Trim bake_landing comments: one-home the collapse rationale, fix a ragged header wrap

Also notes why staged.collapsed goes unread at its read site, so a future
reader won't file it as a bug.

src/shell/capture/bake_landing.cpp

@@ -85,10 +85,9 @@ PreparedLanding prepareLanding(ReaSamplerSession& session, const std::string& pr
                                   "the staged render was unreadable", request.generation);
         return prep;
     }
-    // The lossless mono collapse, taken BEFORE the hash and before every measurement below,
+    // Before the hash, so nothing measures a buffer it won't write.
-    // so the entry's channel count, its content hash, and the bytes commitLanding writes are
+    // `staged.collapsed` goes unread: a rebuild that fails to reparse reverts to the
-    // all read off one buffer. A dead-center render is exactly the dual-mono shape the shared
+    // staged bytes inside applyMonoCollapse itself, so there is nothing left here to react to.
-    // predicate folds; anything else comes back byte-for-byte as it was staged.
     CollapsedWav staged = applyMonoCollapse(std::move(prep.bytes));
     prep.bytes = std::move(staged.bytes);
     const WavLayout layout = staged.layout;

src/shell/capture/bake_landing.h

@@ -1,9 +1,9 @@
 #pragma once
 // bake_landing — landing ONE bake request into the loaded project's bank: read the staged
 // WAV, collapse it losslessly to mono when it is dual-mono, hash it, resolve replace-vs-add,
-// write the file, index it, seed its lineage. The scan
+// write the file, index it, seed its lineage. The scan pass that finds requests across the
-// pass that finds requests across the open tabs and answers them is `bake_land`; this is
+// open tabs and answers them is `bake_land`; this is what it calls per request, and it
-// what it calls per request, and it neither reads nor writes an ext-state key.
+// neither reads nor writes an ext-state key.
 
 #include <cstdint>
 #include <string>