feat(home): convert dashboard view (closes #15)

[Terracosmos]

Closes

closes #15

Depends on

This PR depends visually on #26 (CSS cache desync fix). Without that fix, the new scoped styles introduced here would silently mismatch their JS scope after upgrade — please review/merge #26 first.

Changes per request

Matches the 6 elements of the issue description :

• A. Progressbar in card title : tool-level health bar relocated from .card-foot to .card-head, computed from a single batched rest/subscription/status/refresh?id=… (chunks of 50) that fans out across all listed subscription ids, then merged best-effort. When no statuses are available, the bar is hidden.
• B. Content = mini-table (without node type/name) : <div class="row"> listing replaced by a lightweight scoped mini-table (.mini / .mrow). Headers: project name + LjStatus dot (imported from @ligoj/host since #115). Capped at 50 rows with a +N more marker.
• C. Click row → related project : each row routes to /project/${row.projectId}, mirroring ProjectListView.openProject. realTools now preserves projectId per row.
• D. Collapsible cards : chevron in .card-head, local reactive Set of collapsed tool keys, smooth v-expand-transition. Default state : all expanded.
• E. Global collapse / expand all button : added in .toolbar next to the existing LjSegmented Cartes/Liste toggle, visible only in cards mode. Dynamic label (common.collapseAll / common.expandAll, new i18n keys).
• F. Preferred color per card : layered cascade — best-effort same-origin PNG canvas extraction (dominant non-white / non-black pixels, weighted by saturation) → existing COLORS named map → deterministic PALETTE fallback. Applied as a 4px border-top on .card-head in addition to the existing gradient.

Note on the SVG-derived option

The issue text says the color can also be "provided by the plugin (need data model evolution)". This PR stays strictly frontend (no plugin-api / data model changes). A follow-up PR is planned to migrate NodeIcon from <img> PNG to inline <svg> in the host, which would enable a stricter SVG-derived color path. Tracked separately.

Verified runtime

All six criteria validated on localhost:

• title progressbars visible (Jira 82%, Confluence 88%, Squash TM 80%)
• mini-table renders with LjStatus dots per row
• chevron collapses individual cards; "Tout réduire" / "Tout déplier" toggles all
• border-top colors distinct per tool (blue / orange / red)
• list mode left intact (still routes to /project since rows are tools, not single projects)

No behavioural regression introduced. Stat-bar and admin layout bugs surfaced during this work are fixed in the companion PR #26.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud