desktop: equalize dashboard card heights

[kodjima33]

Summary

Follow-up to #6902. The shrink-to-fit fix landed but the two cards no longer matched heights — the shorter card's panel left a visible gap because Grid cells don't auto-stretch to row height when the cell views are intrinsic-sized.

This PR:

• Restores .frame(maxHeight: .infinity, alignment: .topLeading) on each widget root so each card fills its grid cell.
• Adds .fixedSize(horizontal: false, vertical: true) on the Grid in DashboardPage.expandedWidgets so the Grid itself reports only the row's intrinsic height instead of competing with ChatMessagesView for vertical space.

Net effect: cards size to the taller of the two intrinsic heights (matching), and the rest of the dashboard goes to the chat view as before.

Test plan

• Dashboard with mismatched content (e.g. 3 tasks, 1 goal) — both cards' panels are the same height (taller intrinsic wins).
• Dashboard with similar content (3 tasks, 3 goals) — same height, both compact.
• Empty state on either card — both still equal-height with reasonable padding.

🤖 Generated with Claude Code

[greptile-apps]

Greptile Summary

This PR is a follow-up to #6902 that restores equal-height dashboard cards after the shrink-to-fit fix caused a visible gap when one card was shorter than the other. It adds .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading) back to both widget roots so each card fills its Grid cell, and applies .fixedSize(horizontal: false, vertical: true) to the Grid so it reports only the row's intrinsic height instead of competing with ChatMessagesView for vertical space.

Confidence Score: 5/5

Safe to merge — minimal, targeted SwiftUI layout fix with no logic or data-handling changes.

All changes are confined to SwiftUI view modifiers. The combination of fixedSize(horizontal: false, vertical: true) on the Grid and maxHeight: .infinity on each widget is the correct pattern for equal-height grid cells with intrinsic content. No P0 or P1 findings.

No files require special attention.

Important Files Changed

Filename	Overview
desktop/Desktop/Sources/MainWindow/Pages/DashboardPage.swift	Added .fixedSize(horizontal: false, vertical: true) to the Grid in expandedWidgets to constrain the grid to its row's intrinsic height and prevent it from competing with ChatMessagesView for vertical space.
desktop/Desktop/Sources/MainWindow/Components/GoalsWidget.swift	Restored .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading) on the root VStack so the Goals card fills its grid cell, enabling equal-height equalisation with the Tasks card.
desktop/Desktop/Sources/MainWindow/Components/TodaysTasksWidget.swift	Restored .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading) on the root VStack so the Tasks card fills its grid cell, mirroring the same fix in GoalsWidget.
desktop/CHANGELOG.json	Added two unreleased entries describing the shrink-to-fit fix (#6902) and this equal-height follow-up; no structural issues.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[DashboardPage VStack] --> B[dashboardWidgets]
    A --> C[ChatMessagesView\n.frame maxHeight .infinity]
    A --> D[ChatInputView]

    B --> E{widgetsCollapsed?}
    E -- yes --> F[collapsedWidgetBar]
    E -- no --> G[expandedWidgets\n.fixedSize horizontal:false vertical:true]
    E -- no --> H[collapseButton]

    G --> I[Grid]
    I --> J[GridRow]
    J --> K[TasksWidget\n.frame minWidth:0 maxWidth:.infinity\nroot: maxHeight:.infinity topLeading]
    J --> L[GoalsWidget\n.frame minWidth:0 maxWidth:.infinity\nroot: maxHeight:.infinity topLeading]

    style G fill:#6c63ff,color:#fff
    style K fill:#444,color:#fff
    style L fill:#444,color:#fff

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