[FEATURE] Show file path inline for single-file Read operations instead of collapsing to "Reading 1 file"

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Since the collapsed read/search groups feature was introduced (refined in v2.1.19–2.1.20),
when Claude reads a single file, the UI displays:

Reading 1 file

...instead of showing the actual file path like it used to (e.g., Reading src/components/App.tsx).

This reduces visibility into what Claude is doing. For single-file reads, the collapsed
summary removes useful information without saving meaningful screen space — it actually
makes it harder to follow the agent's actions in real time.

The collapsed grouping makes sense for multi-file reads (e.g., "Reading 5 files"), but
for a single file, the path should be shown inline.

Proposed Solution

When a collapsed read/search group contains only 1 file, display the file path
inline instead of collapsing it. Apply collapsing only when the group contains 2+ files.

This could also apply to other single-item groups like:

• "Searching 1 file" → "Searching src/utils/*.ts"
• "Globbing 1 pattern" → "Globbing **/*.tsx"

Alternative Solutions

1. A setting to disable collapsing entirely — too noisy for power users who

read many files

1. Always expand by default — same problem, too verbose for multi-file operations
2. Show path in parentheses — e.g., "Reading 1 file (src/App.tsx)" — acceptable

but less clean than just showing the path

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

Reading src/components/App.tsx ← single file: show path inline
Read src/components/App.tsx ← completed: still show path

Reading 5 files ← multi-file: collapse is fine
Read 5 files ← completed collapse is fine

Additional Context

Related discussion: #8061 (Sub-agent expansion UX)

The v2.1.20 changelog notes:

• "Changed collapsed read/search groups to show present tense while in progress,

past tense when complete"

The v2.1.19 changelog notes:

• "Fixed Bash read commands not being counted in collapsed read/search groups"

These fixes improved the collapsed groups feature, but the single-file case is an
ergonomic regression from the previous behavior where file paths were always visible.