fix(scripts): stop m3-touch-targets.py reading comments as code

A KDoc line on the dialect picker's row composable, explaining that it used
`Card(onClick = …)` rather than a `Modifier.clickable`, was counted as a bare
clickable chain. The budget is zero, so a sentence about the rule broke
`./gradlew check`. The comment was reworded to get around it, which was the wrong
fix -- the sentence was right -- and it is restored here.

Not a new rule. m3-spacing-positions.py skips `\s*(//|\*|/\*)` and
m3-title-case.py skips the same three prefixes as a startswith tuple; only this
checker was missing the two block-comment ones, having been written with `//`
alone. m3-audit.sh explains the whole problem at NOT_A_COMMENT, where a note
about a hardcoded colour once counted as a colour.

The same function had the mirror bug, which is the dangerous direction. It looked
for minimumInteractiveComponentSize in a two-line window without stripping
comments, so a comment above a real bare `.clickable` that merely mentioned the
modifier would have excused it. A false positive is noise; a silently excused
offender is a miss. Both lines of the window are now read as code only.

Checked against six cases: a bare clickable is still caught, a guard on the same
line and a guard on the line above still excuse one, a starred KDoc no longer
counts, and a real offender under a comment naming the modifier is now caught.
Counts for the tree are unchanged -- 0 before and after -- which was worth
establishing, since a broken detector would also report zero.

A prefix test rather than block tracking, and the limitation is written on the
function: a `/* ... */ `body line not starting with `*` still reads as code.
There are 539 block comments under ui/ and not one such line, because every KDoc
here stars its body, and three identical rules spelled three ways would be worse
than one limitation on the record.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

docs/scripts/m3-touch-targets.py

@@ -14,6 +14,14 @@ a pointer on desktop has to land on.
 Components that carry their own minimum -- IconButton, Button, Checkbox, ListItem and the
 rest of material3 -- are not `.clickable` call sites and never appear here.
 
+Comments are not code, in either direction. A KDoc line explaining that a row uses a
+clickable `Card` *rather than* a `Modifier.clickable` was counted as a call site, which
+breaks a zero budget and so breaks `./gradlew check`; and a comment above a real call site
+that merely mentions `minimumInteractiveComponentSize` would have excused it. The first is
+noise and the second is a miss, so both lines of the window are read as code only. This is
+the same thing m3-audit.sh's `NOT_A_COMMENT` exists for, spelled as m3-title-case.py
+spells it -- see the note there on a colour comment counting as a colour.
+
 Usage: m3-touch-targets.py [--list]
 """
 import os, re, sys
@@ -21,6 +29,18 @@ import os, re, sys
 UI = 'composeApp/src/commonMain/kotlin/press/mantra/compose/ui'
 
 
+def _is_comment(line):
+    """Whether `line` is a comment line: `//`, or a `/*` block's opener or body.
+
+    A prefix test rather than block tracking, because that is what the other two checkers
+    do and three identical rules spelled three ways is worse than one limitation. The
+    limitation: a `/* ... */` body line that does not start with `*` reads as code. There
+    are 539 block comments under `ui/` and not one such line, since every KDoc here stars
+    its body -- if that ever stops being true, this is the function to make stateful.
+    """
+    return line.lstrip().startswith(('//', '*', '/*'))
+
+
 def offenders():
     found = []
     for root, _, files in os.walk(UI):
@@ -32,11 +52,14 @@ def offenders():
             for i, line in enumerate(lines):
                 if '.clickable' not in line:
                     continue
-                if line.lstrip().startswith('//') or line.startswith('import '):
+                if _is_comment(line) or line.startswith('import '):
                     continue
                 # The modifier may sit on this line or on the one above, since a chain
-                # broken across lines is the common shape.
-                window = '\n'.join(lines[max(0, i - 1):i + 1])
+                # broken across lines is the common shape. Comment lines are dropped from
+                # the window rather than kept: an exemption has to be in the code.
+                window = '\n'.join(
+                    l for l in lines[max(0, i - 1):i + 1] if not _is_comment(l)
+                )
                 if 'minimumInteractiveComponentSize' in window:
                     continue
                 found.append((path, i + 1, line.strip()[:90]))