fix(brand): set the small-size variant's S in Medium

The tab icon carries the initials rather than the two-line wordmark
because the wordmark stops resolving below 32px, but it kept the
wordmark's weights, and those do not survive the size either. The S is
ExtraLight against the P's SemiBold: a 0.90 stem against 3.40, which at
16px is a quarter of a pixel against most of one. The pair rasterised to
a P with a smudge beside it, the S reaching no solid pixel at all at 16
or 32.

It is Medium now. That gives up the Self/Post weight play inside this
one variant, which is the right trade: the contrast needs more pixels
than the variant exists to work in, and the variants big enough to carry
it keep it.

The outlines come from IBM Plex Sans as before, at the same font-size
26, letter-spacing -1 and baseline — only the S's weight moved, and the
pair re-centres on its advances the way live text would, which shifts
the P 0.57 right. The reconstruction was checked by regenerating the
committed ExtraLight/SemiBold outlines from the same pipeline first;
they came back identical, so the new S is the font's, not a thickened
copy of the old one. A stroke was tried before the font was to hand and
is not what shipped: it thickens uniformly, where Medium is modulated at
the joins and keeps the apertures open, which is visible by 64px.

favicon.png is regenerated from the same source. Its border is unchanged
to the pixel and its alpha to the count; only the lettering moved.

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

CHANGELOG.md

@@ -52,6 +52,16 @@ Format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/); version
 
 ### Changed
 
+- The mark's small-size variant — the tab icon and the `SP` initials it
+  carries — sets its S in Medium where the wordmark sets it in ExtraLight.
+  Against the P's SemiBold the ExtraLight S is a 0.90 stem against 3.40,
+  which at 16px is a quarter of a pixel against most of one, so the pair
+  rasterised to a P with a smudge beside it. Medium gives up the
+  Self/Post weight play, which needs more pixels than this variant exists
+  to work in, in exchange for both letters being there. The variants big
+  enough to carry the contrast keep it. `favicon.png` is regenerated to
+  match, and the outlines are IBM Plex Sans as before — the same
+  font-size, letter-spacing and baseline, with only the S's weight moved.
 - The stamp's `SELF-HOSTED SMTP RELAY` line is set at 11.5/0.15 instead of
   7.2/2.8, and no longer carries `opacity=".78"`. At the old size its stems
   rasterised to about half a device pixel, so more than half its ink landed

docs/assets/selfpost-icon-16.svg

@@ -1,8 +1,14 @@
 <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64" width="64" height="64" role="img" aria-label="SelfPost">
 <!-- SelfPost · https://github.com/mixeme/selfpost · AGPL-3.0
      Wordmark set in IBM Plex Sans (OFL) and converted to outlines: the
-     file needs no font installed to render as drawn. -->
+     file needs no font installed to render as drawn.
+     This is the mark's small-size variant, and its S is Medium where the
+     wordmark's is ExtraLight. At the wordmark's weights the S stem is
+     0.90 against the P's 3.40, which at 16px is a quarter of a pixel
+     against most of one: the pair rasterised to a P with a smudge beside
+     it. Medium costs the Self/Post weight play, which needs more pixels
+     than this variant exists to work in, and keeps both letters. -->
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 <rect x="11" y="11" width="42" height="42" fill="#7A3B2E" />
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 </svg>

