feat: FS-E strict filesystem mode - ext4 rw driver, FAT32 big-disk fix, forced re-login

- CODE/dsk/ext4.c: minimal full ext4 read/write (GPT probe, feature gate,
  extent depth 0/1 rw, block/inode alloc-free, dir insert, write-verify);
  boot selftest PASS on p2. Unsupported features panic (FS-E2x), zero fallback.
- DSK fat32 write: on-demand FAT entry RMW + chunked free-cluster scan
  (fixes "no free clusters" on 5.3G ESP); rec_len shrink offset (+4) and
  chunk alignment fixes. USER.CONF write-verify ok, firstInit flip ok.
- First-boot: wizard -> persist -> forced login (FS-E06 if skipped/failed)
  -> desktop. login.elf loaded via system/user/use fallback.
- FirstInit network page: Connect now panics NET-E01 (no wlan stack);
  Save (config only) is the only path forward.
- FirstInit/DSK fatal: ohMyLogo lotus fatal screen (NET-E01 / FS-E series).
- Boot screen: Logo.png image removed, "DESHAB P01" text centered only;
  dcp/xj logos regenerated from TEXTURES/.
- run_qemu.bat: main GPT image on SATA ide.0 (AHCI provider must see ext4).

CODE/UTSM/dkm/kernel_api.c

@@ -3,6 +3,9 @@
 #include <utsm/idt.h>
 #include <utsm/net.h>
 #include <utsm/mm.h>
+#include <utsm/dma.h>
+#include <utsm/drr.h>
+#include <utsm/utrw.h>
 #include <utsm/panic.h>
 
 static void dkm_api_info(const char *msg) {
@@ -81,13 +84,57 @@ static dkm_kernel_api g_kernel_api = {
     .mm_map_mmio = 0,
     .mm_unmap_mmio = 0,
     .register_apic_eoi = 0,
-    .sched = 0
+    .sched = 0,
+    .kapi = 0
 };
 
 const dkm_kernel_api *dkm_get_kernel_api(void) {
     return &g_kernel_api;
 }
 
+/* ===================================================================
+ *  D3: 按名导出表（kapi）——自由也要有地图
+ * =================================================================== */
+
+static const dkm_kapi_entry g_kapi_entries[] = {
+    { "log.info",           (void *)dkm_api_info },
+    { "log.warn",           (void *)dkm_api_warn },
+    { "log.error",          (void *)dkm_api_error },
+    { "log.panic",          (void *)dkm_api_panic },
+    { "dma.alloc_pages",    (void *)dma_alloc_pages },
+    { "irq.register",       (void *)irq_register },
+    { "irq.vector_alloc",   (void *)irq_vector_alloc },
+    { "irq.vector_free",    (void *)irq_vector_free },
+    { "mm.map_mmio",        (void *)mm_map_mmio },
+    { "mm.unmap_mmio",      (void *)mm_unmap_mmio },
+    { "apic.register_eoi",  (void *)idt_register_apic_eoi },
+    { "drr.snapshot_dirty", (void *)drr_ckpt_snapshot_dirty },
+    { "drr.rollback_pages", (void *)drr_rollback_pages },
+    { "utrw.debug_dump",    (void *)utrw_debug_dump_page },
+};
+
+static int kapi_lookup(const char *name, void **out_fn) {
+    if (!name) return -1;
+    for (u32 i = 0; i < sizeof(g_kapi_entries) / sizeof(g_kapi_entries[0]); i++) {
+        const dkm_kapi_entry *e = &g_kapi_entries[i];
+        const char *a = e->name, *b = name;
+        while (*a && *a == *b) { a++; b++; }
+        if (*a == 0 && *b == 0) {
+            if (out_fn) *out_fn = e->fn;
+            return 0;
+        }
+    }
+    return -1;
+}
+
+static const dkm_kapi_table g_kapi_table = {
+    .magic = DKM_KAPI_MAGIC,
+    .version = DKM_KAPI_VERSION,
+    .count = sizeof(g_kapi_entries) / sizeof(g_kapi_entries[0]),
+    .entries = g_kapi_entries,
+    .lookup = kapi_lookup,
+};
+
 #include "../arch/x86_64/limine.h"
 extern volatile struct limine_rsdp_request g_rsdp_request;
 extern volatile struct limine_framebuffer_request g_fb_request;
@@ -127,4 +174,6 @@ void dkm_fill_platform_info(void) {
     /* B7 阶段3: 暴露动态向量分配器（MSI/MSI-X 设备驱动使用） */
     g_kernel_api.irq_vector_alloc = irq_vector_alloc;
     g_kernel_api.irq_vector_free = irq_vector_free;
+    /* D3: 按名导出表挂入 kernel_api（尾部追加，ABI 兼容） */
+    g_kernel_api.kapi = &g_kapi_table;
 }

