fix: add time and size estimation below export buttons (#224) - #2050

Investigator 1 of 3 reviewed the single assigned PR (CapSoftware/Cap #2050) and found the patch to be benign. Both changed files contain only presentational UI additions—estimated export time and file size badges rendered from pre-existing local data structures. No network calls, credential access, obfuscated code, dependency changes, CI tampering, or lifecycle hooks were introduced. However, the contributor’s activity block shows zero total events, zero prior PRs, and zero review activity. This shard covers only 1 of 3 candidate PRs, so a contributor-level verdict cannot be established without the findings from investigators 2 and 3. Investigator 2 shard contains one fully-hydrated PR (Ashrockzzz2003/Data_Structures_and_Algorithms#94) adding introspective sort implementations in Python and Java. Both files are clean algorithm implementations with no network access, file I/O, obfuscation, or suspicious dependencies. However, this is only 1 of 3 candidate PRs; activity metadata is entirely empty despite 3 candidate PRs existing, indicating possible data truncation. The contributor's heuristic score is 68 (caution) due to cross-repository activity. Without visibility into the remaining 2 candidate PRs, a confident contributor-level verdict cannot be reached from this shard alone.