clean: remove all Doom-specific logic, fix path separator in jsdos.json

Removed:
- injectDoomConfig() — WAD-detection and WASD config injection
- buildDoomDefaultCfg() — Doom config file generator
- All calls to injectDoomConfig in both bundle paths

Fixed:
- buildJsdosJson() now also uses splitPath() helper to handle
  backslash separators (was using lastIndexOf('/') only)
- Extracted shared splitPath() method used by both
  buildJsdosJson and buildDosboxConf

No more game-specific hacks. Just clean config generation.

src/main/java/com/dostalgia/UploadResource.java

@@ -83,14 +83,11 @@ public class UploadResource {
             if ("sockdrive".equals(bundleType)) {
                 // Copy files loose
                 copyDir(extractDir, gameDir);
-                // Auto-inject WASD config for Doom-engine games
-                injectDoomConfig(extractDir, gameDir);
-                // Write dosbox.conf (full config, not just autoexec)
+                // Write js-dos config
                 Path jsdos = gameDir.resolve(".jsdos");
                 Files.createDirectories(jsdos);
                 String relExe = extractDir.relativize(Path.of(mainExe)).toString().replace('/', '\\');
-                String conf = buildDosboxConf(relExe);
-                Files.writeString(jsdos.resolve("dosbox.conf"), conf);
+                Files.writeString(jsdos.resolve("dosbox.conf"), buildDosboxConf(relExe));
                 Files.write(jsdos.resolve("jsdos.json"), buildJsdosJson(relExe));
                 bundleFile = ".jsdos/dosbox.conf";
             } else {
@@ -210,15 +207,12 @@ public class UploadResource {
         Path tmpBundle = Files.createTempDirectory("dostalgia-bundle-");
         try {
             copyDir(extractDir, tmpBundle);
-            // Auto-inject WASD config for Doom-engine games
-            injectDoomConfig(extractDir, tmpBundle);
 
-            // Create .jsdos config (full config, not just autoexec)
+            // Create .jsdos config
             Path jsdos = tmpBundle.resolve(".jsdos");
             Files.createDirectories(jsdos);
             String relExe = extractDir.relativize(Path.of(mainExe)).toString().replace('/', '\\');
-            String conf = buildDosboxConf(relExe);
-            Files.writeString(jsdos.resolve("dosbox.conf"), conf);
+            Files.writeString(jsdos.resolve("dosbox.conf"), buildDosboxConf(relExe));
             Files.write(jsdos.resolve("jsdos.json"), buildJsdosJson(relExe));
 
             // ZIP it up
@@ -239,23 +233,11 @@ public class UploadResource {
         }
     }
 
-    // ─── File Utilities ──────────────────────────────────────────
+    // ─── Configuration Helpers ───────────────────────────────────
 
-    /**
-     * Build a minimal dosbox.conf with the critical settings for js-dos v8.
-     * The key setting is usescancodes=true — without it DOSBox doesn't
-     * translate physical key presses into game input.
-     */
     private byte[] buildJsdosJson(String relExe) {
-        // Split into directory and executable components for subdirectory support
-        String dir = "";
-        String exe = relExe;
-        int idx = relExe.lastIndexOf('/');
-        if (idx >= 0) {
-            dir = relExe.substring(0, idx);
-            exe = relExe.substring(idx + 1);
-        }
-        String script = (dir.isEmpty() ? "" : "cd " + dir + " && ") + exe;
+        String parts[] = splitPath(relExe);
+        String script = (parts[0].isEmpty() ? "" : "cd " + parts[0] + " && ") + parts[1];
         String json = "{"
             + "\"autoexec\":{"
             + "\"options\":{\"script\":{\"value\":\"" + escapeJson(script) + "\"}}"
@@ -266,19 +248,10 @@ public class UploadResource {
         return json.getBytes(java.nio.charset.StandardCharsets.UTF_8);
     }
 
-    private String escapeJson(String s) {
-        return s.replace("\\", "\\\\").replace("\"", "\\\"");
-    }
-
     private String buildDosboxConf(String relExe) {
-        // Split into directory and executable components for subdirectory support
-        String dir = "";
-        String exe = relExe;
-        int idx = Math.max(relExe.lastIndexOf('/'), relExe.lastIndexOf('\\'));
-        if (idx >= 0) {
-            dir = relExe.substring(0, idx);
-            exe = relExe.substring(idx + 1);
-        }
+        String parts[] = splitPath(relExe);
+        String dir = parts[0];
+        String exe = parts[1];
 
         return "[sdl]\n"
             + "autolock=true\n"
@@ -314,80 +287,24 @@ public class UploadResource {
     }
 
