deploy webservice static-file routing for docsite folder URLs, per-instance step-cache db, and constant-height panel title bars.

App/wwwroot/HiAPI-docsite/api/Hi.NcParsers.PostLogicSyntaxs.html

@@ -101,7 +101,14 @@ if the current block has no section for that key, deep-clone the same
 section from the immediately previous block (which is itself guaranteed
 to carry it because every block is processed by this syntax) and set
 <a class="xref" href="Hi.NcParsers.Syntaxs.SyntaxStageKeys.html#Hi_NcParsers_Syntaxs_SyntaxStageKeys_AddedByKey">AddedByKey</a> = <a class="xref" href="Hi.NcParsers.PostLogicSyntaxs.ModalCarrySyntax.html#Hi_NcParsers_PostLogicSyntaxs_ModalCarrySyntax_AddedByValue">AddedByValue</a>
-inside the cloned section. Lets every block stand alone with its full
+inside the cloned section. For each key in <a class="xref" href="Hi.NcParsers.PostLogicSyntaxs.ModalCarrySyntax.html#Hi_NcParsers_PostLogicSyntaxs_ModalCarrySyntax_MergeKeys">MergeKeys</a>, a
+block that DID write its own (partial) section additionally receives the
+previous block's remaining entries — the block's own values win, only
+missing keys are filled — so a partially-written modal section (e.g. an
+XYZ-only motion block's
+<a class="xref" href="Hi.NcParsers.Keywords.IMachineCoordinateStateDef.html#Hi_NcParsers_Keywords_IMachineCoordinateStateDef_MachineCoordinateState">MachineCoordinateState</a>,
+which lacks the rotary axes) does not break the carry chain for the keys
+it did not write. Lets every block stand alone with its full
 modal context, so downstream readers (cache-file dumps, semantics, UI
 jumping to a single block) do not need
 <a class="xref" href="Hi.Common.Collections.LazyLinkedListNode-1.html#Hi_Common_Collections_LazyLinkedListNode_1_EnumerateBack">EnumerateBack()</a> to resolve modal state.</p>