Closes #10334.

In the "Plugins -> Skills" list, standalone skills (data/skills/...) and plugin-provided skills (data/plugins/<plugin>/skills/...) look identical: only the name, description, and file path are shown, so users have to read the path to tell where a skill comes from. This is confusing when a plugin is disabled or misbehaving, because its skills become unavailable and can easily be mistaken for standalone skills. The backend already returns the origin fields (source_type, source_label, plugin_name, plugin_display_name, plugin_active) and PersonaCapabilitiesEditor.vue already uses them, but SkillsSection.vue only used source_type for behavior control and never displayed the origin.

Modifications / 改动点

Only dashboard/src/components/extension/SkillsSection.vue is modified.

• Add a source chip to every skill card in the Local Skills list: plugin skills show Plugin: {name} (preferring plugin_display_name, then source_label, then plugin_name), both shows Local + Sandbox, sandbox_only shows Sandbox Preset Skill, and everything else shows Local Skill.

• Reuse the existing skills.sourcePlugin / skills.sourceBoth / skills.sourceSandboxOnly / skills.sourceLocalOnly i18n keys, which already exist in all four locales (en-US, ja-JP, ru-RU, zh-CN). No new translation keys are added.

• Narrow the existing "Preset" chip condition to skill.preset, so it no longer duplicates the new sandbox-preset source label.

• The disabled / read-only behavior and the existing "Plugin disabled" chip are intentionally unchanged.

• This is NOT a breaking change. / 这不是一个破坏性变更。

Screenshots or Test Results / 运行截图或测试结果

Verification steps: open the Dashboard, go to Plugins -> Skills (Local mode); confirm a source chip is shown on every card (plugin skills show Plugin: <display name> and additionally Preset for built-in plugins, standalone skills show Local Skill, sandbox-preset skills show Sandbox Preset Skill); disable a plugin and confirm Plugin: <name> still shows next to Plugin disabled; switch the Dashboard language and confirm the chip text is localized.

Screenshots:

Checklist / 检查清单

• 😊 If there are new features added in the PR, I have discussed it with the authors through issues/emails, etc. / 如果 PR 中有新加入的功能，已经通过 Issue / 邮件等方式和作者讨论过。

• 👀 My changes have been well-tested, and "Verification Steps" and "Screenshots" have been provided above. / 我的更改经过了良好的测试，并已在上方提供了“验证步骤”和“运行截图”。

• 📚 I checked the affected WebUI instructions and screenshots in docs/zh and docs/en against the changed navigation, page structure, and labels, and updated them in this PR (or explained why no documentation update is needed). For renamed, moved, or merged entry points, I included an old entry → new entry mapping in the documentation and changelog. / 我已对照变化后的 WebUI 入口、页面结构和术语，核对并在本 PR 中更新 docs/zh 和 docs/en 的相关操作说明与截图（或说明无需更新文档的原因）。入口改名、移动或合并时，已在文档和 changelog 中补充 旧入口 → 新入口 对照。

  • No docs update needed: this change only adds a source label to the existing skill cards, and does not change navigation, page structure, terminology, or entry points.

• 🤓 I have ensured that no new dependencies are introduced, OR if new dependencies are introduced, they have been added to the appropriate locations in requirements.txt and pyproject.toml. / 我确保没有引入新依赖库，或者引入了新依赖库的同时将其添加到 requirements.txt 和 pyproject.toml 文件相应位置。

• 😮 My changes do not introduce malicious code. / 我的更改没有引入恶意代码。

Summary by Sourcery

Display each skill’s origin directly in the Dashboard skills list.

New Features:

• Add localized source badges to skill cards so users can distinguish plugin-provided, local, combined, and sandbox preset skills.

Enhancements:

• Preserve existing preset and plugin-disabled indicators while avoiding duplicate preset labeling.