Add project description field via Thyme BC extension and display on project details page

[EdiWeeks]

Enhancement

Add a dedicated project description field — a single short sentence describing what the project is — and display it on the project details page under the project name / customer line.

The current page shows just the project title (BC's Description field, e.g. "Cairn Homes – Support & Maintenance") and the customer name. There's no room there for a richer one-sentence summary that would help anyone landing on the page understand the project's purpose.

Why a new custom field

Investigated what BC offers natively:

• Description — already used as the project title on the card; single line, title-length only.
• Description 2 — not present on BC's Job/Project Card (it exists on Customer/Item cards but not Project).
• Comments (Comment Sheet) — multi-row list of dated notes, designed for ongoing observations / change history. Not a description; repurposing it would surface unrelated notes (e.g. "PO confirmed by phone") as the public description, which is confusing.

Conclusion: a dedicated, single-purpose field is the cleanest path.

Scope

This is a coordinated change across two repos:

knowall-ai/thyme-bc-extension

• Add a new field to the Job/Project table (suggested name: Project Description or Description 2, suggested length 250 chars — open to alternatives).
• Expose it on the extension's /projects endpoint (suggested JSON name: projectDescription).
• Add it to the Project Card page (under the existing Description field) so it can be edited in BC.

knowall-ai/thyme (this repo)

• Extend BCProject type in src/types/index.ts with the new field.
• Render it on the project details page under the customer name line in ProjectHeader.tsx.
• Hide gracefully when empty.
• Include in the PDF export so customer-facing exports show the description.

Acceptance criteria

• BC extension exposes the new field on /projects.
• BC extension Project Card page lets users enter the description.
• Thyme renders the description under the customer name on the project details page when present.
• Field is hidden (no placeholder) when empty.
• Description appears in the Export PDF output.
• Extension version bump documented; Thyme footer note / warning if older extension is in use (similar to the blocked-field warning).

Notes

• Field name and length are starting suggestions — happy to adjust based on BC naming conventions. "Description 2" matches the BC naming convention used on Customer/Item cards.
• Once the extension is published with this field, an extensionVersion bump should accompany the Thyme PR so the dependency is traceable.

[EdiWeeks]

Companion issue for the BC-side work logged in the extension repo: knowall-ai/thyme-bc-extension#37. That ships first; this issue stays blocked on it until the new extension version is released and installed.