Add backup chart deltas

dist/urbm-2026.07.13.r005-x86_64-1.txz.sha256

@@ -1 +0,0 @@
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dist/urbm-2026.07.13.r006-x86_64-1.txz.sha256

@@ -0,0 +1 @@
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dist/urbm.plg

@@ -2,13 +2,18 @@
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 <!ENTITY name "urbm">
 <!ENTITY author "Michael Roll">
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+<!ENTITY version "2026.07.13.r006">
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+<!ENTITY packageSHA256 "fbefb46df55f79eb03e1b272295dddb02f3d38ed320eadb7e8bbe8ea3391ec53">
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   <CHANGES>
+### 2026.07.13.r006
+- Show timestamp, job, absolute value, and signed change from the previous run when hovering or focusing chart points.
+- Compare points only with the previous run of the same backup job, including a predecessor just outside the visible seven-day range.
+- Avoid rebuilding an idle dashboard every two seconds so chart tooltips remain stable.
+
 ### 2026.07.13.r005
 - Restore the dashboard backup-size and file-count timelines using completed runs from the last seven days.
 - Plot runs at their actual time and add a backup-job selector that defaults to the most recently used job.