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marketing/facebook: the phone check ran after all — the cover IS cut on phones (R-919)
Your suggestion to use DevTools device mode was right; "cannot be checked" was
too quick a conclusion. On an emulated Pixel 9 (412x924, mobile UA, with a
reload so Facebook serves the mobile bundle) the Page's mobile header renders
412x274 = 1.504:1. Facebook keeps the cover's full height and shows only the
centre 938 px of its 1640 px width -- 351 px off each side. build.py's safe
area leaves 306 px clear per side, 45 px too few, and the light text in
cover-c.png runs x333..x997 against a left crop edge of x351, so 18 px are lost:
the headline reads "aját szabályaid" and the wordmark "elhom.eu" on every phone.

Nothing re-cropped on Facebook (the task's fence). The fix is build.py's safe
area (<=938 px, ~900 for margin) plus the measured 172 px centred phone profile
circle, then a hand re-upload. R-919 opened; R-918 closed and moved to
CLOSED-ITEMS with the recipe that made the check possible.

Meta's help page is wrong about Meta's own rendering: it states 2.4:1 for the
mobile cover where the header measures 1.504:1, so this session's first-pass
arithmetic -- explicitly labelled arithmetic, not a check -- under-predicted the
crop about fivefold. That is recorded rather than quietly deleted.

Also: the evidence secret scan needed --exclude=README.md, because that README
quotes the search strings and was matching itself (4 false EAA hits, 1 false
access_token); with the exclusion, control 1 -> 0 and no real hit. And the
Business & legal section header was already miscounted before this session
(said 9/P2 4, actually held 10/P2 5) -- corrected; five other section headers
drift too and are named in the report, left for a session that owns the register.
2026-10-08 21:50:57 +02:00

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# marketing — CHANGELOG
## facebook — the Page's settings set by hand, and Meta's size page read first-hand (2026-10-08, evening)
Ran `marketing/facebook/TASK-page-setup-windows.md` from the Windows workstation through Claude in Chrome.
Evidence: `documentation/audits/facebook-page-setup-2026-10-08/`; report: `REPORT-facebook-page-setup.md`.
- **Done, each read back from a different channel than the edit.** Intro → `COPY.md` §1 (Graph `about` now
hex-equal to §1, 99 chars); action button → „További információ" at `https://felhom.eu/`; Messenger welcome
→ `COPY.md` §3, hex-equal, automation **on**; Page username → **`felhom.eu`**, so the Page now answers at
`facebook.com/felhom.eu` (Graph `username` confirms it). The operator typed the password Facebook demanded
for the username; nothing else needed a human.
- **Not done — `COPY.md` §2 has no field to go in.** Facebook's current Pages experience has no
long-description field anywhere, and the Graph `description` reads `null` and is not writable with the
robot key's scopes. Filed **R-917** with four options; §2 stays in `COPY.md` unused. `facebook/README.md`'s
„What goes where" row says so.
- **`facebook/README.md` sizes grade: „READ, second-hand" → „READ, Meta's help page" — and the comparison
went the other way.** Meta's page (facebook.com/help/125379114252045, quoted verbatim in the audit) carries
**none** of the 820 x 312 / 640 x 360 figures the section asserted; only the 176 px profile size matched,
and Meta's mobile profile overlap is ~40 px where we assumed 24. Meta's own page contradicts itself (16:9
on a computer, 2,4:1 on a phone, one 2,70:1 file recommended for both). What we build is unchanged.
- **Measured on the live Page at a 1435 px viewport: fine.** The cover renders whole — no crop, no distortion
— the container caps at 1250 px, and the profile circle sits 16 px clear below the cover.
- **Measured on an emulated Pixel 9: the cover is CUT on phones (R-919).** The mobile Page header is
412 x 274 = **1,504:1**, so Facebook shows only the **centre 938 px of the cover's 1640 px width** — 351 px
off each side. `build.py`'s safe area leaves 306 px clear per side, **45 px too few**, so 18 px of the text
is lost: the headline reads „aját szabályaid" and the wordmark „elhom.eu" on every phone. Nothing was
re-cropped on Facebook; the fix is `build.py`'s safe area (≤ 938 px, ~900 for margin) plus the measured
172 px centred phone profile circle, then the operator re-uploads. **Meta's own page is wrong about Meta's
own rendering** — it states 2,4:1 for the mobile cover where the header measures 1,504:1, so the first-pass
arithmetic built on Meta's figure under-predicted the crop about fivefold.
- **How to see Facebook's phone layout** (it cost several wrong turns, recipe in the audit README): narrowing
the window never works — `www.facebook.com` has a minimum width and only grows a horizontal scrollbar, and
`m.facebook.com` redirects to `www` under a desktop user agent. DevTools device mode with a device chosen
**and then a reload** does it; without the reload the already-booted desktop bundle stays (content 901 px
wide in a 412 px viewport). `www` then hangs on the splash under the mobile agent — `m.facebook.com` loads.
- **Gotcha, fixed in the session, no row.** In Business Suite the automatic-reply editor refused the first
save with „A módosítás nincs mentve." **and still created the automation and switched it on — carrying
Meta's default Hungarian greeting, not ours.** A red error toast was therefore a partial write. Reopening
the now-existing automation, pasting §3 again and saving gave „Mentve."; the reopened automation reads back
hex-equal. Anyone editing this screen must reopen it and read the text back, not trust either toast.
- Nothing was posted; no ad, no boost, no Meta Verified; the Meta app stays in development mode.
## facebook — the Page's pictures and texts (2026-10-08)
- `marketing/facebook/build.py` (Pillow only) makes `out/profile-dark.png` + `out/profile-white.png` (932 x 932, the
logo PNG placed unscaled), three covers `out/cover-{a,b,c}.png` (1640 x 624) and `out/preview.html` (self-contained).
Checks in the build: profile circle (today's shape 6823 pixels outside radius 0.42 x width → new pictures 0), cover
safe area + profile-circle clearance (content layer only), sizes read back from the files. The site's tokens and font.
- `COPY.md`: intro (99 of 100 characters), long description, Messenger welcome, three first posts — each claim cites its
website page; no price.
- Fixed in the session: covers B and C first failed the safe-area check (text in the phone profile circle's corner, the
frame past the phone crop) and were moved; `logo.svg` renders with the wrong lettering here, so the PNG is the master
(R-916).