fix(frontend): drive latest-edited symlink + open nested file links in Files

[ardaerzin]

Context

Two drive file-surface bugs reported after 105.8.

• The "latest edited files" list showed the agent-files symlink row instead of real files ([bug] Latest edited files view shows agent-files symlink #5480). The agent's durable mount is folded into the drive under an agent-files/ symlink; the full drive drops that fold entry, but the summary's recents fallback (the cwd top-level listing) did not, so the bare symlink surfaced.
• Clicking a file the agent mentioned only opened it in Files when the path was written as inline code; a markdown link opened a new tab ([bug] Not all files in chat can be opened directly in the files when clicking on them #5481). Nested / NN-name/ paths (which the model tends to render as links) always bypassed the resolver.

Changes

Added one shared isAgentFilesFold(path) predicate and applied it in the full drive and both summary lists, so the fold marker is dropped consistently.

Before: the recents fallback = the cwd top level, which includes agent-files (the symlink) → shown as a row.
After: the agent-files fold marker is filtered everywhere; recents show real files (or the record-log edits).

Anchor in the chat markdown renderer now routes a RELATIVE href through the same file resolver the inline-code path uses.

Before: [plan](03-gtm/plan.md) → <a target="_blank"> (new tab).
After: a relative href that names a real drive file → the in-Files chip; a scheme: URL, //host, #fragment, or an unresolved path → the plain external link (label preserved).

Scope note for #5480 (please read before QA)

This PR removes the misleading agent-files symlink row. It does NOT change where the "latest edited files" list gets its data. That list is sourced from the session RECORD LOG (the agent's write/edit tool events), with the cwd top-level listing as a fallback when the record log is empty. The agent's durable edits live in the agent mount and only reach this list via the record log.

Consequence: if a session's record log captured no write/edit events, the list falls back to the cwd top level (now correctly WITHOUT the agent-files row) instead of showing the agent's edits, so it can look sparse or empty. That emptiness is a separate, data-dependent issue (whether the record log captured that session's writes) and is NOT addressed here. If it shows up on a real session, diagnosing it needs that session's record data to trace the record path. Flag such a session and it can be investigated as a follow-up.

Tests

• pnpm --filter @agenta/oss exec eslint clean; tsc --noEmit reports no new errors, none in the touched files.

What to QA

• Open the config Files section / chat Files rail on a session where the agent worked. "Latest edited" no longer shows an agent-files row.
• In a reply that references a nested file (e.g. 03-gtm/plan.md) as a link, click it. It opens in Files (Quick Look), not a new tab, when that file exists in the drive.
• Regression: a real external link (https://...) in a reply still opens in a new tab; a made-up relative path stays a plain link.
• See the "Scope note for [bug] Latest edited files view shows agent-files symlink #5480" above: a sparse/empty "latest edited" list on a session with no recorded write/edit events is expected and out of scope for this PR.

Fixes #5480
Fixes #5481

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Project	Deployment	Actions	Updated (UTC)
agenta-documentation	Ready	Preview, Comment	Jul 26, 2026 8:50pm

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