feat(cli): dsh --dump-config / --dump-default-config print the composed tree

dsh --dump-config and dsh web --dump-config compose the shipped base,
the surface overlay, and the --config or personal overlay — exactly the
layers that surface boots — and print the entry list as YAML without
booting; --dump-default-config stops at the surface overlay so the two
outputs diff to precisely the user layer's effect.

The dump shares the mounting code: the vendored include exports its
patch algorithm as applyEntryPatches() and its !!js dialect as
entryListSchema (logged in vendor/README.md), dsh-app-boot's
renderConfigDump() composes and renders through both (and now imports
the dialect instead of duplicating it), and the CLI adds a thin
dump-config mode. !!js expressions print verbatim; unmatched patches
warn on stderr; boot-only flags are rejected alongside the dump flags.

(cherry picked from commit 1fdbebfa8a5dc7df840d53666320064a7e3dae59)

apps/cli/src/bin.ts

@@ -43,6 +43,11 @@ switch (invocation.mode) {
     await runTui(invocation.config, invocation.resume, undefined, undefined, invocation.configReplace)
     break
   }
+  case 'dump-config': {
+    const { runDumpConfig } = await import('./dump-config.ts')
+    runDumpConfig(invocation.surface, invocation.defaultOnly, invocation.config)
+    break
+  }
   case 'meta': {
     const { runMeta } = await import('./tui.ts')
     await runMeta()