fix(DockViewV2): TitleTemplate with ShowClose to false not work

[ArgoZhang]

Link issues

fixes #970

Summary By Copilot

Regression?

• Yes
• No

Risk

• High
• Medium
• Low

Verification

• Manual (required)
• Automated

Packaging changes reviewed?

• Yes
• No
• N/A

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• Merge the latest code from the main branch

Summary by Sourcery

Bug Fixes:

• Fix close button visibility when using a custom DockView item title template with ShowClose set to false.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Adjusts DockViewV2 tab CSS so that custom title templates using .bb-dockview-item-title correctly control the close button visibility when ShowClose is false, aligning their behavior with the default tab content styling.

Flow diagram for DockViewV2 CSS selector logic for close button visibility

flowchart TD
    A[Start: Render DockViewV2 tab] --> B{Tab_has_ShowClose_false?}
    B -->|No| C[Show close button using default styling]
    B -->|Yes| D{Title_element_type}
    D -->|dv_default_tab_content| E[Match selector bb_dockview dv_tab_on > dv_default_tab_content + dv_default_tab_action]
    D -->|bb_dockview_item_title| F[Match selector bb_dockview dv_tab_on > bb_dockview_item_title + dv_default_tab_action]
    E --> G[Hide or adjust dv_default_tab_action close button]
    F --> G
    G --> H[Tabs and actions container with dv_tab_on matches selectors for bb_dockview_control_icon_close]
    H --> I[Close button visibility now consistent for default and custom title templates]
    C --> I

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File-Level Changes

Change	Details	Files
Align close-button visibility logic for custom title templates with default tab title behavior in DockViewV2 CSS.	Extend the CSS selector that toggles .dv-default-tab-action based on the active tab so it also matches tabs using .bb-dockview-item-title before the action container Normalize the CSS file header by removing a stray BOM-related character before the @import statement	src/components/BootstrapBlazor.DockView/wwwroot/css/dockview-bb.css

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#970	Fix DockViewV2 so that when a TitleTemplate is used with ShowClose set to false, the close action/icon is correctly hidden and behaves as expected.	✅

Possibly linked issues

• bug(DockViewV2): TitleTemplate with ShowClose to false not work #970: PR updates DockViewV2 CSS selectors so TitleTemplate tabs respect ShowClose=false, fixing the reported bug.

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[sourcery-ai]

Hey - I've left some high level feedback:

• The new .bb-dockview .dv-tab-on > .bb-dockview-item-title + .dv-default-tab-action rule duplicates the previous pattern; consider extracting a shared class or more generic selector so future changes to tab-on behavior don't require updating multiple selectors.
• Since this logic relies on :has(.dv-tab-on) for close button behavior, confirm that all supported target browsers for DockViewV2 reliably support :has, or provide a graceful fallback to avoid regressions in older environments.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- The new `.bb-dockview .dv-tab-on > .bb-dockview-item-title + .dv-default-tab-action` rule duplicates the previous pattern; consider extracting a shared class or more generic selector so future changes to tab-on behavior don't require updating multiple selectors.
- Since this logic relies on `:has(.dv-tab-on)` for close button behavior, confirm that all supported target browsers for DockViewV2 reliably support `:has`, or provide a graceful fallback to avoid regressions in older environments.

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[Copilot]

Pull request overview

Fixes DockViewV2 behavior where providing a TitleTemplate prevented ShowClose="false" from hiding the tab close action, by extending the CSS rule to cover the template-based title element.

Changes:

• Update DockView CSS to hide .dv-default-tab-action when the active tab title is rendered via .bb-dockview-item-title (TitleTemplate path).
• Bump BootstrapBlazor.DockView package version from 10.0.6 to 10.0.7.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/components/BootstrapBlazor.DockView/wwwroot/css/dockview-bb.css	Adds a sibling selector to ensure the close action is hidden when the tab title is replaced by the TitleTemplate wrapper element.
src/components/BootstrapBlazor.DockView/BootstrapBlazor.DockView.csproj	Patch version bump for the DockView package to ship the fix.

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