docs/assets/selfpost-proof.html

@@ -170,7 +170,7 @@
      Шрифт: IBM Plex Sans (OFL). Перед публикацией текст перевести в контуры. -->
 <path d="M7.80 5.00 L13.00 5.00 A2.8 2.8 0 0 0 18.60 5.00 L23.80 5.00 A2.8 2.8 0 0 0 29.40 5.00 L34.60 5.00 A2.8 2.8 0 0 0 40.20 5.00 L45.40 5.00 A2.8 2.8 0 0 0 51.00 5.00 L56.20 5.00 A2.8 2.8 0 0 0 59.00 7.80 L59.00 13.00 A2.8 2.8 0 0 0 59.00 18.60 L59.00 23.80 A2.8 2.8 0 0 0 59.00 29.40 L59.00 34.60 A2.8 2.8 0 0 0 59.00 40.20 L59.00 45.40 A2.8 2.8 0 0 0 59.00 51.00 L59.00 56.20 A2.8 2.8 0 0 0 56.20 59.00 L51.00 59.00 A2.8 2.8 0 0 0 45.40 59.00 L40.20 59.00 A2.8 2.8 0 0 0 34.60 59.00 L29.40 59.00 A2.8 2.8 0 0 0 23.80 59.00 L18.60 59.00 A2.8 2.8 0 0 0 13.00 59.00 L7.80 59.00 A2.8 2.8 0 0 0 5.00 56.20 L5.00 51.00 A2.8 2.8 0 0 0 5.00 45.40 L5.00 40.20 A2.8 2.8 0 0 0 5.00 34.60 L5.00 29.40 A2.8 2.8 0 0 0 5.00 23.80 L5.00 18.60 A2.8 2.8 0 0 0 5.00 13.00 L5.00 7.80 A2.8 2.8 0 0 0 7.80 5.00 Z" fill="#F3EDE1" stroke="#12161C" stroke-width="0.8" stroke-linejoin="round"/>
 <rect x="11" y="11" width="42" height="42" fill="#7A3B2E"/>
-<text x="32" y="43" text-anchor="middle" font-family="'IBM Plex Sans','Helvetica Neue',sans-serif" font-size="26" letter-spacing="-1" fill="#F6EDE2"><tspan font-weight="200">S</tspan><tspan font-weight="600">P</tspan></text>
+<text x="32" y="43" text-anchor="middle" font-family="'IBM Plex Sans','Helvetica Neue',sans-serif" font-size="26" letter-spacing="-1" fill="#F6EDE2"><tspan font-weight="500">S</tspan><tspan font-weight="600">P</tspan></text>
 </svg><span>SelfPost — Domains</span></div>
         <div class="tab off"><svg class="" viewBox="0 0 64 64" width="64" height="64" role="img" aria-label="SelfPost">
 <!-- SelfPost · https://github.com/mixeme/selfpost · AGPL-3.0
@@ -188,7 +188,7 @@
       <div class="avs">
         <img class="av" width="80" height="80" alt="" src="data:image/svg+xml;utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64' width='64' height='64' role='img' aria-label='SelfPost'%3E%3C!-- SelfPost · https://github.com/mixeme/selfpost · AGPL-3.0     Шрифт: IBM Plex Sans (OFL). Перед публикацией текст перевести в контуры. --%3E%3Cpath d='M7.90 6.00 L10.60 6.00 A1.9 1.9 0 0 0 14.40 6.00 L17.10 6.00 A1.9 1.9 0 0 0 20.90 6.00 L23.60 6.00 A1.9 1.9 0 0 0 27.40 6.00 L30.10 6.00 A1.9 1.9 0 0 0 33.90 6.00 L36.60 6.00 A1.9 1.9 0 0 0 40.40 6.00 L43.10 6.00 A1.9 1.9 0 0 0 46.90 6.00 L49.60 6.00 A1.9 1.9 0 0 0 53.40 6.00 L56.10 6.00 A1.9 1.9 0 0 0 58.00 7.90 L58.00 10.60 A1.9 1.9 0 0 0 58.00 14.40 L58.00 17.10 A1.9 1.9 0 0 0 58.00 20.90 L58.00 23.60 A1.9 