BaseUI: Favorite Screen Signal Quality improvement

[HarukiToreda]

This PR fixes the value shown on the Favorite Node Screens. Before the calculation did not take into account of the radio preset, so the max value considered good was 82%. This PR replaces it with a Bad, fair or Good along with a graphical signal bar to make it more intuitive. Since it took more space, i had to change [Hops] with a graphic as well.

Lastly I removed the constrains that made the Distance line when we had Uptime values from the node. Now all are visible.

Before

After

[Copilot]

Pull request overview

Updates the Favorite Node Info screen UI to present signal quality as a qualitative grade with bar graphics (instead of a percent), replaces the hops label with an icon, and adjusts row layout/formatting to fit more node details.

Changes:

• Add a new hop icon bitmap for use in UI rendering.
• Revise Favorite Node Info rendering to show signal grade + bars and render hops as [count + hop icon].
• Change uptime formatting behavior (prefix now controls punctuation/spacing) and tighten several on-screen strings to save space.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
src/graphics/images.h	Adds a hop icon bitmap and dimensions for UI use.
src/graphics/draw/UIRenderer.cpp	Implements new signal-quality grading + bar rendering and hops icon drawing on Favorite Node screens; adjusts several compact UI strings and adds a battery line.
src/graphics/draw/DebugRenderer.cpp	Updates uptime prefix passed to getUptimeStr() to match new formatting expectations.
src/graphics/TimeFormatters.cpp	Changes getUptimeStr() to no longer auto-insert ": " after the prefix.

Comments suppressed due to low confidence (1)

src/graphics/draw/UIRenderer.cpp:1197

• After changing getUptimeStr() to no longer auto-insert ": ", this call passes the prefix as "Last" (no colon/space). That will render as Last5m 10s etc. Update the prefix to include the desired punctuation/spacing (e.g. "Last:" or "Last: ") for consistency with the other branch and the fallback string "Last: ?".

#else
            // Non E-Ink: include seconds where useful
            getUptimeStr(delta, "Last", uptimeStr, sizeof(uptimeStr), true);
#endif

[Copilot]

getSnrLimit() logic is duplicated here but already exists elsewhere in the codebase (e.g. src/modules/CannedMessageModule.cpp). Consider moving this preset→SNR-limit mapping (and possibly signal grading) into a shared helper so UI and other features stay consistent when presets/thresholds change.