i18n: an effect's name draws in the interface language, the generated Effect menu included (#821)

The interface below the menu bar is localized (618 fixed menu entries, ~490 panel rows) but an
effect's name still rendered in English everywhere it appeared: the generated Effect menu, Effect
Controls, the Timeline and Effects & Presets.

The registry's English name is the effect's identity: `effect.list`, `effect.apply {"effect": …}`,
scripts, expressions and the property tree's group name all match on it. Only the drawing changes.

`crates/ui-egui/src/i18n/effects.rs` keys the names by effect **id** rather than by the English
string — a repeat is stored as `Gaussian Blur 2` (an English key would miss it) and upstream
renames a display name now and then, while the id is stable. It carries 306 rows for Simplified
Chinese, one per effect in the registry, taken from the installed After Effects 2026 (26.5.0.89)
Simplified Chinese interface, with the `CC` series following Adobe's Chinese documentation (which
names 68 of the 69 that its interface leaves in English). `Cryptomatte`, `EXtractoR`, `IDentifier`,
`Key Light` and `Unmult` stay in English as brand names; `Face Measurements` and `Face Track
Points` are EffectCraft's own effects. The 21 category folder names are in the same file, worded
after the effect names (channel → 通道, noise → 杂色, matte → 遮罩 …).

What draws the catalog now:

- **Effect menu:** the entries and the category submenus. The command and its `{"effect": <id>}`
  params are untouched, so the menu still applies by id.
- **Effect Controls:** the header, its Rename field, the accessible name and the About popup.
- **Timeline:** effect group rows, and the search (a Chinese interface is searchable in Chinese).
- **Effects & Presets:** the rows, the drag ghost, the folder rows and the search.

Kept as they are: the effect id, the property tree's `PropGroup.name`, every automation id and
label, `effect.list`'s `name`/`category`, and the undo label (`Apply Gaussian Blur`). A name the
user typed in Effect Controls stays verbatim, and a repeated instance keeps the index the engine
appends (`Gaussian Blur 2` → `高斯模糊 2`). No other language has rows yet, Traditional Chinese
included, so those draw the registry's English name.

Tests: nine unit tests under `cargo test -p effectcraft-ui-egui --lib i18n` cover the data (every
effect has a row, the row still carries the registry's English name, ids are unique, only the five
brand names repeat their English name, every category has a row, a row names an effect the registry
knows) and the behaviour (the instance index, user renames, English and untranslated languages,
search) plus a scan pinning the drawing sites. `crates/ui-egui/tests/ui_effect_names.rs` checks the
Effect Controls header, the generated Effect menu and that the ids, automation labels and
`effect.list` stay English.

`docs/localization-parity.md` and `docs/gaps.md` no longer record effect names as deliberately
English; effect *parameter* names are still untranslated and stay the next piece.

