Bugfix #895: UPPERCASE area group headers in VSCode sidebar

[amrmelsayed]

Summary

Replaces the per-word capitalization shipped in #885 with a full uppercase transform for area group headers in the VSCode sidebar's Backlog and Builders trees. The new headers match VSCode's own container-label convention (EXPLORER, SOURCE CONTROL, etc.).

Before (#885)	After
Vscode (4)	VSCODE (4)
Tower (2)	TOWER (2)
Cross Cutting (1)	CROSS-CUTTING (1)
Uncategorized (0)	UNCATEGORIZED (0)

The function is now a one-liner — area.toUpperCase() — and separators (-, _) are preserved verbatim instead of being split into spaces. cross-cutting now renders as CROSS-CUTTING, matching the issue's table exactly.

Changes

• packages/core/src/area-grouping.ts: formatAreaForDisplay renamed to uppercaseAreaName; body collapsed to area.toUpperCase(); docstring updated.
• packages/vscode/src/views/area-group-tree-item.ts: import + call site updated; docstring updated.
• packages/vscode/src/test/area-grouping.test.ts: suite renamed; assertions rewritten against the new contract.

Out of scope

• The wire-level area/* label values stay lowercase (external identifiers; Codev convention).
• Other Codev sidebar headers already follow VSCode's container-label convention.

Test plan

• pnpm --filter @cluesmith/codev-core build clean
• pnpm --filter codev-vscode check-types clean
• pnpm --filter codev-vscode lint clean
• pnpm --filter codev-vscode test:unit — 49 pass
• pnpm --filter codev-vscode compile-tests clean
• Visual verification in running VSCode (architect to confirm at review)

Fixes#895

[amrmelsayed]

Architect Review

Trivial mechanical swap, exactly as specced. 63/36 across 5 files, but only 3 production files:

• packages/core/src/area-grouping.ts (+10/-13) — capitalizeAreaName → uppercaseAreaName rename + toUpperCase() swap
• packages/vscode/src/test/area-grouping.test.ts (+18/-19) — test cases updated for the rename + new behavior
• packages/vscode/src/views/area-group-tree-item.ts (+4/-4) — caller updated for the rename

Net production change: ~25 LOC. Scope matches the issue body precisely.

Verdict

Approved. Please merge with: gh pr merge 897 --merge --admin.

Heads-up on the CHANGELOG flow

#885's CHANGELOG entry under [Unreleased] → What's new currently says "Area group headers are capitalized." Once #897 merges (which supersedes the capitalize-with-uppercase implementation), I'll rewrite the #885 entry to describe the final UPPERCASE behavior and reference both issues (#885, #895), rather than adding a confusingly-sequenced second entry. Both ship in the same release; users should see one accurate sentence about the final shipped behavior, not two contradictory ones.

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Architect review