feat(deps-viewer): mark alloc tasks as fire sources

[Little-oil]

Summary

• extend the early-dispatch badges introduced in feat(dfx): capture early-dispatch flag in dep_gen, badge it in deps_viewer #1340 so alloc nodes render with 🔥 by default
• treat alloc nodes as fire-marked sources for ⭐ computation, so consumers fully fed by alloc and/or flagged producers are shown consistently
• add viewer coverage for standalone alloc nodes and an alloc-to-submit edge

Validation

• direct deps_viewer marker assertions against Qwen3 decode deps.json
• ruff check simpler_setup/tools/deps_viewer.py tests/ut/py/test_deps_viewer.py

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: ed816e7b-7336-43bb-b0b8-463eac9c8441

📥 Commits

Reviewing files that changed from the base of the PR and between 438d5cb and 431768f.

📒 Files selected for processing (2)

• simpler_setup/tools/deps_viewer.py
• tests/ut/py/test_deps_viewer.py

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📝 Walkthrough

Walkthrough

Updated dependency graph marker computation so alloc tasks receive the fire marker, with metadata passed through emit_dot. Tests now verify fire-marked alloc sources and star-marked successor nodes.

Changes

Alloc Fire Marker Rendering

Layer / File(s)	Summary
Marker logic and rendering validation simpler_setup/tools/deps_viewer.py, tests/ut/py/test_deps_viewer.py	_task_markers recognizes alloc tasks as fire-marked, emit_dot passes metadata, and tests verify the resulting fire and star labels.

Estimated code review effort: 2 (Simple) | ~10 minutes

Poem

I’m a bunny with sparks in my nest,
Alloc tasks now glow with the best.
Fire leads the way,
Stars follow the array—
DOT graphs look bright and refreshed!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: treating alloc tasks as fire sources in deps-viewer.
Description check	✅ Passed	The description accurately matches the implemented deps-viewer badge and test updates.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[gemini-code-assist]

Code Review

This pull request updates the dependency viewer to treat 'alloc' tasks as fire-marked ('🔥') producers by default, which also propagates star-markers ('⭐') to their successors. The reviewer identified an issue where, in plain mode (when task_table is empty or None), all nodes default to being classified as 'alloc' tasks. This leads to excessive visual noise as every node becomes fire-marked. The reviewer suggested guarding _fire_marked to return False when task_table is empty and updating the unit tests accordingly.

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