skydeskbar
+BIN = oriondeskbar
 
 .PHONY: all clean install
 all: $(BIN)

deskbar/include/deskbar.h

@@ -13,10 +13,10 @@
 #include <unistd.h>
 
 /*
- * SkyDeskbar — modern dark panel, docked top-right.
+ * OrionDeskbar — modern dark panel, docked top-right.
  *
  *  ┌──────────────────────────┐
- *  │ [Sky ▾]  │  12:00 PM    │  <- top strip: menu + clock
+ *  │ [Orion ▾]│  12:00 PM    │  <- top strip: menu + clock
  *  │          │  Wed Jul 23  │  <- date line
  *  ├──────────────────────────┤
  *  │ [F] Firefox            ▸ │  <- app entries (letter icon + name)
@@ -34,7 +34,7 @@
 /* ── layout ──────────────────────────────────────────────────────────── */
 #define DB_W          200      /* deskbar total width */
 #define DB_TOP_H       52      /* top strip height (menu + clock + date) */
-#define DB_MENU_W      68      /* width of the Sky menu button */
+#define DB_MENU_W      68      /* width of the Orion menu button */
 #define DB_ITEM_H      26      /* app entry row height */
 #define DB_ICON_SZ     18      /* app icon square size */
 #define DB_WS_H        28      /* workspace strip height */
@@ -54,7 +54,7 @@
 /* ── modern dark palette ──────────────────────────────────────────────── */
 #define DB_COL_BG          0x111520   /* dark navy body */
 #define DB_COL_MENU_BG     0x0E1A32   /* menu button bg */
-#define DB_COL_LOGO_TEXT   0x90BBEE   /* "Sky" text */
+#define DB_COL_LOGO_TEXT   0x90BBEE   /* "Orion" text */
 #define DB_COL_ITEM_BG     0x141828   /* app row bg */
 #define DB_COL_ITEM_ALT    0x111520   /* alternate row */
 #define DB_COL_ITEM_HOV    0x1E4878   /* hover — blue */

deskbar/src/deskbar.c

@@ -359,7 +359,7 @@ void db_draw(Deskbar *db) {
     XSetForeground(db->dpy, db->gc, db_color(db, DB_COL_ACCENT));
     XFillRectangle(db->dpy, db->win, db->gc, 0, 0, DB_W, 2);
 
-    /* Sky menu button — highlight when menu is open */
+    /* Orion menu button — highlight when menu is open */
     unsigned long sky_bg = db->menu_win ? 0x1A3868 : DB_COL_MENU_BG;
     XSetForeground(db->dpy, db->gc, db_color(db, sky_bg));
     XFillRectangle(db->dpy, db->win, db->gc, 0, 2, DB_MENU_W, DB_TOP_H - 2);
@@ -368,9 +368,9 @@ void db_draw(Deskbar *db) {
         XSetForeground(db->dpy, db->gc, db_color(db, DB_COL_ACCENT));
         XFillRectangle(db->dpy, db->win, db->gc, 0, DB_TOP_H - 2, DB_MENU_W, 2);
     }
-    /* "Sky \xe2\x96\xbe" = "Sky ▾" */
+    /* "Orion ▾" */
     draw_str_centered(db, xd, db->font_menu, DB_COL_LOGO_TEXT,
-                      0, 2, DB_MENU_W, DB_TOP_H - 2, "Sky \xe2\x96\xbe");
+                      0, 2, DB_MENU_W, DB_TOP_H - 2, "Orion \xe2\x96\xbe");
 
     /* vertical divider */
     XSetForeground(db->dpy, db->gc, db_color(db, DB_COL_BORDER_D));
@@ -533,7 +533,7 @@ void db_draw(Deskbar *db) {
             pos += snprintf(status + pos, sizeof(status) - pos,
                             "  BAT %d%%%s", bat, arrow);
         }
-        if (pos == 0) snprintf(status, sizeof(status), "SkyOS");
+        if (pos == 0) snprintf(status, sizeof(status), "OrionOS");
         draw_str_centered(db, xd, db->font_date, DB_COL_STATUS_TXT,
                           0, sy, DB_W, DB_STATUS_H, status);
     }
@@ -569,12 +569,12 @@ static const char *S1_CMD[] = {
 #define NS1 5
 
 static const MI MENU[] = {
-    { "Install SkyOS...", "alacritty -e bash -c 'sudo skyinstall; exec bash' &", 0, 0,-1 },
+    { "Install OrionOS...", "alacritty -e bash -c 'sudo skyinstall; exec bash' &", 0, 0,-1 },
     { NULL,               NULL,                                       1, 0,-1 },
     { "Applications",     NULL,                                       0, 1, 0 },
     { "Settings",         NULL,                                       0, 1, 1 },
     { NULL,               NULL,                                       1, 0,-1 },
-    { "About SkyOS",      "alacritty -e bash -c 'fastfetch; read' &", 0, 0,-1 },
+    { "About OrionOS",      "alacritty -e bash -c 'fastfetch; read' &", 0, 0,-1 },
     { "Lock Screen",      "xscreensaver-command -lock &",             0, 0,-1 },
     { NULL,               NULL,                                       1, 0,-1 },
     { "Restart",          "systemctl reboot",                         0, 0,-1 },
@@ -822,7 +822,7 @@ void db_click(Deskbar *db, int x, int y) {
     int ay = db_apps_y();
     int wy = db_ws_y(db);
 
-    /* Sky menu button → toggle fly-out menu */
+    /* Orion menu button → toggle fly-out menu */
     if (y < DB_TOP_H && x < DB_MENU_W) {
         if (db->menu_win) db_menu_close(db);
         else db_menu_open(db);
@@ -870,7 +870,7 @@ void db_click(Deskbar *db, int x, int y) {
 
 void db_init(Deskbar *db) {
     db->dpy = XOpenDisplay(NULL);
-    if (!db->dpy) { fprintf(stderr, "skydeskbar: cannot open display\n"); exit(1); }
+    if (!db->dpy) { fprintf(stderr, "oriondeskbar: cannot open display\n"); exit(1); }
 
     db->screen     = DefaultScreen(db->dpy);
     db->root       = RootWindow(db->dpy, db->screen);