feat(workspace): open tonight's first part from the range card

[seonghobae]

Product outcome

The ready map already names tonight's first playable range. Players still had to hunt RoleSwitcher to hear that part. From the full-band view, the range card now offers Open {role} on the map. That control selects the named part so the player can hear it, then the existing instrument-check copy remains the next action.

Exact head: aa604734baebec68b25134397fd215b7a0b64e4d on feat/workspace-open-first-range-part, based on develop@749511c3ad4000090048718f685c6bee6b3d2c25.

This slice is UI-only. It does not mix:

• 🔒 [보안] CLI 무제한 파일 읽기 취약점 수정 #811 CLI Win32 path authority
• test(analysis): govern real YouTube known-stem benchmark #828 / [Product Gap] Add real-audio MIR accuracy acceptance benchmarks #770 MIR / YouTube known-stem e2e (test(analysis): govern real YouTube known-stem benchmark #828 owns MIR)
• feat(workspace): Storybook tokens for rehearsal components #897 Storybook + design tokens
• feat: import rehearsal handoffs for focused reanalysis #740 / [Product Gap] Complete the rehearsal handoff round trip #739 handoff import
• feat(workspace): lead the handoff with tonight's first range #1118 export first-range handoff
• feat(workspace): copy tonight's first check for the band chat #1120 copy first check
• feat(workspace): name tonight's first groove change on the map #1122 first groove change

Behavior

• firstRangeOpenPart returns the squeeze only when the named role exists in the switcher and is not already selected.
• Missing span, missing role, or already-selected role: fail closed (no button).
• English: Open {roleName} on the map
• Korean: 지도에서 {roleName} 열기

Tests

npm --workspace @bandscope/desktop exec --force -- vitest run firstRangeSqueeze.test.ts Workspace.test.tsx — 2 files, 34 tests passed.

Security Notes

UI-only. No file paths, URLs, subprocesses, or new network. Does not change the #783 npm HIGH baseline. Does not suppress Dependabot.

i18n

EN + KO keys for the open-part control. Customer-facing copy names the part and enables the next action.

Do not self-approve. Merge only with an independent non-author APPROVE on this exact head plus required-gate success. Queue/pending/skipped/cancelled is non-passing.

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📥 Commits

Reviewing files that changed from the base of the PR and between 749511c and aa60473.

📒 Files selected for processing (10)

• AGENTS.md
• ARCHITECTURE.md
• CHANGELOG.md
• CLAUDE.md
• apps/desktop/src/features/workspace/Workspace.test.tsx
• apps/desktop/src/features/workspace/Workspace.tsx
• apps/desktop/src/features/workspace/firstRangeSqueeze.test.ts
• apps/desktop/src/features/workspace/firstRangeSqueeze.ts
• apps/desktop/src/locales/en/common.json
• apps/desktop/src/locales/ko/common.json

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.

[seonghobae]

Preservation child of canonical first-range navigation owner #1143. The base is intentionally retargeted to feat/workspace-find-first-range-section@ce6c8fcf11b4191c2925324f7b8ac2a1b086484f so this sibling cannot be integrated independently as another same-boundary writer.

Keep the unique firstRangeOpenPart / RoleSwitcher behavior, its fail-closed admission cases, EN/KO copy, and focused tests until #1143 (or its verified successor) actually contains equivalent production behavior and regression evidence. Current overlapping-file conflicts are repair findings, not grounds to drop this delta or close the PR. Predecessor checks/reviews do not transfer.