1.9 0 0 0 58.00 27.40 L58.00 30.10 A1.9 1.9 0 0 0 58.00 33.90 L58.00 36.60 A1.9 1.9 0 0 0 58.00 40.40 L58.00 43.10 A1.9 1.9 0 0 0 58.00 46.90 L58.00 49.60 A1.9 1.9 0 0 0 58.00 53.40 L58.00 56.10 A1.9 1.9 0 0 0 56.10 58.00 L53.40 58.00 A1.9 1.9 0 0 0 49.60 58.00 L46.90 58.00 A1.9 1.9 0 0 0 43.10 58.00 L40.40 58.00 A1.9 1.9 0 0 0 36.60 58.00 L33.90 58.00 A1.9 1.9 0 0 0 30.10 58.00 L27.40 58.00 A1.9 1.9 0 0 0 23.60 58.00 L20.90 58.00 A1.9 1.9 0 0 0 17.10 58.00 L14.40 58.00 A1.9 1.9 0 0 0 10.60 58.00 L7.90 58.00 A1.9 1.9 0 0 0 6.00 56.10 L6.00 53.40 A1.9 1.9 0 0 0 6.00 49.60 L6.00 46.90 A1.9 1.9 0 0 0 6.00 43.10 L6.00 40.40 A1.9 1.9 0 0 0 6.00 36.60 L6.00 33.90 A1.9 1.9 0 0 0 6.00 30.10 L6.00 27.40 A1.9 1.9 0 0 0 6.00 23.60 L6.00 20.90 A1.9 1.9 0 0 0 6.00 17.10 L6.00 14.40 A1.9 1.9 0 0 0 6.00 10.60 L6.00 7.90 A1.9 1.9 0 0 0 7.90 6.00 Z' fill='%23F3EDE1' stroke='%2312161C' stroke-width='0.6' stroke-linejoin='round'/%3E%3Crect x='11' y='11' width='42' height='42' fill='%237A3B2E'/%3E%3Ctext x='32' y='31' text-anchor='middle' font-family=''IBM Plex Sans','Helvetica Neue',sans-serif' font-size='14' font-weight='200' letter-spacing='-.4' fill='%23F6EDE2'%3ESelf%3C/text%3E%3Ctext x='32' y='45' text-anchor='middle' font-family=''IBM Plex Sans','Helvetica Neue',sans-serif' font-size='14' font-weight='600' letter-spacing='-.4' fill='%23F6EDE2'%3EPost%3C/text%3E%3C/svg%3E">
         <img class="av" width="48" height="48" alt="" src="data:image/svg+xml;utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64' width='64' height='64' role='img' aria-label='SelfPost'%3E%3C!-- SelfPost · https://github.com/mixeme/selfpost · AGPL-3.0     Шрифт: IBM Plex Sans (OFL). Перед публикацией текст перевести в контуры. --%3E%3Cpath d='M7.90 6.00 L10.60 6.00 A1.9 1.9 0 0 0 14.40 6.00 L17.10 6.00 A1.9 1.9 0 0 0 20.90 6.00 L23.60 6.00 A1.9 1.9 0 0 0 27.40 6.00 L30.10 6.00 A1.9 1.9 0 0 0 33.90 6.00 L36.60 6.00 A1.9 1.9 0 0 0 40.40 6.00 L43.10 6.00 A1.9 1.9 0 0 0 46.90 6.00 L49.60 6.00 A1.9 1.9 0 0 0 53.40 6.00 L56.10 6.00 A1.9 1.9 0 0 0 58.00 7.90 L58.00 10.60 A1.9 1.9 0 0 0 58.00 14.40 L58.00 17.10 A1.9 1.9 0 0 0 58.00 20.90 L58.00 23.60 A1.9 1.9 0 0 0 58.00 27.40 L58.00 30.10 A1.9 1.9 0 0 0 58.00 33.90 L58.00 36.60 A1.9 1.9 0 0 0 58.00 40.40 L58.00 43.10 A1.9 1.9 0 0 0 58.00 46.90 L58.00 49.60 A1.9 1.9 0 0 0 58.00 53.40 L58.00 56.10 A1.9 1.9 0 0 0 56.10 58.00 L53.40 58.00 A1.9 1.9 0 0 0 49.60 58.00 L46.90 58.00 A1.9 1.9 0 0 0 43.10 58.00 L40.40 58.00 A1.9 1.9 0 0 0 36.60 58.00 L33.90 58.00 A1.9 1.9 0 0 0 30.10 58.00 L27.40 58.00 A1.9 1.9 0 0 0 23.60 