feat(data): add mobile device category foundations

[Seungpyo1007]

Summary

• add tablet, watch, and PDA as first-class data categories with variant-folder validation
• add tiny unverified fixture records for iPad Pro 11 M4, Galaxy Watch 42mm, and HP iPAQ H3600
• expose the new collections in the public static dump, OpenAPI snapshot, homepage stats/history, and Playground selector
• include tablet/watch/pda buckets in PR metadata summaries

Data policy

• all new fixture records use verified: false
• existing flat smartphone files are intentionally not moved in this PR
• new/variant records use data/<category>/<brand>/<year>/<base_model_slug>/<variant_slug>.json

Verification

• python -m app.validate
• python TechEngine\integrity_check.py data --strict
• cd site && npm.cmd run build
• git diff --check origin/main...HEAD

Closes #1

Closes #19

[TechEngineBot]

TechEngine change review: PASS

• PR: feat(data): add mobile device category foundations #31
• Ref: data/import-staging
• Commit: 19762b6
• Requested by: @Seungpyo1007
• Run: https://github.com/GetTechAPI/TechEngine/actions/runs/27863862987

Check	Result
python -m app.validate	PASS
python integrity_check.py TechAPI/data --strict	PASS
cd TechAPI/site && npm ci && npm run build	PASS

Changed data

Category	Added	Modified	Deleted	Added verified	Added unverified	Added Kaggle-sourced
brand	0	0	0	0	0	0
soc	0	0	0	0	0	0
smartphone	0	0	0	0	0	0
tablet	1	0	0	0	1	0
watch	1	0	0	0	1	0
pda	1	0	0	0	1	0
gpu	0	0	0	0	0	0
cpu	0	0	0	0	0	0

Changed record examples

tablet added

• tablet/apple/2024/ipad-pro-11-m4/ipad-pro-11-m4-wifi-8gb-256gb.json - iPad Pro 11-inch (M4, Wi-Fi, 8GB/256GB)

watch added

• watch/samsung/2018/galaxy-watch/galaxy-watch-global-bluetooth-42mm.json - Galaxy Watch (Bluetooth, 42mm)

pda added

• pda/hp/2000/ipaq-h3600/ipaq-h3600-base.json - HP iPAQ H3600

Heuristic review

• Added records by manufacturer/brand: apple: 1, samsung: 1, hp: 1
• Added records by source class: other: 3
• Heuristic warnings: none found.

Changed site

Area	Added	Modified	Deleted
homepage/site	0	2	0

Modified site files

• site/src/pages/index.astro
• site/src/scripts/techapi.js

[TechEngineBot]

TechEngine validation stats: PASS

• PR: feat(data): add mobile device category foundations #31
• Ref: data/import-staging
• Commit: 19762b6
• Run: https://github.com/GetTechAPI/TechEngine/actions/runs/27863862987

Data summary

Category	Total	Verified	Unverified	Missing verified	Tracked	Verified % of tracked
brand	189	0	60	129	60	0.0%
soc	2067	58	2009	0	2067	2.8%
smartphone	31671	184	31487	0	31671	0.6%
tablet	1	0	1	0	1	0.0%
watch	1	0	1	0	1	0.0%
pda	1	0	1	0	1	0.0%
gpu	2030	0	2030	0	2030	0.0%
cpu	3977	976	3001	0	3977	24.5%
all	39937	1218	38590	129	39808	3.1%

Warning

Tracked verified coverage is below 50% for brand 0.0% (0/60), tablet 0.0% (0/1), watch 0.0% (0/1), pda 0.0% (0/1), gpu 0.0% (0/2030), smartphone 0.6% (184/31671), soc 2.8% (58/2067), all 3.1% (1218/39808), and 1 more.
Tracked coverage excludes records missing the verified field; see the Missing verified column for those records.
This does not fail validation. Keep imported records verified: false until manual audit, but treat this as follow-up verification work before relying on the affected categories as curated data.

Validation notes

• Full advisory outlier listings are suppressed on successful runs because they are dataset-wide and mostly stable between PRs.
• Failure runs still include a detailed log excerpt for debugging.

Key output:

## app.validate
## integrity_check.py --strict
loaded CPU=3977 GPU=2030
✅ integrity gate: no hard anomalies.

Integrity section	Flagged lines
structural	0
CPU name/tier consistency (desktop mainstream only)	0
CPU single>multi (cinebench/geekbench — should be multi>=single)	0
CPU era-vs-score outliers	8
CPU cross-source ratio outliers (possible wrong-variant)	152
GPU cross-source ratio outliers + sanity	18

Homepage build:

07:13:40 [build] 2 page(s) built in 16.52s
07:13:40 [build] Complete!