feat: add eye icon tip to empty result messages

[xuang7]

What changes were proposed in this PR?

This PR adds a tip about the eye icon when an operator shows no results, guiding users to enable materialization and execute the workflow to view results.

Any related issues, documentation, discussions?

Closes #4500

How was this PR tested?

Manually tested.

Was this PR authored or co-authored using generative AI tooling?

No

[codecov-commenter]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 42.84%. Comparing base (09828ea) to head (ca79422).

Files with missing lines	Patch %	Lines
...component/result-panel/result-panel.component.html	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #5061   +/-   ##
=========================================
  Coverage     42.84%   42.84%           
  Complexity     2204     2204           
=========================================
  Files          1045     1045           
  Lines         40144    40146    +2     
  Branches       4240     4240           
=========================================
+ Hits          17198    17199    +1     
- Misses        21879    21880    +1     
  Partials       1067     1067           

Flag	Coverage Δ		*Carryforward flag
access-control-service	39.53% <ø> (ø)		Carriedforward from 09828ea
agent-service	33.72% <ø> (ø)		Carriedforward from 09828ea
amber	43.71% <ø> (ø)		Carriedforward from 09828ea
computing-unit-managing-service	0.00% <ø> (ø)		Carriedforward from 09828ea
config-service	0.00% <ø> (ø)		Carriedforward from 09828ea
file-service	32.18% <ø> (ø)		Carriedforward from 09828ea
frontend	33.93% <50.00%> (+<0.01%)	⬆️
python	88.99% <ø> (ø)		Carriedforward from 09828ea
workflow-compiling-service	47.72% <ø> (ø)		Carriedforward from 09828ea

*This pull request uses carry forward flags. Click here to find out more.

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