Move dedupe cases fixture into web so docker build can see it

The PWA's names.test.ts imported internal/ai/harness/testdata/dedupe_cases.json,
which is outside the web build context the Dockerfile's web stage copies, so
tsc failed and docker build . failed. The single case file now lives at
web/src/dinners/testdata/dedupe_cases.json; the harness Go test reads it from
there, as TestLetterFoldsMatchPWA already reads letterFolds.json.

Maestro task: 3eee9f68-2d34-4e49-8ca5-43bacfb642f0

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/ARCHITECTURE.md

@@ -517,7 +517,7 @@ Regular has a name `harness.Similar` to it — the PWA's copy of the name
 rules in `web/src/dinners/names.ts` folds letters with
 `web/src/dinners/letterFolds.json`, which `gen_folds.py` writes from the
 same table as the server's, and runs the same cases,
-`internal/ai/harness/testdata/dedupe_cases.json`, as the server's) and
+`web/src/dinners/testdata/dedupe_cases.json`, as the server's) and
 notifications (`/onboarding/notifications`: what MealQuest notifies about,
 the iOS install hint, "Turn on notifications" and "Maybe later"). Either
 button sends `PATCH /api/v1/settings/household` with

internal/ai/harness/dedupe_test.go

@@ -8,11 +8,11 @@ import (
 	"unicode/utf8"
 )
 
-// TestSharedDedupeCases runs testdata/dedupe_cases.json, which the PWA's
-// copy of Normalize and Similar (web/src/dinners/names.ts) runs too, so the
-// two cannot drift apart on these names.
+// TestSharedDedupeCases runs web/src/dinners/testdata/dedupe_cases.json,
+// which the PWA's copy of Normalize and Similar (web/src/dinners/names.ts)
+// runs too, so the two cannot drift apart on these names.
 func TestSharedDedupeCases(t *testing.T) {
-	raw, err := os.ReadFile("testdata/dedupe_cases.json")
+	raw, err := os.ReadFile("../../../web/src/dinners/testdata/dedupe_cases.json")
 	if err != nil {
 		t.Fatal(err)
 	}

web/src/dinners/names.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest'
-import cases from '../../../internal/ai/harness/testdata/dedupe_cases.json'
+import cases from './testdata/dedupe_cases.json'
 import { normalizeName, similarNames } from './names.ts'
 
 // The cases internal/ai/harness's tests run against Normalize and Similar.

web/src/dinners/names.ts

@@ -1,7 +1,7 @@
 // The PWA's copy of the server's dinner-name rules (internal/ai/harness
 // Normalize and Similar), so a screen can tell beforehand that the dinners
 // API would refuse a name as a duplicate. The server still decides.
-// internal/ai/harness/testdata/dedupe_cases.json is run against both.
+// web/src/dinners/testdata/dedupe_cases.json is run against both.
 
 import folds from './letterFolds.json'