CODE/UTSM/dkm/kernel_api.d

@@ -1,7 +1,9 @@
 dkm/kernel_api.o: dkm\kernel_api.c include\utsm\dkm.h \
   include\utsm\types.h include\utsm\dma.h include\utsm\block.h \
   include\utsm\net.h include\utsm\paging.h include\utsm\log.h \
-  include\utsm\idt.h include\utsm\mm.h include\utsm\panic.h \
+  include\utsm\idt.h include\utsm\mm.h include\utsm\drr.h \
+  include\utsm\config.h include\utsm\utrw.h include\utsm\status.h \
+  include\utsm\capability.h include\utsm\panic.h \
   dkm\..\arch\x86_64\limine.h
 include\utsm\dkm.h:
 include\utsm\types.h:
@@ -12,5 +14,10 @@ include\utsm\paging.h:
 include\utsm\log.h:
 include\utsm\idt.h:
 include\utsm\mm.h:
+include\utsm\drr.h:
+include\utsm\config.h:
+include\utsm\utrw.h:
+include\utsm\status.h:
+include\utsm\capability.h:
 include\utsm\panic.h:
 dkm\..\arch\x86_64\limine.h:

CODE/UTSM/include/utsm/dkm.h

@@ -33,6 +33,30 @@
 struct dkm_kernel_api;
 struct dkm_driver_handle;
 
+/* ===================================================================
+ *  D3: 内核 API 按名导出表（kapi）
+ *
+ *  "自由也要有地图。" 固定偏移 struct ABI 之外的按名查找层：
+ *  驱动/用户态可枚举内核服务并按名取函数指针。
+ *  通过 kernel_api 尾部追加的 ->kapi 指针访问（ABI 兼容）。
+ * =================================================================== */
+typedef struct {
+    const char *name;   /* 如 "log.info"、"dma.alloc_pages" */
+    void *fn;           /* 服务函数指针（签名见对应服务头） */
+} dkm_kapi_entry;
+
+typedef struct {
+    u32 magic;          /* DKM_KAPI_MAGIC */
+    u32 version;        /* DKM_KAPI_VERSION */
+    u32 count;          /* entries 数量 */
+    const dkm_kapi_entry *entries;
+    /* 按名查找：命中返回 0 并写 out_fn；未命中 -1 */
+    int (*lookup)(const char *name, void **out_fn);
+} dkm_kapi_table;
+
+#define DKM_KAPI_MAGIC   0x4b415049u  /* "KAPI" */
+#define DKM_KAPI_VERSION 1u
+
 typedef struct dkm_driver_desc {
     u32 magic;
     u16 abi_version;
@@ -133,6 +157,9 @@ typedef struct dkm_kernel_api {
      * 驱动可用：task_create/uptime/sleep/current_task_slot。
      * DSK 以 api+0xA8 硬偏移读 block 的约定不受影响（仅尾部追加）。 */
     const utsm_sched_api *sched;
+    /* D3: 按名导出表（尾部追加，ABI 兼容）。驱动/用户态枚举内核服务并
+     * 按名取函数指针；固定偏移 struct 字段不受影响。 */
+    const dkm_kapi_table *kapi;
 } dkm_kernel_api;
 
 typedef enum dkm_driver_state {
@@ -160,6 +187,7 @@ typedef struct dkm_builtin_driver {
 void dkm_init(void);
 /* D4: 设置当前驱动日志颜色上下文（driver_init 前设置，返回后清 0） */
 void dkm_log_set_driver(const char *name);
+
 int dkm_load_builtin(const dkm_builtin_driver *driver);
 void dkm_scan_boot_modules(void);
 void dsm_load_by_manifest(void);

CODE/UTSM/kernel/gen_panic_logo.py

@@ -1,9 +1,9 @@
-#!/usr/bin/env python3
-"""Generate panic_logo_data.inc from ohMyLogo.png (root).
+#!/usr/bin/env python3
+"""Generate RGBA8888 C array from a PNG (panic screen / login intro logo).
 