     /**
-     * Detect Doom-engine games and inject a DEFAULT.CFG with WASD controls.
-     * Searches recursively for DOOM.WAD / DOOM2.WAD in source, then writes
-     * config files to the destination root (where the game will look for them).
+     * Split a DOS path into directory and filename parts.
+     * Handles both backslash and forward-slash separators.
+     * Returns [dir, exe] where dir is empty for root-level files.
      */
-    private void injectDoomConfig(Path srcDir, Path dstDir) throws IOException {
-        boolean hasDoom = false;
-        try (var walk = Files.walk(srcDir)) {
-            hasDoom = walk.anyMatch(p -> {
-                String name = p.getFileName().toString().toUpperCase();
-                return name.equals("DOOM.WAD") || name.equals("DOOM2.WAD");
-            });
+    private String[] splitPath(String path) {
+        int idx = Math.max(path.lastIndexOf('/'), path.lastIndexOf('\\'));
+        if (idx >= 0) {
+            return new String[]{path.substring(0, idx), path.substring(idx + 1)};
         }
-        if (!hasDoom) {
-            LOG.info("No Doom WAD found in upload");
-            return;
-        }
-        LOG.info("Doom detected — injecting WASD config");
-        byte[] cfg = buildDoomDefaultCfg();
-        Files.write(dstDir.resolve("DEFAULT.CFG"), cfg);
-        // Doom II also reads DOOM2.CFG (game-specific, takes priority over DEFAULT)
-        Files.write(dstDir.resolve("DOOM2.CFG"), cfg);
-        LOG.info("Injected DEFAULT.CFG + DOOM2.CFG with WASD controls");
+        return new String[]{"", path};
     }
 
-    /**
-     * Build a DEFAULT.CFG (Doom engine config) with WASD controls.
-     * Only called when a DOOM.WAD or DOOM2.WAD is detected in the upload.
-     *
-     * Key bindings:
-     *   W=forward, S=backward, A=strafe left, D=strafe right
-     *   Arrows=turn, Ctrl=fire, Space=use, Alt=strafe, Shift=run
-     *   Mouse enabled for looking
-     */
-    private byte[] buildDoomDefaultCfg() {
-        // Use CRLF (\r\n) line endings — Doom's config parser uses fgets()
-        // which includes \r in the buffer on DOS. Missing \r can cause parsing issues.
-        String CRLF = "\r\n";
-        String cfg = ""
-            + "mouse_sensitivity\t\t5" + CRLF
-            + "sfx_volume\t\t8" + CRLF
-            + "music_volume\t\t8" + CRLF
-            + "show_messages\t\t1" + CRLF
-            + "key_right\t\t77" + CRLF        // Right arrow — turn right
-            + "key_left\t\t75" + CRLF         // Left arrow  — turn left
-            + "key_up\t\t17" + CRLF           // W — forward
-            + "key_down\t\t31" + CRLF         // S — backward
-            + "key_strafeleft\t\t30" + CRLF   // A — strafe left
-            + "key_straferight\t\t32" + CRLF  // D — strafe right
-            + "key_fire\t\t29" + CRLF         // Ctrl — fire
-            + "key_use\t\t57" + CRLF          // Space — use/open
-            + "key_strafe\t\t56" + CRLF       // Alt — strafe (hold)
-            + "key_speed\t\t54" + CRLF        // Shift — run
-            + "use_mouse\t\t1" + CRLF
-            + "mouseb_fire\t\t0" + CRLF
-            + "mouseb_strafe\t\t1" + CRLF
-            + "mouseb_forward\t\t2" + CRLF
-            + "use_joystick\t\t0" + CRLF
-            + "joyb_fire\t\t0" + CRLF
-            + "joyb_strafe\t\t1" + CRLF
-            + "joyb_use\t\t3" + CRLF
-            + "joyb_speed\t\t2" + CRLF
-            + "screenblocks\t\t10" + CRLF
-            + "detaillevel\t\t0" + CRLF
-            + "showmessages\t\t1" + CRLF
-            + "comport\t\t1" + CRLF
-            + "snd_channels\t\t3" + CRLF
-            + "snd_musicdevice\t\t3" + CRLF
-            + "snd_sfxdevice\t\t3" + CRLF
-            + "snd_sbport\t\t544" + CRLF
-            + "snd_sbirq\t\t7" + CRLF
-            + "snd_sbdma\t\t1" + CRLF;
-        return cfg.getBytes(java.nio.charset.StandardCharsets.US_ASCII);
+    private String escapeJson(String s) {
+        return s.replace("\\", "\\\\").replace("\"", "\\\"");
     }
 
+    // ─── File Utilities ──────────────────────────────────────────
+
     private double dirSizeMB(Path dir) throws IOException {
         long[] total = {0};
         Files.walkFileTree(dir, new SimpleFileVisitor<>() {