fix: enrichment host field, dashboard overlap, and settings polish

[TerrifiedBug]

Summary

• Add .vectorflow.host = get_hostname!() to enrichment metadata VRL
• Fix dashboard stat cards overlapping the view tab bar (remove -mb-4)
• Remove blue dot indicator from pipeline settings gear icon
• Clean up pipeline settings popover layout (inline toggle, aligned collapsibles)

Test plan

• Deploy pipeline with enrichment enabled → verify YAML includes .vectorflow.host = get_hostname!()
• Dashboard page → stat cards no longer overlap the view tabs
• Pipeline editor → settings gear has no blue dot
• Pipeline editor → open settings popover → toggle and description are aligned, collapsibles have consistent styling

[greptile-apps]

Greptile Summary

This PR delivers four targeted fixes across the pipeline editor and dashboard: injecting .vectorflow.host = get_hostname!() into the enrichment VRL, removing a negative margin that caused stat cards to visually overlap the dashboard tab bar, removing the blue dot indicator from the settings gear icon, and cleaning up the pipeline settings popover layout for better alignment. The changes are small, self-consistent, and low-risk.

Key changes:

• yaml-generator.ts: Adds .vectorflow.host = get_hostname!() as the third enrichment field in the per-sink VRL remap transform. get_hostname!() is correct infallible VRL syntax.
• page.tsx: Removes -mb-4 from the dashboard tab bar div, fixing stat card overlap.
• flow-toolbar.tsx: Fully removes useHasGlobalConfigContent import, the derived state variable, and the absolute-positioned blue dot <span> (also removes the now-unnecessary relative class from the button).
• pipeline-settings.tsx: Restructures the enrichment toggle to place the label/switch inline and description below; updates description copy to mention .vectorflow.host; adds shrink-0 to chevron and badge in both collapsibles; switches collapsible trigger text from font-semibold to font-medium; removes the exported useHasGlobalConfigContent hook.

Confidence Score: 5/5

• This PR is safe to merge — all changes are small, targeted UI and YAML generation fixes with no logic regressions or security concerns.
• All four changes are straightforward: one VRL string append with correct syntax (get_hostname!() is valid infallible VRL), one CSS class removal, and two consistent UI cleanup removals across toolbar and settings. No new logic paths, no auth/data flow changes, no risk of breaking existing behavior.
• No files require special attention.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Pipeline Graph Nodes and Edges] --> B[generateVectorYaml]
    B --> C{enrichment enabled?}
    C -- No --> D[Raw YAML output]
    C -- Yes --> E[For each sink key]
    E --> F["VRL remap transform source:\n.vectorflow.environment = env\n.vectorflow.pipeline_version = version\n.vectorflow.host = get_hostname!()"]
    F --> G[Inject vectorflow_enrich_SINK transform\nbetween upstream sources and sink]
    G --> H[Enriched YAML output]
    H --> I[Vector Agent receives config]

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_{Last reviewed commit: 475b4d8}