Refs #821

docs/gaps.md

@@ -72,7 +72,7 @@ are grouped by area; the issue tracker has the rest.
 | 13 | **3D model formats and materials** | After Effects 26 imports FBX, USD/USDZ, STL besides glTF and OBJ (`usd_plugins`), and Substance 3D materials with mesh displacement (26.0–26.2); we read glTF, OBJ, STL (binary and ASCII, with facet colours) and FBX 7.x (binary and ASCII: meshes, hierarchy, Lambert/Phong materials and textures; no FBX animation or skinning yet) | Product shots and 3D scenes come as FBX/USDZ | 25–45 h | — · [file-format-parity.md](file-format-parity.md) |
 | 14 | **Object Matte** (26.2, disk cache in 26.5) | Not present; MobileSAM is already in `effectcraft-segment` and could back it | The new one-click roto; Roto Brush covers part of it | 15–30 h | G7 · [target-app-parity.md](target-app-parity.md) |
 | 15 | **Hardware video decode and encode** | No VideoToolbox, NVENC, Quick Sync or VA-API; #498 asks for it; FilmCraft has VideoToolbox / NVENC / VA-API paths to borrow | 4K playback and export speed | 25–45 h | G5/G6 · [hardware-parity.md](hardware-parity.md) |
-| 16 | **Localization depth** | Menus in 6 languages; panels in 4; effect names and ~1,650 effect parameter names untranslated; French, German, Korean, Italian, Russian (After Effects ships them) absent; #599 Hangul boxes on macOS | After Effects is used heavily in Japan, China, Korea, Brazil, Europe | 60–110 h + native review | G9 · [localization-parity.md](localization-parity.md) |
+| 16 | **Localization depth** | Menus in 6 languages; panels in 4; effect names translated in Simplified Chinese (306, plus the generated Effect menu), their ~1,650 parameter names untranslated; French, German, Korean, Italian, Russian (After Effects ships them) absent; #599 Hangul boxes on macOS | After Effects is used heavily in Japan, China, Korea, Brazil, Europe | 60–110 h + native review | G9 · [localization-parity.md](localization-parity.md) |
 | 17 | **Media Browser lists files import refuses** | `media_browser.rs` lists AVI; `media::is_importable` has none of them (Targa and Radiance HDR import since #745; DPX and Cineon since #756, log shown as stored: no Cineon Settings conversion yet; MXF OP1a / OP-Atom since #767; FilmCraft has no AVI demuxer); #431 any image imports as a sequence; #324 MP3 goes silent | Confusing failures on common VFX formats | 15–30 h | G6 · [file-format-parity.md](file-format-parity.md) |
 | 18 | **Relative paths and relinking** | Projects store absolute footage paths; no relink when a project moves | Moving or sharing a project breaks it | 6–12 h | G4 · [file-format-parity.md](file-format-parity.md) |
 | 19 | **Plug-in ecosystem** | No After Effects SDK hosting (#600, #327 OpenFX, #334, #376 plug-in manager); our WebAssembly API has no third-party plug-ins | Many pro projects depend on Trapcode, Element, Saber… | 40–80 h for API growth; SDK hosting needs an owner decision | G8 · [scripting-parity.md](scripting-parity.md) |

docs/localization-parity.md

@@ -1,6 +1,6 @@
 # Localization parity
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-11 · **Change:** minor (Ukrainian panel catalog recounted after it caught up with the Chinese ones) · **Target:** Adobe After Effects 2026
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-13 · **Change:** minor (effect names and the generated Effect menu go through a catalog, in Simplified Chinese) · **Target:** Adobe After Effects 2026
 
