fix: raise citation markers and stop adjacent ones merging (#22)

docs/superpowers/specs/2026-10-07-source-citations-design.md

@@ -67,9 +67,18 @@ would have been asked are recorded here instead.
   line; a citation list is part of the answer's credibility.
 - **A4. The copied conversation includes the list**, in the same form, so
   provenance survives a paste into a document.
-- **A5. The marker is `[1]`, not a superscript.** A superscript inside a link is
-  a smaller target and, at this pane width, harder to read than the bracket form
-  that is already the convention in most model output.
+- **A5. The marker in a sentence is a superscript, and the list keeps the plain
+  number.** The model still writes `[1]`; the window draws it raised, as `[¹]`, and
+  the entry under the answer reads `[1] Title` at normal size, where scanning a list
+  matters more than convention. This reverses an earlier decision that markers stay
+  at baseline, taken on the grounds that a raised marker is a smaller target; the
+  user asked for the raised form after reading the first version, and the target is
+  the same width in practice because only the digits are raised.
+- **A6. Superscripts are Unicode digits, not a `<sup>` tag.** The label of a markdown
+  link is plain text that no pass can break, while inline HTML inside a label asks
+  the sanitizer, the parser and Qt to agree about something this repository cannot
+  test. Digits are raised by design in every font, so the mark still reads correctly
+  when a font lacks the rarer glyphs and Qt falls back for them.
 
 ## Design
 
@@ -152,7 +161,11 @@ The pass follows the rules the rest of the pipeline already follows.
 
 - **Prose only.** Fenced segments and code spans are skipped, using the same
   machinery the maths pass uses. A `[1]` inside a snippet is text.
-- **`[n]`, `[^n]` and comma lists** (`[1, 3]`) are recognised.
+- **`[n]`, `[^n]`, comma lists, and runs.** `[1, 3]` is two sources inside one
+  marker, and `[1][2]` is two markers written touching. Both are drawn as raised
+  digits separated by a comma, because `¹²` reads as a single number and leaves the
+  reader no way to tell where one citation ends, which is a defect the first version
+  of this shipped with.
 - **All or nothing.** A marker is linked only when every index it names is a
   known source. `[1, 9]` where 9 was never seen stays exactly as written, rather
   than becoming half a link.