Fix config reload crash and add ROM organizer docs

Author: nextcode4u

README.md

@@ -28,6 +28,7 @@ https://github.com/nextcode4u/FirmMux/tree/main/docs
 - `docs/RetroArch Emulators.md`
 - `docs/NDS Options.md`
 - `docs/Themes.md`
+- `docs/ROM Organizer (PowerShell).md`
 
 Widescreen notes and options:
 https://wiki.ds-homebrew.com/ds-index/rtcom?tab=forwarders

SD/3ds/FirmMux.3dsx

@@ -1 +1 @@
-198
+201

build_number.txt

@@ -0,0 +1,59 @@
+# ROM Organizer (PowerShell)
+
+For large ROM collections, use:
+https://github.com/nextcode4u/PowerShell-File-Organizer-Scripts
+
+This external script pack helps organize files inside an existing ROM system folder after files are already placed there, for example:
+
+- `sd:/roms/<system>/` (unorganized ROMs)
+
+It is especially useful when a single system folder has thousands of files and you want quick A–Z buckets for browsing and cleanup.
+
+## Scripts
+
+- `Alphabetic organizer.ps1`
+  - Sorts files in the current folder into `#` and `A`–`Z` subfolders.
+- `Flatten back to root.ps1`
+  - Moves files from subfolders back to the current root and removes empty folders.
+
+## Requirements
+
+- Windows
+- PowerShell 5.1 or newer
+
+If scripts are blocked, run:
+
+```powershell
+Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy RemoteSigned
+```
+
+## Suggested workflow for big ROM sets
+
+1. Download scripts from the repo above.
+2. Put the scripts into a large unsorted ROM folder.
+3. Run `Alphabetic organizer.ps1`.
+4. Work one letter bucket at a time to clean duplicates, bad dumps, and naming issues.
+5. Split cleaned files into system folders for FirmMux under `sd:/roms/<system>/`.
+6. Use `Flatten back to root.ps1` if you want to undo bucket folders.
+
+## How this helps with very large ROM collections
+
+- Reduces overload:
+  - Instead of one huge folder, you get smaller `#`, `A`–`Z` batches that are easier to review.
+- Speeds manual QA:
+  - You can verify names and remove duplicates in smaller chunks.
+- Improves final structure:
+  - After cleanup, move files to clear system paths like `sd:/roms/nds/`, `sd:/roms/gb/`, `sd:/roms/snes/`.
+- Safe rollback:
+  - If needed, flatten returns files back to one directory.
+
+## Practical example
+
+If you run `Alphabetic organizer.ps1` inside a folder, it organizes files in that same directory into:
+
+- `#` for names starting with numbers/symbols
+- `A` through `Z` for names starting with letters
+
+It does not auto-detect systems or move files by ROM type.
+
+Use it to organize files already inside `sd:/roms/<system>/` into filename buckets (`#`, `A`–`Z`) for easier browsing and cleanup.

docs/ROM Organizer (PowerShell).md

@@ -1,3 +1,3 @@
 #ifndef FIRMUX_BUILD_ID
-#define FIRMUX_BUILD_ID "Build:198"
+#define FIRMUX_BUILD_ID "Build:201"
 #endif

include/build_id.h

@@ -123,7 +123,14 @@ bool load_or_create_config(Config* cfg) {
     size_t size = 0;
     bool exists = file_exists(CONFIG_PATH);
     if (exists && read_file(CONFIG_PATH, &data, &size)) {
-        bool ok = parse_config((const char*)data, cfg);
+        char* text = (char*)malloc(size + 1);
+        bool ok = false;
+        if (text) {
+            memcpy(text, data, size);
+            text[size] = 0;
+            ok = parse_config(text, cfg);
+            free(text);
+        }
         free(data);
         if (ok) return true;
         rename(CONFIG_PATH, CONFIG_BAK_PATH);

source/config.c

@@ -2939,11 +2939,16 @@ static void reorder_base_targets(Config* cfg) {
 static void apply_emulator_targets(Config* cfg) {
     if (!cfg) return;
     if (g_base_target_count == 0) capture_base_targets(cfg);
+    if (g_base_target_count < 0) g_base_target_count = 0;
+    if (g_base_target_count > MAX_TARGETS) g_base_target_count = MAX_TARGETS;
     cfg->target_count = g_base_target_count;
     for (int i = 0; i < g_base_target_count; i++) cfg->targets[i] = g_base_targets[i];
     reorder_base_targets(cfg);
 
-    for (int i = 0; i < g_emu.count && cfg->target_count < MAX_TARGETS; i++) {
+    int emu_count = g_emu.count;
+    if (emu_count < 0) emu_count = 0;
+    if (emu_count > MAX_SYSTEMS) emu_count = MAX_SYSTEMS;
+    for (int i = 0; i < emu_count && cfg->target_count < MAX_TARGETS; i++) {
         const EmuSystem* sys = &g_emu.systems[i];
         if (!sys->enabled) continue;
         Target* t = &cfg->targets[cfg->target_count];
@@ -3335,16 +3340,20 @@ static void handle_option_action(int idx, Config* cfg, State* state, int* curren
         g_nds_cache.count = 0;
         snprintf(status_message, status_size, "Cache cleared");
     } else if (action == OPTION_ACTION_RELOAD_CONFIG) {
-        Config newcfg;
-        if (load_or_create_config(&newcfg)) {
-            *cfg = newcfg;
+        Config* newcfg = (Config*)malloc(sizeof(Config));
+        if (!newcfg) {
+            snprintf(status_message, status_size, "Reload failed");
+        } else if (load_or_create_config(newcfg)) {
+            *cfg = *newcfg;
             g_base_target_count = 0;
             rebuild_targets_from_backend(cfg, state, current_target, state_dirty, status_message, status_size, status_timer);
             apply_theme_from_state_or_config(cfg, state);
             if (state_dirty) *state_dirty = true;
             snprintf(status_message, status_size, "Config reloaded");
+            free(newcfg);
         } else {
             snprintf(status_message, status_size, "Reload failed");
+            free(newcfg);
         }
     } else if (action == OPTION_ACTION_TOGGLE_DEBUG) {
         bool on = !debug_log_enabled();