fix(logging-view): resolve four logging view issues (#601, #602, #603, #604)

[JavierRibaldelRio]

Summary

Fixes the four open <Logging-View> issues filed by @davidpascual05:

• <Logging-View> Logo does not appear in PNG image when autoscale is applied #601 — Logo missing from PNG export when autoscale is applied. Root cause: the plot's Plotly modebar had two "download as PNG" affordances — the app's own header Export PNG button (always renders in the light/print theme with the Hyperloop logo watermark) and Plotly's own built-in "Download plot as a PNG" camera-icon button (snapshots the raw on-screen dark canvas, no branding, ever). The built-in button sits right next to Autoscale/Reset axes in the modebar, so a user who'd just clicked Autoscale would often reach for it instead of the dedicated header button — producing an unbranded export that had nothing to do with autoscale itself. Fix: removed the built-in button (modeBarButtonsToRemove: [..., "toImage"]) so there's a single, always-branded PNG export path. Verified with a real headless-browser repro before and after the fix.
• <Logging-View> On-screen message when adding a new plot #602 — No on-screen indication when a new plot is added. Added a transient "Plot N added" toast (mirrors the existing SessionStatusToast styling/auto-dismiss pattern), triggered centrally from addStudioPlot so every entry point (toolbar, sidebar, per-series "New Plot") is covered.
• <Logging-View> The table of contents does not contain links #603 — Table of contents doesn't link to plots. This turned out to be about the exported PDF report's Table of Contents page, not the in-app sidebar (which I also made clickable as a small bonus, see below) — its entries were plain text with no way to jump to the corresponding chart page. Each entry (and its page number) is now a real internal jsPDF link to that chart's page; verified against an actual export (link annotations with distinct /Dest page targets, one per plot).
• <Logging-View> Button to lock a plot #604 — Button to lock a plot. Added a per-plot lock toggle (header button + context-menu item). Locking a plot sets fixedrange on all its axes (Plotly's native mechanism — this also makes Plotly hide the now-useless zoom/pan modebar entirely) and disables drag-to-resize, inline rename, and signal drag-and-drop onto that plot, so its view can't be changed by accident. Hover/tooltips keep working.

Bonus (not a reported issue, but a natural companion to #603): each plot's name in the in-app right-panel "Plots" list is now also a link that scrolls the corresponding plot into view in the main area.

Test plan

All fixes were manually verified end-to-end against the real app (synthetic CSV session, headless Chromium via Playwright), not just type-checked:

• tsc -b --noEmit passes clean
• eslint . — no new warnings/errors introduced
• vite build succeeds
• <Logging-View> Logo does not appear in PNG image when autoscale is applied #601: confirmed the built-in PNG button is gone from the modebar; confirmed the header "Export PNG" button still exports with the logo in the bottom-right corner, with and without a prior Autoscale click, on single- and dual-axis plots
• <Logging-View> On-screen message when adding a new plot #602: confirmed the toast appears with the correct plot name and auto-dismisses after 3s
• <Logging-View> The table of contents does not contain links #603: exported a real multi-plot PDF and confirmed the ToC's link annotations point to distinct, correct chart pages (/Dest [7/9/11 0 R ...] for 3 plots), and that the entries render in link-blue
• <Logging-View> Button to lock a plot #604: confirmed locking hides the zoom cluster/modebar/resize handle, blocks scroll-zoom (axis range unchanged), blocks rename, and that unlocking fully restores all of the above