 How much of EffectCraft's interface is translated, language by language, compared with After
 Effects. [gaps.md](gaps.md) gap 16 and workstream G9 hold the work;
@@ -19,13 +19,22 @@ interface; Arabic and Hebrew text *in layers* is supported through its Middle Ea
 - **Menus:** `crates/ui-egui/src/i18n.rs`, one catalog per language keyed by
   `(command, English label)`. A test (`every_translation_key_exists_in_the_actual_menu_tree`)
   fails if any fixed menu entry is untranslated or a row is stale, so every catalog covers all
-  **618** fixed entries. The generated Effect menu (effect names) is deliberately left in English.
+  **618** fixed entries. The generated Effect menu is not part of that fixed tree: its entries
+  and category submenus take their labels from the effect catalog below.
 - **Panels, dialogs, buttons, tooltips:** `crates/ui-egui/src/i18n/ui.rs`, keyed by the English
   source string, with English fallback. Catalogs exist for Japanese, Simplified and Traditional
   Chinese, Ukrainian and Czech.
-- **Not translated anywhere yet:** effect names and their ≈ 1,650 parameter names
-  (`crates/effects`), engine-generated text (property names, errors, undo labels), the Home
-  screen's unwrapped literals (#574), Learn tutorials and documentation.
+- **Effect names:** `crates/ui-egui/src/i18n/effects.rs`, keyed by **effect id**, in Simplified
+  Chinese (306 rows, one per effect in the registry, plus its 21 categories). The registry's
+  English name stays the effect's identity: `effect.list`, `effect.apply {"effect": …}`, scripts
+  and expressions match on it, and the property tree stores it as the effect group's name. Only
+  the drawing — the Effect menu, Effect Controls, the Timeline and Effects & Presets — goes
+  through the catalog, so a project file is identical whichever interface language opens it.
+  A repeat (`Gaussian Blur 2`) keeps the index the engine appends, and a group the user renamed
+  in Effect Controls stays verbatim. No other language has rows yet, so they draw English.
+- **Not translated anywhere yet:** effect *parameter* names (≈ 1,650, `crates/effects`),
+  engine-generated text (property names, errors, undo labels), the Home screen's unwrapped
+  literals (#574), Learn tutorials and documentation.
 - **Language choice:** Settings ▸ General ▸ Language, or Match System
   (`match_system_uses_the_system_language_where_there_is_a_catalog`).
 - **Fonts:** no bundled CJK font; the UI installs system fallbacks probed by script (Kana, Han,
@@ -48,7 +57,7 @@ the true percentages are slightly lower.
 | Language | Code | UI strings translated | Dialogs / tooltips / help | Script support | Native review | Status | To `full` |
 |---|---|---|---|---|---|---|---|
 | English | `en` | ≈ 3,900 (100%, source) | All; docs in English | — | yes | full | — |
-| Simplified Chinese | `zh-hans` | 1,081 (≈ 28%): menus 618/618, panels 463 | Panels and dialogs partly (≈ 35% of panel strings); no help, effects untranslated; Home screen literals unwrapped (#574) | System CJK fallback; Han follows the UI language; CJK text in comps renders wrongly (#453); IME in text layers | no | partial | 6–9 h + review |
+| Simplified Chinese | `zh-hans` | 1,081 (≈ 28%): menus 618/618, panels 463 | Panels and dialogs partly (≈ 35% of panel strings); no help, effect names translated (306) and their parameter names not; Home screen literals unwrapped (#574) | System CJK fallback; Han follows the UI language; CJK text in comps renders wrongly (#453); IME in text layers | no | partial | 6–9 h + review |
 | Spanish | `es` | 618 (≈ 16%) | Menus only | Latin, fine | no | menus only | 7–10 h + review |
 | Hindi | `hi` | 0 | — | UI: Devanagari fallback font but no shaping; text layers shape Devanagari | no | none (After Effects: none) | 9–13 h + shaping in the UI |
 | Arabic | `ar` | 0 | — | UI: Arabic fallback font but no shaping and no RTL layout; text layers: bidi + shaping | no | none (After Effects: none) | 9–13 h + 15–25 h RTL UI |
@@ -75,7 +84,7 @@ After Effects also ships Italian and Russian, which EffectCraft does not (8–12
 German, Korean, Italian and Russian 0%). This is the localization row in
 [target-app-parity.md](target-app-parity.md#by-dimension).
 
-**Effort.** One-time work first: route effect names, parameter names and engine messages through
+**Effort.** One-time work first: route parameter names and engine messages through
 a catalog, wrap the remaining panel literals, and add a Hangul probe (10–20 h). Then each language
 needs ≈ 2,900 more strings (≈ 5–9 h per language at the pace of #398 and #401). Parity with After
 Effects' 10 non-English languages: **≈ 60–110 h**; the four extra languages of the standard list
@@ -89,3 +98,4 @@ can give; none has had it.
 |---|---|---|
 | 2026-10-10 | major | First localization parity document: catalog rows counted for all six languages, the twelve-language table, After Effects' 11 shipped languages from its bundle |
 | 2026-10-11 | minor | Ukrainian panel catalog brought level with the Chinese ones (495 of 496 rows, counted at this commit); its share rises to ≈ 29%. The other languages' panel counts are the 10 October measurement |
+| 2026-10-13 | minor | Effect names and the generated Effect menu leave English: `i18n/effects.rs` adds 306 rows keyed by effect id (Simplified Chinese, from After Effects 2026's interface and Adobe's Chinese documentation for the `CC` series) and the 21 category names. Parameter names are still English; no other language has rows |