58.00 L20.90 58.00 A1.9 1.9 0 0 0 17.10 58.00 L14.40 58.00 A1.9 1.9 0 0 0 10.60 58.00 L7.90 58.00 A1.9 1.9 0 0 0 6.00 56.10 L6.00 53.40 A1.9 1.9 0 0 0 6.00 49.60 L6.00 46.90 A1.9 1.9 0 0 0 6.00 43.10 L6.00 40.40 A1.9 1.9 0 0 0 6.00 36.60 L6.00 33.90 A1.9 1.9 0 0 0 6.00 30.10 L6.00 27.40 A1.9 1.9 0 0 0 6.00 23.60 L6.00 20.90 A1.9 1.9 0 0 0 6.00 17.10 L6.00 14.40 A1.9 1.9 0 0 0 6.00 10.60 L6.00 7.90 A1.9 1.9 0 0 0 7.90 6.00 Z' fill='%23F3EDE1' stroke='%2312161C' stroke-width='0.6' stroke-linejoin='round'/%3E%3Crect x='11' y='11' width='42' height='42' fill='%237A3B2E'/%3E%3Ctext x='32' y='31' text-anchor='middle' font-family=''IBM Plex Sans','Helvetica Neue',sans-serif' font-size='14' font-weight='200' letter-spacing='-.4' fill='%23F6EDE2'%3ESelf%3C/text%3E%3Ctext x='32' y='45' text-anchor='middle' font-family=''IBM Plex Sans','Helvetica Neue',sans-serif' font-size='14' font-weight='600' letter-spacing='-.4' fill='%23F6EDE2'%3EPost%3C/text%3E%3C/svg%3E">
-        <img class="av" width="32" height="32" alt="" src="data:image/svg+xml;utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64' width='64' height='64' role='img' aria-label='SelfPost'%3E%3C!-- SelfPost · https://github.com/mixeme/selfpost · AGPL-3.0     Шрифт: IBM Plex Sans (OFL). Перед публикацией текст перевести в контуры. --%3E%3Cpath d='M7.80 5.00 L13.00 5.00 A2.8 2.8 0 0 0 18.60 5.00 L23.80 5.00 A2.8 2.8 0 0 0 29.40 5.00 L34.60 5.00 A2.8 2.8 0 0 0 40.20 5.00 L45.40 5.00 A2.8 2.8 0 0 0 51.00 5.00 L56.20 5.00 A2.8 2.8 0 0 0 59.00 7.80 L59.00 13.00 A2.8 2.8 0 0 0 59.00 18.60 L59.00 23.80 A2.8 2.8 0 0 0 59.00 29.40 L59.00 34.60 A2.8 2.8 0 0 0 59.00 40.20 L59.00 45.40 A2.8 2.8 0 0 0 59.00 51.00 L59.00 56.20 A2.8 2.8 0 0 0 56.20 59.00 L51.00 59.00 A2.8 2.8 0 0 0 45.40 59.00 L40.20 59.00 A2.8 2.8 0 0 0 34.60 59.00 L29.40 59.00 A2.8 2.8 0 0 0 23.80 59.00 L18.60 59.00 A2.8 2.8 0 0 0 13.00 59.00 L7.80 59.00 A2.8 2.8 0 0 0 5.00 56.20 L5.00 51.00 A2.8 2.8 0 0 0 5.00 45.40 L5.00 40.20 A2.8 2.8 0 0 0 5.00 34.60 L5.00 29.40 A2.8 2.8 0 0 0 5.00 23.80 L5.00 18.60 A2.8 2.8 0 0 0 5.00 13.00 L5.00 7.80 A2.8 2.8 0 0 0 7.80 5.00 Z' fill='%23F3EDE1' stroke='%2312161C' stroke-width='0.8' stroke-linejoin='round'/%3E%3Crect x='11' y='11' width='42' height='42' fill='%237A3B2E'/%3E%3Ctext x='32' y='43' text-anchor='middle' font-family=''IBM Plex Sans','Helvetica Neue',sans-serif' font-size='26' letter-spacing='-1' fill='%23F6EDE2'%3E%3Ctspan font-weight='200'%3ES%3C/tspan%3E%3Ctspan font-weight='600'%3EP%3C/tspan%3E%3C/text%3E%3C/svg%3E">
