feat(panic): FUCK [panic] mode=strict|fallback + realtest image variant

- UTSM panic_full returns in fallback mode (logs [PANIC:FALLBACK] + code + hit
  count); panic_halt keeps always-halt sites (CPU exception, VMM-E11 LA57,
  VMM-E15 DSK jump, UTSM-E42 test hook). Call sites given safe continuations.
- Mode passed to DSK/FirstInit/login/desktop via DSK_BOOT_FLAG_PANIC_FALLBACK;
  DKM kernel_api.panic / kern.log.panic return to driver; ext4 fatal aborts the
  op via setjmp/longjmp and DSK falls back to FAT32 ESP.
- build.ps1/Makefile: dev=strict, release=fallback, new realtest (release
  options + strict); default -Variant all; serialized iso packing under -j.
- Fix '*/' inside comments (dkm.h, kernel_api.h, bus.c) that broke the build.
- Includes pending work: dkm_bus service bus, mt7920/wlan drivers, desktop
  files/startmenu/prank, pe-tools, diskinfo, docs.

Co-authored-by: Cursor <cursoragent@cursor.com>

Makefile

@@ -1,10 +1,11 @@
 # Deshab-OS cross-platform build (F3: 疯不应绑 Windows)
 #
 # Linux/macOS (native or WSL):
-#   make dev          # build kernels+apps+drivers, inject dev config, pack ISO/deshab-dev.img
-#   make release      # same, release config -> ISO/deshab-release.img
-#   make realtest     # real-machine test config
+#   make dev          # build kernels+apps+drivers, inject dev config, pack ISO/deshab-dev.img (panic=strict)
+#   make release      # same, release config -> ISO/deshab-release.img (panic=fallback)
+#   make realtest     # real-machine test config, release options + panic=strict
 #   make both         # dev + release
+#   make all          # dev + release + realtest (SYSTEM restored to dev config)
 #   make kernels apps drivers   # compile only
 #
 # Requirements: clang + ld.lld (LLVM), GNU make, python3 + Pillow (logo),
@@ -53,9 +54,17 @@ DRV_OUTS := $(foreach s,$(DRV_SRCS),$(ROOT)/$(word 2,$(subst :, ,$(s))))
         inject-dev inject-release inject-realtest \
         iso-dev iso-release iso-realtest clean
 
-all: both
+# iso-* 共享 SYSTEM/ 注入点，-j 下必须串行打包
+all: kernels apps drivers
+	@$(MAKE) --no-print-directory iso-dev
+	@$(MAKE) --no-print-directory iso-release
+	@$(MAKE) --no-print-directory iso-realtest
+	@$(MAKE) --no-print-directory inject-dev
 
-both: dev release
+both: kernels apps drivers
+	@$(MAKE) --no-print-directory iso-dev
+	@$(MAKE) --no-print-directory iso-release
+	@$(MAKE) --no-print-directory inject-dev
 
 kernels:
 	@for d in $(KERNELS); do echo "[build] $$d"; $(MAKE) -C $$d -f MAKEFILE CC="$(CC)" LD="$(LD)" || exit 1; done