fix(aqua): resolve bin paths for prefixed v tags

[risu729]

Summary

• Keep Aqua list_bin_paths() local-only while allowing file path templates to try both canonical and prefixed-v tag-shaped versions.
• Use the already-resolved install version when creating Aqua file links during install.
• Add unit coverage for version-prefix packages whose actual tags include an extra v after the prefix, such as tool-v1.2.3 for canonical 1.2.3.

Why

PR #5562 aligned list_bin_paths() with install-time version resolution by sharing the full resolver, but it was reverted in #5574 after the hyperfine check showed a serious slowdown.

The slowdown came from putting remote resolution on the PATH/bin-path path: the shared resolver could fetch GitHub tags/releases, probe URLs/HEADs, and build fallback errors even when list_bin_paths() only needed local installed file paths.

This keeps the fix local-only. list_bin_paths() still reads registry metadata and installed files through the existing cache, but does not call get_version_tags(), get_url(), github_release_*, or HTTP.head(). Install already has the resolved tag/version, so it passes that directly into file-link creation instead of recomputing from the canonical version.

Tests

• /home/risu/.cargo/bin/cargo test -p mise test_version_candidates
• /home/risu/.cargo/bin/cargo test -p mise test_srcs_
• /home/risu/.cargo/bin/cargo test -p mise backend::aqua::tests
• git diff --check

[greptile-apps]

Greptile Summary

This PR fixes binary-path resolution for Aqua packages whose git tags include an extra v after a non-v-ending prefix (e.g., canonical 1.2.3 maps to tag tool-v1.2.3). It does so locally, without the remote-fetch overhead that caused the revert of #5562.

• version_candidates(): new helper that emits one or two candidates — the prefix-applied form and, when the prefix doesn't already end in v, a second form with v inserted after the prefix. Deduplication via .unique() prevents redundant file-link generation.
• Install path: passes the already-resolved tag (v) to srcs_for_platform directly, so only the exact installed path is generated (no speculative candidates needed at install time).
• list_bin_paths path: still goes through the srcs wrapper with tv.version; the two candidates produced by version_candidates let the p.exists() filter naturally select whichever layout was actually unpacked on disk.

Confidence Score: 5/5

Safe to merge — the change is local-only, never triggers remote I/O, and the existing existence-filter in list_bin_paths naturally discards whichever candidate paths don't match the installed layout.

The logic is narrow and well-tested: version_candidates covers all reachable cases (no prefix, prefix ending in v, prefix not ending in v, version already including the prefix), the unit tests exercise both the canonical and pre-resolved-tag call paths, and deduplication guards against redundant links. No existing invariants are broken.

No files require special attention.

Important Files Changed

Filename	Overview
src/backend/aqua.rs	Introduces version_candidates() to generate both plain and v-prefixed tag variants for file path resolution; install now passes the already-resolved tag instead of the canonical version, and list_bin_paths inherits the multi-candidate logic to find whichever path actually exists on disk.

_{Reviews (3): Last reviewed commit: "Merge branch 'main' into fix/aqua-bin-pa..." | Re-trigger Greptile}

[gemini-code-assist]

Code Review

This pull request refactors version handling in the AquaBackend by introducing a version_candidates helper to generate potential version strings, including those with 'v' prefixes. Feedback identifies a logic flaw where already-prefixed versions might skip the 'v' variant, potentially causing installation failures, and suggests optimizing performance by moving the candidate generation outside the file iteration loop.