+        <img class="av" width="32" height="32" alt="" src="data:image/svg+xml;utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64' width='64' height='64' role='img' aria-label='SelfPost'%3E%3C!-- SelfPost · https://github.com/mixeme/selfpost · AGPL-3.0     Шрифт: IBM Plex Sans (OFL). Перед публикацией текст перевести в контуры. --%3E%3Cpath d='M7.80 5.00 L13.00 5.00 A2.8 2.8 0 0 0 18.60 5.00 L23.80 5.00 A2.8 2.8 0 0 0 29.40 5.00 L34.60 5.00 A2.8 2.8 0 0 0 40.20 5.00 L45.40 5.00 A2.8 2.8 0 0 0 51.00 5.00 L56.20 5.00 A2.8 2.8 0 0 0 59.00 7.80 L59.00 13.00 A2.8 2.8 0 0 0 59.00 18.60 L59.00 23.80 A2.8 2.8 0 0 0 59.00 29.40 L59.00 34.60 A2.8 2.8 0 0 0 59.00 40.20 L59.00 45.40 A2.8 2.8 0 0 0 59.00 51.00 L59.00 56.20 A2.8 2.8 0 0 0 56.20 59.00 L51.00 59.00 A2.8 2.8 0 0 0 45.40 59.00 L40.20 59.00 A2.8 2.8 0 0 0 34.60 59.00 L29.40 59.00 A2.8 2.8 0 0 0 23.80 59.00 L18.60 59.00 A2.8 2.8 0 0 0 13.00 59.00 L7.80 59.00 A2.8 2.8 0 0 0 5.00 56.20 L5.00 51.00 A2.8 2.8 0 0 0 5.00 45.40 L5.00 40.20 A2.8 2.8 0 0 0 5.00 34.60 L5.00 29.40 A2.8 2.8 0 0 0 5.00 23.80 L5.00 18.60 A2.8 2.8 0 0 0 5.00 13.00 L5.00 7.80 A2.8 2.8 0 0 0 7.80 5.00 Z' fill='%23F3EDE1' stroke='%2312161C' stroke-width='0.8' stroke-linejoin='round'/%3E%3Crect x='11' y='11' width='42' height='42' fill='%237A3B2E'/%3E%3Ctext x='32' y='43' text-anchor='middle' font-family=''IBM Plex Sans','Helvetica Neue',sans-serif' font-size='26' letter-spacing='-1' fill='%23F6EDE2'%3E%3Ctspan font-weight='500'%3ES%3C/tspan%3E%3Ctspan font-weight='600'%3EP%3C/tspan%3E%3C/text%3E%3C/svg%3E">
       </div>
       <div class="cap"><b>80 / 48 / 32 px</b><br>Аватар организации на GitHub. Порог перехода на версию SP — 32 px.</div>
     </div>

internal/web/static/favicon.svg

@@ -1,8 +1,14 @@
 <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64" width="64" height="64" role="img" aria-label="SelfPost">
 <!-- SelfPost · https://github.com/mixeme/selfpost · AGPL-3.0
      Wordmark set in IBM Plex Sans (OFL) and converted to outlines: the
-     file needs no font installed to render as drawn. -->
+     file needs no font installed to render as drawn.
+     This is the mark's small-size variant, and its S is Medium where the
+     wordmark's is ExtraLight. At the wordmark's weights the S stem is
+     0.90 against the P's 3.40, which at 16px is a quarter of a pixel
+     against most of one: the pair rasterised to a P with a smudge beside
+     it. Medium costs the Self/Post weight play, which needs more pixels
+     than this variant exists to work in, and keeps both letters. -->
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