docs: Remove the test account name from the public repo

The account name identifies a real, seeded account on the instance;
the public source doesn't need it to make sense. Credentials were
never in the repo and still live only in sops.

BACKLOG.md

@@ -51,7 +51,7 @@ focus colors, always-focusable Sign in with inline validation. Deferred from rev
 - Release build: enable `minifyEnabled` + R8 rules, decide on signing, versioning scheme.
 - Verify `searchTarget=local` channel search behaves well for instances without
   federation; consider `search/video-channels` endpoint as an alternative.
-- (Verified 2026-10-10 via the test account account) history subscriptions + watching endpoints
+- (Verified 2026-10-10 via the test account) history subscriptions + watching endpoints
   behave as documented; upload seeding uses **flat multipart form fields** on
   `/api/v1/videos/upload` (legacy), not a metadata JSON part — only relevant for
   seeding test data, the app itself doesn't upload.

TESTS.md

@@ -13,10 +13,11 @@ when everything passes (playback, focus and UI states are untestable by script).
 ## Test environment / prerequisites
 
 - Instance: any PeerTube (baseline: <https://tube.jeena.net>, v8.3.1, media on R2 object storage).
-- Account: `the test account` (sops: `~/.agents/secrets/jtube.env`). Credentials resolved
+- Account: a dedicated test account (credentials via sops from `~/.agents/secrets/jtube.env`).
+  Credentials resolved
   at login; **do not store the password in the device during tests** — it's typed once
   on the setup screen (which is exactly feature 0).
-- Seeded content (tagged `jtube-tv-test`, channel `the test channel`):
+- Seeded content (tagged `jtube-tv-test`, in the test account's channel):
   - `JTube TV Test 1 - Sintel Teaser` **Private** (~52 s)
   - `JTube TV Test 2 - Caminandes Llamigos` **Private** (~2:30)
   - `JTube TV Test 3 - Cosmos Laundromat` **Private** (~50 s)
@@ -57,7 +58,7 @@ APK version + device.
 - [ ] T9 Long video title truncates (2 lines max) without breaking the row layout; long channel names truncate.
 
 ### 2 — Channels
-- [ ] T10 "Channels" lists account's own channels (`the test channel`), avatar when present, video count.
+- [ ] T10 "Channels" lists the account's own channels, avatar when present, video count.
 - [ ] T11 Click channel → that channel's videos list; open and play one; back returns to the channel's list (not the channels screen lost state).
 - [ ] T12 Remote channel via direct handle is out of MVP scope, but local-channel search (when implemented) must be re-tested: `searchTarget=local` ignores federated results.