feat: frame-based positioning and mark system foundation

Core Changes:
- Fix SearchView to use start_frame/end_frame directly (no time*fps conversion)
- Add hard_delete support to delete_trace API
- VideoPlayer: Main timeline + Mark system foundation
- Proxy: Add local routes for auth, media, identity-matches, cluster-results
- Add .gitignore to exclude build artifacts and dependencies

Design Documents:
- Multi-track Mark system design (.opencode/plans/)
- Video editing positioning standards research

Files Modified:
- src/views/SearchView.vue: Frame positioning, ensureMinDuration (240 frames)
- src/views/PeopleView.vue: batchDeleteGroups with hard_delete
- src/api/index.ts: delete_trace with hard_delete body
- src/components/VideoPlayer.vue: Timeline + Mark UI
- src-tauri/src/proxy.rs: New local routes
- AGENTS.md: Update documentation

src-tauri/Cargo.lock

@@ -3509,6 +3509,15 @@ dependencies = [
  "serde_json",
 ]
 
+[[package]]
+name = "kamadak-exif"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1130d80c7374efad55a117d715a3af9368f0fa7a2c54573afc15a188cd984837"
+dependencies = [
+ "mutate_once",
+]
+
 [[package]]
 name = "keccak"
 version = "0.2.0"
@@ -3704,6 +3713,15 @@ dependencies = [
  "hashbrown 0.16.1",
 ]
 
+[[package]]
+name = "lz4_flex"
+version = "0.11.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "373f5eceeeab7925e0c1098212f2fbc4d416adec9d35051a6ab251e824c1854a"
+dependencies = [
+ "twox-hash",
+]
+
 [[package]]
 name = "lz4_flex"
 version = "0.13.1"
@@ -3747,6 +3765,7 @@ dependencies = [
  "http 1.4.2",
  "lazy_static",
  "log",
+ "lz4_flex 0.11.6",
  "md5 0.8.0",
  "nix 0.29.0",
  "once_cell",
@@ -3768,18 +3787,21 @@ dependencies = [
  "smb2",
  "ssh-key",
  "ssh2",
+ "sysinfo",
  "tar",
  "tempfile",
  "tokio",
  "tokio-postgres",
  "tokio-util",
  "toml 0.8.2",
+ "tower-http 0.5.2",
  "tracing",
  "tracing-subscriber",
  "ureq",
  "url",
  "uuid",
  "x25519-dalek",
+ "xattr",
  "xmltree",
  "zip",
  "zstd 0.13.3",
@@ -3933,14 +3955,17 @@ dependencies = [
 name = "momentry-studio"
 version = "0.1.0"
 dependencies = [
+ "argon2 0.5.3",
  "axum",
  "base64 0.22.1",
  "chrono",
  "dirs 5.0.1",
  "futures",
  "image",
+ "kamadak-exif",
  "lru 0.12.5",
  "markbase-core",
+ "rand 0.8.6",
  "reqwest 0.11.27",
  "rusqlite",
  "serde",
@@ -3992,6 +4017,12 @@ dependencies = [
  "version_check",
 ]
 
+[[package]]
+name = "mutate_once"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "13d2233c9842d08cfe13f9eac96e207ca6a2ea10b80259ebe8ad0268be27d2af"
+
 [[package]]
 name = "native-tls"
 version = "0.2.18"
@@ -4063,6 +4094,15 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "ntapi"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3b335231dfd352ffb0f8017f3b6027a4917f7df785ea2143d8af2adc66980ae"
+dependencies = [
+ "winapi",
+]
+
 [[package]]
 name = "nu-ansi-term"
 version = "0.50.3"
@@ -6509,7 +6549,7 @@ dependencies = [
  "getrandom 0.4.2",
  "hmac 0.13.0",
  "log",
- "lz4_flex",
+ "lz4_flex 0.13.1",
  "md-5 0.11.0",
  "md4",
  "num_enum",
@@ -7027,6 +7067,20 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "sysinfo"
+version = "0.32.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4c33cd241af0f2e9e3b5c32163b873b29956890b5342e6745b917ce9d490f4af"
+dependencies = [
+ "core-foundation-sys",
+ "libc",
+ "memchr",
+ "ntapi",
+ "rayon",
+ "windows 0.57.0",
+]
+
 [[package]]
 name = "system-configuration"
 version = "0.5.1"
@@ -8530,6 +8584,16 @@ dependencies = [
  "windows-version",
 ]
 
+[[package]]
+name = "windows"
+version = "0.57.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "12342cb4d8e3b046f3d80effd474a7a02447231330ef77d71daa6fbc40681143"
+dependencies = [
+ "windows-core 0.57.0",
+ "windows-targets 0.52.6",
+]
+
 [[package]]
 name = "windows"
 version = "0.58.0"
@@ -8583,6 +8647,18 @@ dependencies = [
  "windows-core 0.62.2",
 ]
 
+[[package]]
+name = "windows-core"
+version = "0.57.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2ed2439a290666cd67ecce2b0ffaad89c2a56b976b736e6ece670297897832d"
+dependencies = [
+ "windows-implement 0.57.0",
+ "windows-interface 0.57.0",
+ "windows-result 0.1.2",
+ "windows-targets 0.52.6",
+]
+
 [[package]]
 name = "windows-core"
 version = "0.58.0"
@@ -8644,6 +8720,17 @@ dependencies = [
  "windows-threading 0.2.1",
 ]
 
+[[package]]
+name = "windows-implement"
+version = "0.57.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9107ddc059d5b6fbfbffdfa7a7fe3e22a226def0b2608f72e9d552763d3e1ad7"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
 [[package]]
 name = "windows-implement"
 version = "0.58.0"
@@ -8666,6 +8753,17 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "windows-interface"
+version = "0.57.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "29bee4b38ea3cde66011baa44dba677c432a78593e202392d1e9070cf2a7fca7"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
 [[package]]
 name = "windows-interface"
 version = "0.58.0"
@@ -8720,6 +8818,15 @@ dependencies = [
  "windows-link 0.2.1",
 ]
 
+[[package]]
+name = "windows-result"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e383302e8ec8515204254685643de10811af0ed97ea37210dc26fb0032647f8"
+dependencies = [
+ "windows-targets 0.52.6",
+]
+
 [[package]]
 name = "windows-result"
 version = "0.2.0"