-- Downscale logo to 384px wide (keep aspect), RGBA8888
-- Sample the 4 corners (averaged) as the panic-screen background color
-Usage: python gen_panic_logo.py <ohMyLogo.png> <panic_logo_data.inc>
+- Downscale logo to target width (keep aspect), RGBA8888
+- Sample the 4 corners (averaged) as background color
+Usage: python gen_panic_logo.py <src.png> <out.c> [target_width]
 """
 import sys
 from PIL import Image
@@ -16,10 +16,11 @@ TARGET_W = 384
 def main() -> None:
     src = sys.argv[1] if len(sys.argv) > 1 else SRC
     dst = sys.argv[2] if len(sys.argv) > 2 else DST
+    target_w = int(sys.argv[3]) if len(sys.argv) > 3 else TARGET_W
     im = Image.open(src).convert("RGBA")
     w0, h0 = im.size
-    scale = TARGET_W / w0
-    w, h = TARGET_W, max(1, round(h0 * scale))
+    scale = target_w / w0
+    w, h = target_w, max(1, round(h0 * scale))
     im = im.resize((w, h), Image.LANCZOS)
     px = im.load()
 

CODE/UTSM/test/utsm_selftest.c

@@ -1,6 +1,8 @@
 #include <utsm/utsm.h>
 #include <utsm/pckc.h>
 #include <utsm/crypto.h>
+#include <utsm/dma.h>
+#include <utsm/dkm.h>
 #include <utsm/log.h>
 #include <utsm/segment.h>
 #include <utsm/arena.h>
@@ -190,6 +192,38 @@ int utsm_selftest_run(void) {
         log_info("[UTSM] selftest unsealed segment ok (plain storage)");
     }
 
+    /* ==== D3: 按名导出表（kapi）——按名取服务并调用 ==== */
+    {
+        const dkm_kernel_api *api = dkm_get_kernel_api();
+        if (!api->kapi || api->kapi->magic != DKM_KAPI_MAGIC) {
+            log_error("[UTSM] selftest kapi table missing");
+            return UTSM_ERR_INVALID;
+        }
+        void *fn = 0;
+        if (api->kapi->lookup("log.info", &fn) != 0) {
+            log_error("[UTSM] selftest kapi lookup log.info failed");
+            return UTSM_ERR_INVALID;
+        }
+        void (*klog)(const char *) = (void (*)(const char *))fn;
+        klog("[UTSM] selftest kapi: log.info via export table");
+        if (api->kapi->lookup("dma.alloc_pages", &fn) != 0) {
+            log_error("[UTSM] selftest kapi lookup dma failed");
+            return UTSM_ERR_INVALID;
+        }
+        int (*kalloc)(u64, u64, u64, dkm_dma_buffer *) = (int (*)(u64, u64, u64, dkm_dma_buffer *))fn;
+        dkm_dma_buffer kbuf;
+        if (kalloc(1, 4096, 0xFFFFFFFFULL, &kbuf) != 0 || !kbuf.virt) {
+            log_error("[UTSM] selftest kapi dma alloc failed");
+            return UTSM_ERR_INVALID;
+        }
+        if (api->kapi->lookup("no.such.service", &fn) == 0) {
+            log_error("[UTSM] selftest kapi negative lookup failed");
+            return UTSM_ERR_INVALID;
+        }
+        log_hex64("[UTSM] selftest kapi entries=", api->kapi->count);
+        log_info("[UTSM] selftest kapi ok");
+    }
+
     /* ==== SCHED-1: O(1) runqueue 语义（合成 TCB，协作式，无 tick） ==== */
     /* ==== SCHED-1 + SCHED-2: runqueue / block-wake（tick 竞态保护） ==== */
     {

CODE/UTSM/test/utsm_selftest.d

@@ -4,9 +4,10 @@ test/utsm_selftest.o: test\utsm_selftest.c include\utsm\utsm.h \
   include\utsm\segment.h include\utsm\dirty.h include\utsm\utrw.h \
   include\utsm\vmm.h include\utsm\linux_loader.h include\utsm\ipc_shm.h \
   ..\utsm-ipc\ipc_proto.h include\utsm\hypercall.h include\utsm\pckc.h \
-  include\utsm\crypto.h include\utsm\log.h include\utsm\arena.h \
-  include\utsm\drr.h include\utsm\sched_ext.h include\utsm\sched.h \
-  test\chacha_kat.inc
+  include\utsm\crypto.h include\utsm\dma.h include\utsm\dkm.h \
+  include\utsm\block.h include\utsm\net.h include\utsm\paging.h \
+  include\utsm\log.h include\utsm\arena.h include\utsm\drr.h \
+  include\utsm\sched_ext.h include\utsm\sched.h test\chacha_kat.inc
 include\utsm\utsm.h:
 include\utsm\types.h:
 include\utsm\status.h:
@@ -24,6 +25,11 @@ include\utsm\ipc_shm.h:
 include\utsm\hypercall.h:
 include\utsm\pckc.h:
 include\utsm\crypto.h:
+include\utsm\dma.h:
+include\utsm\dkm.h:
+include\utsm\block.h:
+include\utsm\net.h:
+include\utsm\paging.h:
 include\utsm\log.h:
 include\utsm\arena.h:
 include\utsm\drr.h: