feat(search): complete PR #33850 with Zoekt UI translations and search mode coverage

[Copilot]

This updates the branch to fully reflect the Zoekt code-search work from go-gitea#33850 and closes the remaining review gap where Zoekt search labels rendered as missing translation keys.
The change set is intentionally minimal: bring in the upstream Zoekt implementation, then add the missing English locale entries and a focused unit test.

Description

• Zoekt code-search support

  • Cherry-picked upstream feat(search): support code search by zoekt changeset.
  • Includes Zoekt-backed code indexer/search wiring, settings, and dependency integration.

• Missing UI translation keys

  • Added missing English locale keys used by SearchModeZoekt:
    • search.zoekt
    • search.zoekt_tooltip
  • Prevents untranslated key names from appearing in search mode UI.

• Focused regression coverage

  • Added modules/indexer/indexer_test.go to assert ZoektSearchModes() exposes the Zoekt mode with the expected title/tooltip translation keys.

assert.Contains(t, ZoektSearchModes(), SearchMode{
    ModeValue:    SearchModeZoekt,
    TooltipTrKey: "search.zoekt_tooltip",
    TitleTrKey:   "search.zoekt",
})

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• code.onedev.io
  • Triggering command: /tmp/go-build629789337/b2249/migrations.test /tmp/go-build629789337/b2249/migrations.test -test.testlogfile=/tmp/go-build629789337/b2249/testlog.txt -test.paniconexit0 -test.timeout=10m0s --64�� u/13/liblto_plugin.so _64-linux-gnu/13/lto-wrapper Ac2yGL.res -o s l/linux_amd64/ve/usr/libexec/gcc/x86_64-linux-gnu/13/liblto_plugin.so /x86_64-linux-gn-plugin-opt=/usr/libexec/gcc/x86_64-linux-gnu/13/lto-wrapper s -o (dns block)
• devstoreaccount1.azurite.local
  • Triggering command: /tmp/go-build629789337/b2043/storage.test /tmp/go-build629789337/b2043/storage.test -test.testlogfile=/tmp/go-build629789337/b2043/testlog.txt -test.paniconexit0 -test.timeout=10m0s ortc�� /usr/libexec/gcc/x86_64-linux-gnu/13/liblto_plugin.so stmain.go ux-amd64/pkg/tool/linux_amd64/compile -plugin-opt=-pasas -plugin-opt=-pas--64 -plugin-opt=-pas-o ux-amd64/pkg/too/tmp/ccuH1LoB.o --64�� 789337/b1983/conda.test /tmp/ccywsA6Z.o (dns block)
• elasticsearch
  • Triggering command: /tmp/go-build629789337/b1917/elasticsearch.test /tmp/go-build629789337/b1917/elasticsearch.test -test.testlogfile=/tmp/go-build629789337/b1917/testlog.txt -test.paniconexit0 -test.timeout=10m0s x86-�� -o /tmp/go-link-125--hash-style=gnu /usr/bin/ld /tmp/go-link-125as dels/user/badge.--64 ux-amd64/pkg/too-o /usr/bin/ld -plu�� u/13/liblto_plugin.so _64-linux-gnu/13/lto-wrapper rg/toolchain@v0.0.1-go1.26.0.linux-amd64/pkg/tool/linux_amd64/vet d s tation rg/toolchain@v0./tmp/ccvmP9ro.o (dns block)
  • Triggering command: /tmp/go-build878430625/b1052/elasticsearch.test /tmp/go-build878430625/b1052/elasticsearch.test -test.testlogfile=/tmp/go-build878430625/b1052/testlog.txt -test.paniconexit0 -test.timeout=10m0s /tmp/go-build878430625/b960/vet.cfg /internal/timese-errorsas rg/toolchain@v0.-ifaceassert ux-amd64/pkg/tool/linux_amd64/vet --gdwarf-5 tea/modules/auth-atomic mpile ux-amd64/pkg/too-buildtags 4306�� _.a om/!proton!mail/-ifaceassert ux-amd64/pkg/tool/linux_amd64/vet . /minio-go/v7/pkg-atomic mpile ux-amd64/pkg/too-buildtags (dns block)
• gitlab.com
  • Triggering command: /tmp/go-build629789337/b2249/migrations.test /tmp/go-build629789337/b2249/migrations.test -test.testlogfile=/tmp/go-build629789337/b2249/testlog.txt -test.paniconexit0 -test.timeout=10m0s --64�� u/13/liblto_plugin.so _64-linux-gnu/13/lto-wrapper Ac2yGL.res -o s l/linux_amd64/ve/usr/libexec/gcc/x86_64-linux-gnu/13/liblto_plugin.so /x86_64-linux-gn-plugin-opt=/usr/libexec/gcc/x86_64-linux-gnu/13/lto-wrapper s -o (dns block)
• meilisearch
  • Triggering command: /tmp/go-build629789337/b1921/meilisearch.test /tmp/go-build629789337/b1921/meilisearch.test -test.testlogfile=/tmp/go-build629789337/b1921/testlog.txt -test.paniconexit0 -test.timeout=10m0s x86-�� -o /tmp/ccjIDCBD.o /usr/bin/gcc g_.a /tmp/cc7Vxmjc.o nwind-tables r-strong -m64�� y otection rg/toolchain@v0.0.1-go1.26.0.linux-amd64/pkg/tool/linux_amd64/compile c t l/linux_amd64/li/tmp/go-build629789337/b1920/_pkg_.a rg/toolchain@v0.-trimpath (dns block)
  • Triggering command: /tmp/go-build878430625/b1056/meilisearch.test /tmp/go-build878430625/b1056/meilisearch.test -test.testlogfile=/tmp/go-build878430625/b1056/testlog.txt -test.paniconexit0 -test.timeout=10m0s /tmp/go-build878430625/b962/vet.cfg 1.78.0/grpclog/i-errorsas 1.78.0/grpclog/i-ifaceassert ux-amd64/pkg/tool/linux_amd64/vet -p ons/jobparser mpile ux-amd64/pkg/too-buildtags pkg/�� _.a mpile ux-amd64/pkg/tool/linux_amd64/vet . tea/modules/auth-atomic mpile ux-amd64/pkg/too-buildtags (dns block)
• smtp.mydomain.test
  • Triggering command: /tmp/go-build629789337/b2037/setting.test /tmp/go-build629789337/b2037/setting.test -test.testlogfile=/tmp/go-build629789337/b2037/testlog.txt -test.paniconexit0 -test.timeout=10m0s s -o stmain.go de/node/bin/as -o (dns block)
  • Triggering command: /tmp/go-build351283730/b001/setting.test /tmp/go-build351283730/b001/setting.test -test.testlogfile=/tmp/go-build351283730/b001/testlog.txt -test.paniconexit0 -test.timeout=10m0s estl�� pkg/mod/github.c-pthread t rg/toolchain@v0.-fmessage-length=0 -p github.com/bleve-o t rg/toolchain@v0.-trimpath (dns block)

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